Run 1 summary

https://stf.xelta.ai/models/video_audio_generation/seedance-2-0-video-generation

Tested 2026-09-14 10:53:13 using Chrome 150.0.7871.46 (runtime settings)

SummaryWaterfallMetricsRenderingCoachPageXrayThird party

Summary

Google Web Vitals

77 msTTFB
1.152 sLargest Contentful Paint
0.407Cumulative Layout Shift
636 msTotal Blocking Time

Loading

540 msFirst Paint
7.340 sFully Loaded
237 msMax Potential FID

Page weight & requests

2.3 MBTotal transfer size
6.3 MBTotal content size
190Requests

CPU

11Long tasks
2.265 sLast long task at

Visual progress

501 msFirst Visual Change
1.024 sSpeed Index
1.170 sVisual Complete 85%
1.337 sVisual Complete 99%
4.312 sLast Visual Change
Screenshot
Run 1 · after page complete

Waterfall

First paintFCPLCPDOMContentLoadedDOM interactiveLoadRender-blockingRedirectError

Rendering

Run 1
0.000 s
0s1s2s3s4s

The red band on the timeline marks when the main thread was busy with long tasks: moments when the page could not paint or respond, however the video looks.

Download video

Filmstrip

41 frames

Use --filmstrip.showAll to show all filmstrips.

Frame at 0 ms
0 ms
0 %
Frame at 400 ms
400 ms
0 %
Frame at 600 ms
600 ms
40 %
Frame at 700 ms
700 ms
40 %
Frame at 800 ms
800 ms
40 %
Frame at 900 ms
900 ms
21 %
Frame at 1.000 s
1.000 s
21 %
Frame at 1.100 s
1.100 s
22 %
Frame at 1.200 s
1.200 s
98 %
Frame at 1.300 s
1.300 s
98 %
Frame at 1.400 s
1.400 s
99 %
Frame at 1.500 s
1.500 s
99 %
Frame at 1.600 s
1.600 s
99 %
Frame at 1.700 s
1.700 s
99 %
Frame at 1.800 s
1.800 s
99 %
Frame at 1.900 s
1.900 s
99 %
Frame at 2.000 s
2.000 s
99 %
Frame at 2.100 s
2.100 s
99 %
Frame at 2.200 s
2.200 s
99 %
Frame at 2.300 s
2.300 s
99 %
Frame at 2.400 s
2.400 s
99 %
Frame at 2.500 s
2.500 s
99 %
Frame at 2.600 s
2.600 s
99 %
Frame at 2.700 s
2.700 s
99 %
Frame at 2.800 s
2.800 s
99 %
Frame at 2.900 s
2.900 s
99 %
Frame at 3.000 s
3.000 s
99 %
Frame at 3.100 s
3.100 s
99 %
Frame at 3.200 s
3.200 s
99 %
Frame at 3.300 s
3.300 s
99 %
Frame at 3.400 s
3.400 s
99 %
Frame at 3.500 s
3.500 s
99 %
Frame at 3.600 s
3.600 s
99 %
Frame at 3.700 s
3.700 s
99 %
Frame at 3.800 s
3.800 s
99 %
Frame at 3.900 s
3.900 s
99 %
Frame at 4.000 s
4.000 s
99 %
Frame at 4.100 s
4.100 s
99 %
Frame at 4.200 s
4.200 s
99 %
Frame at 4.300 s
4.300 s
99 %
Frame at 4.400 s
4.400 s
100 %

Click a frame to seek the video to that moment. The dot marks frames where the page changed visually.

Why was rendering delayed?

Rendering was not meaningfully delayed. First paint landed at 540 ms on a 77 ms first byte. The largest paint followed at 1.152 s.

Want to see how much CSS style-recalculation work delayed FCP and LCP, plus CPU long tasks? Run with --cpu.

Render blocking requests

32 requests · 432.1 KB

Blocking requests delay both paints: the browser renders nothing until they arrive, so they push First Contentful Paint and everything after it, including the largest paint (LCP). Requests that block the parser inside the body stall everything after them in the document. Load JavaScript with defer or async, and keep non-critical CSS off the critical path with media attributes. Bars show when each request loaded on a clock that runs to the last paint (the dashed line is FCP, the clock ends at LCP); the gap after the bars is style and layout work. Web fonts are context, not blockers: text renders invisible or in a fallback face while they load, so a font finishing after a paint is the classic reason text changed late.

RequestWhen it loadedTransferDownload
document
stf.xelta.ai · TTFB 77 ms
75 ms
29.4 KB74 ms
3sy5ezjqwbusz.jspotentially blocking
javascript · stf.xelta.ai
251 ms
48.8 KB251 ms
3b1qi14iervjp.jspotentially blocking
javascript · stf.xelta.ai
228 ms
10.2 KB228 ms
1ghsza2wgj0ob.jspotentially blocking
javascript · stf.xelta.ai
220 ms
44.0 KB220 ms
2qwl8sgb3v89v.jspotentially blocking
javascript · stf.xelta.ai
216 ms
19.8 KB216 ms
3lj2255jzxgl-.jspotentially blocking
javascript · stf.xelta.ai
213 ms
16.1 KB213 ms
2_bm7tpe8f5ne.jspotentially blocking
javascript · stf.xelta.ai
212 ms
24.1 KB212 ms
2e28r49c7zefw.jspotentially blocking
javascript · stf.xelta.ai
212 ms
18.5 KB212 ms
0qyja2b6pvkmf.jspotentially blocking
javascript · stf.xelta.ai
212 ms
9.9 KB212 ms
24 more requests
all done by 359 ms
240.9 KB
LCP resource
image — downloaded by 897 ms, rendered at 1.152 s
428 ms
16.7 KB428 ms
web font · stf.xelta.ai
224 ms
64.9 KB224 ms
web font · stf.xelta.ai
217 ms
8.2 KB217 ms
web font · stf.xelta.ai
218 ms
35.1 KB218 ms
0288 ms864 msFCP 540 msLCP 1.152 s

Coach

The coach helps you find performance problems on your web page using web performance best practice rules. And gives you advice on privacy and best practices. Tested using Coach-core version 9.2.1.

Performance advice

75
2 errors8 warnings3 info
warn(0)Avoid using Google Tag Manager.googleTagManager

The page is using Google Tag Manager, this is a performance risk since non-tech users can add JavaScript to your page.

Google Tag Manager makes it possible for non tech users to add scripts to your page that will downgrade performance.

warn(0)Avoid CPU Long TaskslongTasks

The page has 11 CPU long tasks with the total of 1.256 s. The total blocking time is 636 ms and 2 long tasks before first contentful paint with total time of 170 ms. However the CPU Long Task is depending on the computer/phones actual CPU speed, so you should measure this on the same type of the device that your user is using. Use Geckoprofiler for Firefox or Chromes tracelog to debug your long tasks.

Long CPU tasks locks the thread. To the user this is commonly visible as a "locked up" page where the browser is unable to respond to user input; this is a major source of bad user experience on the web today. However the CPU Long Task is depending on the computer/phones actual CPU speed, so you should measure this on the same type of the device that your user is using. To debug you should use the Chrome timeline log and drag/drop it into devtools or use Firefox Geckoprofiler.

Offenders
  • self
  • self
  • self
  • unknown
  • self
  • self
  • self
  • self
  • self
  • self
  • self
warn(0)Avoid extra requests by setting cache headerscacheHeaders

The page has 74 requests that are missing a cache time. Configure a cache time so the browser doesn't need to download them every time. It will save 111.5 kB the next access.

The easiest way to make your page fast is to avoid doing requests to the server. Setting a cache header on your server response will tell the browser that it doesn't need to download the asset again during the configured cache time! Always try to set a cache time if the content doesn't change for every request.

Offenders
infoAvoid too many fontsfewFonts
warn(0)Total JavaScript size shouldn't be too bigjavascriptSize

The total JavaScript transfer size is 1.6 MB and the uncompressed size is 5.1 MB. This is totally crazy! There is really room for improvement here.

A lot of JavaScript often means you are downloading more than you need. How complex is the page and what can the user do on the page? Do you use multiple JavaScript frameworks?

Offenders
URLTransferContent
https://static.cloudflareinsights.com/beacon.min.js/v31edd6df95cf4e85bb4c19e7a9bdbcba178836298749510.1 KB29.6 KB
https://stf.xelta.ai/_next/static/chunks/0_cis5bf89bk3.js3.7 KB9.3 KB
https://stf.xelta.ai/_next/static/chunks/3ur639cpt-7ui.js11.3 KB38.9 KB
https://stf.xelta.ai/_next/static/chunks/3dlul65aa-nvq.js73.3 KB232.0 KB
https://stf.xelta.ai/_next/static/chunks/3sy5ezjqwbusz.js48.8 KB171.2 KB
https://stf.xelta.ai/_next/static/chunks/turbopack-24c8re3t_hr9w.js6.6 KB18.4 KB
https://stf.xelta.ai/_next/static/chunks/043c2jn61g8ch.js6.5 KB20.4 KB
https://stf.xelta.ai/_next/static/chunks/17d1-bwqhg7yp.js9.7 KB27.2 KB
https://stf.xelta.ai/_next/static/chunks/1zleqhxssu9oh.js11.0 KB30.1 KB
https://stf.xelta.ai/_next/static/chunks/2uoulaw6kucli.js10.1 KB26.2 KB
https://stf.xelta.ai/_next/static/chunks/00up96pc24a4e.js10.4 KB25.8 KB
https://stf.xelta.ai/_next/static/chunks/0v-y_275lo0v3.js10.8 KB29.1 KB
https://stf.xelta.ai/_next/static/chunks/3b1qi14iervjp.js10.2 KB27.5 KB
https://stf.xelta.ai/_next/static/chunks/0hr8xag69xxbh.js8.0 KB20.9 KB
https://stf.xelta.ai/_next/static/chunks/1wf8v9a5j3yl_.js8.3 KB32.8 KB
https://stf.xelta.ai/_next/static/chunks/2f2i__v854m6r.js9.2 KB30.0 KB
https://stf.xelta.ai/_next/static/chunks/36h4r9duhyjke.js11.1 KB37.2 KB
https://stf.xelta.ai/_next/static/chunks/2qwl8sgb3v89v.js19.8 KB62.0 KB
https://stf.xelta.ai/_next/static/chunks/2dunoo0yt9za-.js12.7 KB33.7 KB
https://stf.xelta.ai/_next/static/chunks/3scmkth2l2ag2.js15.3 KB43.9 KB
https://stf.xelta.ai/_next/static/chunks/1j2emy2xhevk5.js6.7 KB15.0 KB
https://stf.xelta.ai/_next/static/chunks/2_bm7tpe8f5ne.js24.1 KB77.7 KB
https://stf.xelta.ai/_next/static/chunks/2e28r49c7zefw.js18.5 KB51.1 KB
https://stf.xelta.ai/_next/static/chunks/1ghsza2wgj0ob.js44.0 KB140.5 KB
https://stf.xelta.ai/_next/static/chunks/07so5nrchfe88.js10.2 KB32.5 KB
https://stf.xelta.ai/_next/static/chunks/3lj2255jzxgl-.js16.1 KB51.2 KB
https://stf.xelta.ai/_next/static/chunks/0qyja2b6pvkmf.js9.9 KB28.2 KB
https://stf.xelta.ai/_next/static/chunks/0tynzomeo1z-p.js1.6 KB1003 B
https://stf.xelta.ai/_next/static/chunks/11ottfcrb__c6.js1.9 KB1.8 KB
https://stf.xelta.ai/_next/static/chunks/0r_-zfn80zo41.js2.3 KB2.7 KB
https://stf.xelta.ai/_next/static/chunks/16orvb4qnjgm7.js41.8 KB139.5 KB
https://stf.xelta.ai/_next/static/chunks/1r4b-2voe6my2.js2.4 KB2.9 KB
https://stf.xelta.ai/_next/static/chunks/2tldojfjwreij.js10.6 KB36.2 KB
https://stf.xelta.ai/_next/static/chunks/1_sa18c8qfniy.js6.2 KB16.2 KB
https://www.googletagmanager.com/gtm.js?id=GTM-5XNS5NQ2115.0 KB324.1 KB
https://www.googletagmanager.com/gtag/js?id=G-CPG3NLBKHP186.6 KB567.5 KB
https://connect.facebook.net/en_US/fbevents.js110.4 KB410.0 KB
https://stf.xelta.ai/_next/static/chunks/1ki4hltmjvw2d.js77.6 KB253.9 KB
https://stf.xelta.ai/_next/static/chunks/3f1tw02kuplod.js3.3 KB6.2 KB
https://stf.xelta.ai/_next/static/chunks/2k5vpzc_p9jpq.js35.3 KB106.7 KB
https://connect.facebook.net/signals/config/1123404090023729.../1123404090023729137.1 KB485.1 KB
https://www.googletagmanager.com/gtag/js?id=G-CPG3NLBKHP&cx=c&gtm=4e6992h1186.6 KB567.5 KB
https://stf.xelta.ai/_next/static/chunks/3m9-oomc-qdle.js1.4 KB455 B
https://stf.xelta.ai/_next/static/chunks/0en-dl3l5-bm2.js10.7 KB33.9 KB
https://stf.xelta.ai/_next/static/chunks/3601yvag566gb.js10.4 KB31.2 KB
https://stf.xelta.ai/_next/static/chunks/3dh4veiardltk.js47.0 KB206.7 KB
https://stf.xelta.ai/_next/static/chunks/0inxmj29ffnqy.js6.4 KB20.3 KB
https://stf.xelta.ai/_next/static/chunks/1umv1owun4cfl.js8.6 KB33.7 KB
https://stf.xelta.ai/_next/static/chunks/1ytwdotu3mdq4.js10.3 KB27.8 KB
https://stf.xelta.ai/_next/static/chunks/2699mm_b_frg_.js8.0 KB21.0 KB
https://stf.xelta.ai/_next/static/chunks/2rlqhawoa2-1z.js24.1 KB77.8 KB
https://stf.xelta.ai/_next/static/chunks/0qj250lktf-9_.js12.8 KB34.0 KB
https://stf.xelta.ai/_next/static/chunks/08f3iux3oyyat.js12.5 KB34.1 KB
https://stf.xelta.ai/_next/static/chunks/26--kr-ciax9i.js42.8 KB141.9 KB
https://stf.xelta.ai/_next/static/chunks/28l2j31ow31z4.js17.9 KB49.0 KB
warn(10)Apply the right priority hints to the LCP imagelcpImageHints

The LCP image has loading="lazy", which delays its download until the browser thinks it is near the viewport — and so directly delays the LCP metric. Remove loading="lazy" from the LCP image. The LCP image is missing fetchpriority="high". Adding it tells the browser to fetch the image with high priority instead of the default heuristic (which often deprioritises hero images that are loaded after the HTML has been parsed).

When the Largest Contentful Paint element is an image, the browser priority hints applied to that element directly affect the LCP metric. The image must NOT be loading="lazy" (that defers the fetch until near-viewport, which is the opposite of what an LCP image needs) and SHOULD be fetchpriority="high" (so the browser fetches it with high priority instead of guessing). https://web.dev/articles/fetch-priority

Offenders
  • <img alt="Background" loading="lazy" decoding="async" data-nimg="fill" class="absolute inset-0 object-cover object-bottom z-0 pointer-events-none" sizes="100vw" srcset="/_next/image?url=https%3A%2F%2Fmedia.xelta.ai%2Fuploads%2Finput%2Fdefault%2F1787558816156-9dcb721c4f2e2ef9.webp&amp;w=640&amp;q=75 640w, /_next/image?url=https%3A%2F%2Fmedia.xelta.ai%2Fuploads%2Finput%2Fdefault%2F1787558816156-9dcb721c4f2e2ef9.webp&amp;w=750&amp;q=75 750w, /_next/image?url=https%3A%2F%2Fmedia.xelta.ai%2Fuploads%2Finput%2Fdefault%2F1787558816156-9dcb721c4f2e2ef9.webp&amp;w=828&amp;q=75 828w, /_next/image?url=https%3A%2F%2Fmedia.xelta.ai%2Fuploads%2Finput%2Fdefault%2F1787558816156-9dcb721c4f2e2ef9.webp&amp;w=1080&amp;q=75 1080w, /_next/image?url=https%3A%2F%2Fmedia.xelta.ai%2Fuploads%2Finput%2Fdefault%2F1787558816156-9dcb721c4f2e2ef9.webp&amp;w=1200&amp;q=75 1200w, /_next/image?url=https%3A%2F%2Fmedia.xelta.ai%2Fuploads%2Finput%2Fdefault%2F1787558816156-9dcb721c4f2e2ef9.webp&amp;w=1920&amp;q=75 1920w" src="/_next/image?url=https%3A%2F%2Fmedia.xelta.ai%2Fuploads%2Finput%2Fdefault%2F1787558816156-9dcb721c4f2e2ef9.webp&amp;w=1920&amp;q=75" style="position: absolute; height: 100%; width: 100%; inset: 0px; color: transparent;">
  • <img alt="Background" loading="lazy" decoding="async" data-nimg="fill" class="absolute inset-0 object-cover object-bottom z-0 pointer-events-none" sizes="100vw" srcset="/_next/image?url=https%3A%2F%2Fmedia.xelta.ai%2Fuploads%2Finput%2Fdefault%2F1787558816156-9dcb721c4f2e2ef9.webp&amp;w=640&amp;q=75 640w, /_next/image?url=https%3A%2F%2Fmedia.xelta.ai%2Fuploads%2Finput%2Fdefault%2F1787558816156-9dcb721c4f2e2ef9.webp&amp;w=750&amp;q=75 750w, /_next/image?url=https%3A%2F%2Fmedia.xelta.ai%2Fuploads%2Finput%2Fdefault%2F1787558816156-9dcb721c4f2e2ef9.webp&amp;w=828&amp;q=75 828w, /_next/image?url=https%3A%2F%2Fmedia.xelta.ai%2Fuploads%2Finput%2Fdefault%2F1787558816156-9dcb721c4f2e2ef9.webp&amp;w=1080&amp;q=75 1080w, /_next/image?url=https%3A%2F%2Fmedia.xelta.ai%2Fuploads%2Finput%2Fdefault%2F1787558816156-9dcb721c4f2e2ef9.webp&amp;w=1200&amp;q=75 1200w, /_next/image?url=https%3A%2F%2Fmedia.xelta.ai%2Fuploads%2Finput%2Fdefault%2F1787558816156-9dcb721c4f2e2ef9.webp&amp;w=1920&amp;q=75 1920w" src="/_next/image?url=https%3A%2F%2Fmedia.xelta.ai%2Fuploads%2Finput%2Fdefault%2F1787558816156-9dcb721c4f2e2ef9.webp&amp;w=1920&amp;q=75" style="position: absolute; height: 100%; width: 100%; inset: 0px; color: transparent;">
error(20)Avoid using incorrect mime typesmimeTypes

The page has 80 misconfigured mime types.

It's not a great idea to let browsers guess content types (content sniffing), in some cases it can actually be a security risk.

Offenders
error(20)Avoid missing and error requestsresponseOk
warn(50)Total CSS size shouldn't be too bigcssSize

The total CSS transfer size is 91.9 kB and uncompressed size is 687.3 kB. That is big and the CSS could most probably be smaller.

Delivering a massive amount of CSS to the browser is not the best thing you can do, because it means more work for the browser when parsing the CSS against the HTML and that makes the rendering slower. Try to send only the CSS that is used on that page. And make sure to remove CSS rules when they aren't used anymore.

Offenders
URLTransferContent
https://stf.xelta.ai/_next/static/chunks/1lgy-fxfy7-hi.css85.8 KB634.9 KB
https://stf.xelta.ai/_next/static/chunks/0kldb6fnstui0.css3.9 KB36.2 KB
warn(60)Don't use private headers on static contentprivateAssets

The page has 5 requests with private headers. The main page has a private header. It could be right in some cases where the user can be logged in and served specific content. But if your asset is static it should never be private. Make sure that the assets really should be private and only used by one user. Otherwise, make it cacheable for everyone.

If you set private headers on content, that means that the content are specific for that user. Static content should be able to be cached and used by everyone. Avoid setting the cache header to private.

Offenders
infoLong cache headers is goodcacheHeadersLong

The page has 30 requests that have a shorter cache time than one year (but still a cache time).

Setting a cache header is good. Setting a long cache header (a year) is even better because the asset will stay in the browser cache across visits. For content-hashed URLs (e.g. app.4af2.css) you can safely use Cache-Control: max-age=31536000, immutable. For unversioned URLs that may change, use a revalidating strategy instead.

Offenders
infoMake each CSS response smalloptimalCssSize

https://stf.xelta.ai/_next/static/chunks/1lgy-fxfy7-hi.css size is 87.9 kB (87867) and that is bigger than the limit of 25 kB. Try to keep each CSS response under 25 kB.

Render-blocking CSS holds up the first paint until it has fully downloaded, parsed and applied, so smaller CSS files mean a faster start. Split your CSS into a small critical bundle inlined or eagerly loaded, with the rest lazy-loaded.

Offenders
URLTransferContent
https://stf.xelta.ai/_next/static/chunks/1lgy-fxfy7-hi.css85.8 KB634.9 KB
warn(95)Inline CSS for faster first renderinlineCss

The page has both inline CSS and CSS requests even though it uses a HTTP/2-ish connection. If you have many users on slow connections, it can be better to only inline the CSS. Run your own tests and check the waterfall graph to see what happens.

In the early days of the Internet, inlining CSS was one of the ugliest things you can do. That has changed if you want your page to start rendering fast for your user. Always inline the critical CSS when you use HTTP/1 and HTTP/2 (avoid doing CSS requests that block rendering) and lazy load and cache the rest of the CSS. It is a little more complicated when using HTTP/2. Does your server support HTTP push? Then maybe that can help. Do you have a lot of users on a slow connection and are serving large chunks of HTML? Then it could be better to use the inline technique, becasue some servers always prioritize HTML content over CSS so the user needs to download the HTML first, before the CSS is downloaded.

Best practice advice

76
1 error4 info
error(0)Cumulative Layout ShiftcumulativeLayoutShift

You have a poor cumulative layout shift score (0.4067). It is in the Google Web Vitals poor range, with a shift higher than 0.25. You should manually check the filmstrip or video and check if it will affect the user.

Cumulative Layout Shift measures the sum total of all individual layout shift scores for unexpected layout shift that occur. The metric is measuring visual stability by quantify how often users experience unexpected layout shifts. It is one of Google Web Vitals.

infoAvoid unnecessary headersunnecessaryHeaders

There are 1 response that sets a p3p header. There are 5 responses that sets both a max-age and expires header. There are 3 responses that sets a pragma no-cache header (that is a request header). There are 188 responses that sets a server header.

Do not send headers that you don't need. We look for p3p, cache-control and max-age, pragma, server and x-frame-options headers. Have a look at Andrew Betts - Headers for Hackers talk as a guide https://www.youtube.com/watch?v=k92ZbrY815c or read https://www.fastly.com/blog/headers-we-dont-want.

Offenders
infoMeta descriptionmetaDescription

The meta description is too long. It has 194 characters, the recommended max is 160

Use a page description to make the page more relevant to search engines.

infoDo not send too long headerslongHeaders

https://stf.xelta.ai...-video-generation has a header link that is 1927 characters long. https://stf.xelta.ai...-studio/magic-cut has a header content-security-policy-report-only that is 799 characters long. https://stf.xelta.ai...-studio/magic-cut has a header report-to that is 619 characters long. https://connect.face...en_US/fbevents.js has a header content-security-policy that is 1344 characters long. https://connect.face...en_US/fbevents.js has a header permissions-policy that is 874 characters long. https://connect.face.../1123404090023729 has a header content-security-policy that is 1344 characters long. https://connect.face.../1123404090023729 has a header permissions-policy that is 874 characters long. https://stf.xelta.ai...i/flow/comic-flow has a header content-security-policy-report-only that is 798 characters long. https://stf.xelta.ai...i/flow/comic-flow has a header report-to that is 618 characters long. https://stf.xelta.ai...l/sketch-to-image has a header content-security-policy-report-only that is 799 characters long. https://stf.xelta.ai...l/sketch-to-image has a header report-to that is 619 characters long. https://stf.xelta.ai...erse/reel-creator has a header content-security-policy-report-only that is 798 characters long. https://stf.xelta.ai...erse/reel-creator has a header report-to that is 626 characters long. https://stf.xelta.ai...kedin-autoposting has a header content-security-policy-report-only that is 799 characters long. https://stf.xelta.ai...kedin-autoposting has a header report-to that is 629 characters long. https://stf.xelta.ai...2v-flash-workflow has a header content-security-policy-report-only that is 798 characters long. https://stf.xelta.ai...2v-flash-workflow has a header report-to that is 616 characters long.

Do not send response headers that are too long.

Offenders
infoAvoid use too many response headersmanyHeaders

https://stb.xelta.ai...nts/active-banner has 34 headers.https://stf.xelta.ai/api/geo has 32 headers.

Avoid send too many response headers.

Offenders

Privacy advice

67
1 error5 warnings2 info
warn(0)Avoid using Google Analyticsga

The page is using Google Analytics meaning you share your users private information with Google. You should use analytics that care about user privacy, something like https://matomo.org.

Google Analytics share private user information with Google that your user hasn't agreed on sharing.

warn(0)Avoid embedding services from surveillance capitalist companiessurveillance

The page embeds 5 resources from companies that profit from user surveillance. Consider privacy-respecting alternatives.

Embedding scripts or iframes from companies whose business model is surveillance capitalism (Google, Facebook, etc.) leaks detailed user data on every page view, often before the user has had a chance to consent. See https://en.wikipedia.org/wiki/Surveillance_capitalism for background. Prefer privacy-respecting alternatives where possible.

Offenders
infoSet a Cross-Origin-Embedder-Policy header so cross-origin subresources opt in to being embedded.crossOriginEmbedderPolicyHeader

Set a Cross-Origin-Embedder-Policy header (typically require-corp or credentialless) on the document response to control cross-origin embedding.

Cross-Origin-Embedder-Policy (COEP) makes the page refuse to load cross-origin subresources unless they explicitly opt in via CORP or CORS. Together with Cross-Origin-Opener-Policy it puts the page in a cross-origin isolated context, which mitigates cross-window side-channel attacks (Spectre) and unlocks high-resolution timers and SharedArrayBuffer. https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Cross-Origin-Embedder-Policy

Offenders
warn(0)Set a Cross-Origin-Opener-Policy header to isolate the page from cross-origin windows.crossOriginOpenerPolicyHeader

Set a Cross-Origin-Opener-Policy header (typically same-origin) on the document response to isolate the page from cross-origin windows.

Cross-Origin-Opener-Policy (COOP) lets a page sever its window-group ties to cross-origin documents that opened it or that it opens. Together with Cross-Origin-Embedder-Policy it puts the page in a cross-origin isolated context, which mitigates cross-window side-channel attacks (Spectre) and unlocks high-resolution timers and SharedArrayBuffer. https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Cross-Origin-Opener-Policy

Offenders
infoSet a Cross-Origin-Resource-Policy header to limit who may embed the page.crossOriginResourcePolicyHeader

Set a Cross-Origin-Resource-Policy header (same-origin, same-site or cross-origin) on the document response to limit who may embed it.

Cross-Origin-Resource-Policy (CORP) is a per-response opt-in that tells the browser which origins are allowed to embed the resource. It blocks cross-origin or cross-site no-cors embedding (img, script, iframe, etc.) and is one of the building blocks of cross-origin isolation. https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Cross-Origin-Resource-Policy

Offenders
error(0)Serve all responses on HTTPS (when you are on HTTPS)mixedContent

You need to serve all responses on HTTPS. The page have 2 responses using HTTP. That is a privacy and security risk.

You need to make sure that if you are on HTTPS, all responses are on HTTPS so that the content served are secured.

Offenders
warn(0)Do not share user data with third parties.thirdPartyPrivacy

The page has 5% requests that are 3rd party (10 requests with a size of 764.6 kB). The page also have request to companies that harvest data from users and do not respect users privacy (see https://en.wikipedia.org/wiki/Surveillance_capitalism). The page do 2 utility requests and uses 2 utility tools. The page do 3 tag-manager requests and uses 1 tag-manager tool. The page do 9 survelliance requests and uses 5 survelliance tools. The page do 9 surveillance requests and uses 5 surveillance tools. The page do 3 social requests and uses 1 social tool. The page do 1 analytics request and uses 1 analytics tool. The page do 1 ad request and uses 1 ad tool.

Using third party requests shares user information with that third party. Please avoid that! The project https://github.com/patrickhulce/third-party-web is used to categorize first/third party requests.

Offenders
warn(90)Avoid third party cookies that is used to track the user.thirdPartyCookies

The page sets 1 third party cookie.

Third party cookies are used to track the user. They are automatically blocked in Safari and Firefox.

Offenders
  • .facebook.com

Page info

A snapshot of what the browser actually built for this page: the document, how big and deep the DOM tree is and what it kept in storage. Big, deep trees are slower to style and lay out, so the counts Chrome warns about carry a flag.

Page info

Document

What the page says it is and how large it rendered.

TitleSeedance 2.0 - AI ModelThe document title, shown in the browser tab and used by search results.
Layout viewport1350 × 690 pxThe width the page laid out at, and the full height of the rendered document.

DOM structure

How much markup the browser has to build, style and lay out.

DOM elements1,403Very large, slows layout and styleTotal HTML elements. Fewer means less for the browser to style, lay out and paint.
Avg DOM depth10How deeply elements are nested on average.
Max DOM depth16The deepest nesting on the page. Deep branches cost more style recalculation.
Iframes1Embedded documents. Each is a separate page the browser loads and renders.
Script tags70Number of script elements. More scripts usually means more main-thread work.

Storage and connection

What the page stored on the client, and the network it was tested on.

Local storage725 BData the page saved in localStorage, kept across visits.
Session storage412 BData kept in sessionStorage for this tab session only.
Connection type4GWhat the Network Information API reported for the test connection.

Resource hints

4 hints
dns-prefetch
  • https://media.xelta.ai/
preconnect
  • https://fonts.googleapis.com/
  • https://fonts.gstatic.com/
  • https://media.xelta.ai/

Technologies used to build the page

Data collected using Coach-core version 9.2.1. With updated code from Webappanalyzer 2026-05-04. Use --browsertime.firefox.includeResponseBodies html or --browsertime.chrome.includeResponseBodies html to help Wappalyzer find more information about technologies used.

Detected technologies

6 technologies

Third-party tools

16 tools

Data collected using Third Party Web version 0.29.2.

Utility
  • Cloudflare
  • Other Google APIs/SDKs
Tag-manager
  • Google Tag Manager
Survelliance
  • Google Tag Manager
  • Facebook
  • Google Analytics
  • Google/Doubleclick Ads
  • Other Google APIs/SDKs
Surveillance
  • Google Tag Manager
  • Facebook
  • Google Analytics
  • Google/Doubleclick Ads
  • Other Google APIs/SDKs
Social
  • Facebook
Analytics
  • Google Analytics
Ad
  • Google/Doubleclick Ads

Visual Metrics

Visual milestones

all times from navigation start
Speed Index1.02 show quickly the page looked done
First Visual Change0.50 sfirst paint reaches the screen
Last Visual Change4.31 sscreen stops changing · 3.81 s after first
≥99%
0.50 sFirst Visual Change
1.17 sVisual Complete 85% · Visual Complete 95%
1.34 sVisual Complete 99%
Last Visual Change4.31 s
Visual Readiness3.81 s· first to last change
01.0 s2.0 s3.0 s4.0 s
Content milestones
Perception index
Visual progress
Visual progress at 0 s0.0s
Visual progress at 1 s1.0s
Visual progress at 1.5 s1.5s
Visual progress at 2.1 s2.1s
Visual progress at 2.7 s2.7s
Visual progress at 3.3 s3.3s
Visual progress at 3.8 s3.8s
Visual progress at 4.4 s4.4s
FCP0.54s
LCP1.15s
VC851.17s
Long tasks
0.0s0.9s1.8s2.6s3.5s4.4s

Google Web Vitals

Largest Contentful Paint

When the page main content is rendered, collected via the Largest Contentful Paint API. Read more about Largest Contentful Paint.

1.152 sLCP render time

Phase breakdown

  • TTFB77 ms
  • Resource load delay394 ms
  • Resource load duration431 ms
  • Element render delay250 ms

Element

Element type
<img>
Size (w × h)
731700
URL
https://stf.xelta.ai...ta.ai/_next/image
Load time
1.055 s

DOM path

body > div#app-root > footer > img
LCP

The LCP element is highlighted in the screenshot. If nothing is highlighted the element was removed before the screenshot or the LCP API couldn't find it.

The Largest Contentful Paint API matched this image:

LCP element

Cumulative Layout Shift

How much the page's content shifts as it loads, collected via the Cumulative Layout Shift API.

0.407cumulative layout shift score

Elements that shifted

Sorted by individual shift score (higher = bigger shift). The top entries usually account for most of the page's CLS.

  • #10.407
Layout shift

Elements that shifted by more than 0.01 are highlighted in the screenshot. If an element shifted outside the viewport, it won't appear here. Check the video or filmstrip to see the shift.

Browser Metrics

Navigation Timing
Extra timings

Server timings

Timing data the server chose to expose through Server-Timing response headers on the main document — typically backend time, cache status or experiment flags.

Server timings

3 entries
NameDurationDescription
cfCacheStatus0 msHIT
cfEdge18 ms–
cfOrigin0 ms–

Custom metrics collected through JavaScript

There are no custom configured scripts.

Extra metrics collected using scripting

There are no custom extra metrics from scripting.

Chrome internal metrics (CDP)33
Audio handlers0
Audio worklet processors0
Documents2
Frames2
JS event listeners793
Layout objects1122
Media key sessions0
Media keys0
Nodes3481
Resources123
Context lifecycle state observers80
V8 per context datas3
Worker global scopes0
Uacss resources0
Rtc peer connections0
Resource fetchers2
Ad subframes0
Detached script states2
Array buffer contents7
Layout count7
Recalc style count18
Layout duration74
Recalc style duration87
Dev tools command duration11
Script duration1323
V8 compile duration4
Task duration2357
Task other duration857
Thread time2
Process time4
JS heap used size18163396
JS heap total size36200448
First meaningful paint537

PageXray

How the page is built.

HTTP versionHTTP/2.0
Total requests190
Total domains15
Transfer size2.3 MB
Content size6.3 MB
Missing compression0
Cookies81 third-party

Main document

status 200 · 0 redirects

https://stf.xelta.ai/models/video_audio_generation/seedance-2-0-video-generation

HeaderValue
age172077
alt-svch3=":443"; ma=86400
cache-controlprivate, max-age=604800, must-revalidate
cf-cache-statusHIT
cf-raya3aed8cbe98ca7df-DEL
content-encodingbr
content-security-policydefault-src 'self'; script-src 'self' 'nonce-tT5xaBOsz8v7154OP2+Uiw==' 'strict-dynamic' https:; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' https://fonts.gstatic.com data:; img-src 'self' data: blob: https:; media-src 'self' https: blob:; connect-src 'self' https: wss:; frame-src 'self' https:; frame-ancestors 'none'; object-src 'none'; base-uri 'self'; form-action 'self'
content-security-policy-report-onlydefault-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval' https:; style-src 'self' 'unsafe-inline' https:; img-src 'self' data: blob: https:; font-src 'self' data: https:; media-src 'self' data: blob: https:; connect-src 'self' https: wss:; worker-src 'self' blob:; frame-src 'self' https:; object-src 'none'; base-uri 'self'; form-action 'self' https:; frame-ancestors 'self';
content-typetext/html; charset=utf-8
dateMon, 14 Sep 2026 10:53:15 GMT
expect-ctmax-age=86400, enforce
last-modifiedSat, 12 Sep 2026 18:28:34 GMT
link</_next/static/media/47fe1b7cd6e6ed85-s.p.3bh2vc0w-r-ll.woff2>; rel=preload; as="font"; crossorigin=""; nonce="tT5xaBOsz8v7154OP2+Uiw=="; type="font/woff2", </_next/static/media/83afe278b6a6bb3c-s.p.2bn3s6zvc0dyp.woff2>; rel=preload; as="font"; crossorigin=""; nonce="tT5xaBOsz8v7154OP2+Uiw=="; type="font/woff2", </_next/static/media/8dfd6563338cbf38-s.p.2uos8jt9rp249.woff2>; rel=preload; as="font"; crossorigin=""; nonce="tT5xaBOsz8v7154OP2+Uiw=="; type="font/woff2", </_next/static/media/8e6fa89aa22d24ec-s.p.2o7m9ogm38dql.woff2>; rel=preload; as="font"; crossorigin=""; nonce="tT5xaBOsz8v7154OP2+Uiw=="; type="font/woff2", </_next/static/media/9d0c71fa164043fa-s.p.2snziqcncuet5.woff2>; rel=preload; as="font"; crossorigin=""; nonce="tT5xaBOsz8v7154OP2+Uiw=="; type="font/woff2", </_next/static/media/9e9f04e3c37952ab-s.p.0pan85mumqyf3.woff2>; rel=preload; as="font"; crossorigin=""; nonce="tT5xaBOsz8v7154OP2+Uiw=="; type="font/woff2", </_next/static/media/a218039a3287bcfd-s.p.43zbiuwnnoiok.woff2>; rel=preload; as="font"; crossorigin=""; nonce="tT5xaBOsz8v7154OP2+Uiw=="; type="font/woff2", </_next/static/media/c875c6f5d3e977ac-s.p.1h18_wedhzk4h.woff2>; rel=preload; as="font"; crossorigin=""; nonce="tT5xaBOsz8v7154OP2+Uiw=="; type="font/woff2", </_next/static/media/ce62453a442c7f35-s.p.0a0h245ktd4x0.woff2>; rel=preload; as="font"; crossorigin=""; nonce="tT5xaBOsz8v7154OP2+Uiw=="; type="font/woff2", </_next/static/media/e2334d715941921e-s.p.3o_v2fun1jzxk.woff2>; rel=preload; as="font"; crossorigin=""; nonce="tT5xaBOsz8v7154OP2+Uiw=="; type="font/woff2", </_next/static/media/e8f2fbee2754df70-s.p.1dqa_6e_ad4sj.woff2>; rel=preload; as="font"; crossorigin=""; nonce="tT5xaBOsz8v7154OP2+Uiw=="; type="font/woff2", </_next/static/chunks/1lgy-fxfy7-hi.css>; rel=preload; as="style"; nonce="tT5xaBOsz8v7154OP2+Uiw==", </_next/static/chunks/0kldb6fnstui0.css>; rel=preload; as="style"; nonce="tT5xaBOsz8v7154OP2+Uiw=="
nel{"report_to":"cf-nel","success_fraction":0.0,"max_age":604800}
permissions-policycamera=(), microphone=(self), geolocation=(), interest-cohort=()
referrer-policysame-origin strict-origin-when-cross-origin
report-to{"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=BaWWhn3sUUIjaawPii5iJxZ1iZSe9hjqO%2F1kiZN8KaMlr0P1y4A1dLQpYJDxNfg2DlxcFSYSfqz9HgW6vAAVC3DahUsKJ%2F6E8S524gfGZAj2V2n39730i%2FYocoQhpg%3D%3D"}]}
servercloudflare
server-timingcfCacheStatus;desc="HIT" cfEdge;dur=18,cfOrigin;dur=0
speculation-rules"/cdn-cgi/speculation"
strict-transport-securitymax-age=31536000; includeSubDomains; preload
varyrsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch, Accept-Encoding
x-content-type-optionsnosniff
x-frame-optionsSAMEORIGIN
x-xss-protection1; mode=block

Response codes

200
17692.6%
202
10.5%
204
52.6%
401
21.1%
404
63.2%

Largest assets on the page (by transfer size)

Top 20 of 190

Requests and sizes per content type

10 types

Transfer size2.3 MB

  • javascript67.5%
  • font13.3%
  • other6.6%
  • image6.5%
  • css3.9%
  • html1.3%
  • favicon0.41%
  • json0.36%
  • xml0.06%
  • plain0.06%

Content size6.3 MB

  • javascript77.1%
  • css10.4%
  • font4.7%
  • html3.3%
  • other2.2%
  • image2.1%
  • favicon0.13%
  • json0.04%
  • xml0.01%
  • plain0.00%

Requests182

  • other44.5%
  • javascript30.2%
  • image8.8%
  • font6.0%
  • json4.4%
  • plain3.3%
  • css1.1%
  • html0.55%
  • favicon0.55%
  • xml0.55%
ContentHeader SizeTransfer SizeContent SizeRequests
html0 b29.4 KB213.7 KB1
css0 b89.8 KB671.2 KB2
javascript0 b1.5 MB4.9 MB55
image0 b150.0 KB132.7 KB16
font0 b309.2 KB304.1 KB11
favicon0 b9.6 KB8.3 KB1
other0 b154.2 KB141.3 KB81
json0 b8.3 KB2.8 KB8
plain0 b1.4 KB2 B6
xml0 b1.5 KB737 B1
Total0 b2.3 MB6.3 MB182

Data per domain

15 domains
DomainTotal download timeTransfer SizeContent SizeRequests
stf.xelta.ai32.368 s1.5 MB4.0 MB166
static.cloudflareinsights.com132 ms10.1 KB29.6 KB1
stb.xelta.ai548 ms2.3 KB98 B4
cms-b.stg2.xelta.ai1.213 s1.1 KB69 B2
devpmt.xelta.ai725 ms746 B117 B2
www.googletagmanager.com907 ms488.2 KB1.4 MB3
connect.facebook.net394 ms247.5 KB895.2 KB2
us-assets.i.posthog.com1.055 s69 B0 b2
analytics.google.com295 msN/A0 b1
stats.g.doubleclick.net139 ms555 B0 b1
www.google.co.in216 ms408 B42 B1
mpc-prod-27-s6uit34pua-uk.a.run.app392 msN/A0 b1
us.i.posthog.com1.190 s496 B174 B1
telemetry.matchbestsoftware.online180 ms286 B2 B2
www.facebook.com146 msN/A0 b1

Expires & last-modified statistics

typeminmedianmax
Expires0 seconds4 days1 year
Last modified0 seconds2 days2 weeks

Requests loaded after onLoad event

127 requests

Includes requests done after load event end.

ContentTransfer SizeRequests
html0 b0
css0 b0
javascript1.1 MB25
image8.5 KB3
font0 b0
favicon9.6 KB1
plain1.4 KB6
other153.5 KB80
json6.3 KB7
xml1.5 KB1
Total1.3 MB127

Requests loaded after onContentLoad

127 requests

Includes requests done after DOM content loaded.

ContentTransfer SizeRequests
html0 b0
css0 b0
javascript1.1 MB25
image8.5 KB3
font0 b0
favicon9.6 KB1
plain1.4 KB6
other153.5 KB80
json6.3 KB7
xml1.5 KB1
Total1.3 MB127

Third party

Third party requests categorised by Third party web version 0.29.2.

Third-party requests19
Tools6
Categories6
Third-party cookies1

Categories

6 categories

Requests by category19

  • survelliance9 req · 5 tools47.4%
  • tag-manager3 req · 1 tool15.8%
  • social3 req · 1 tool15.8%
  • utility2 req · 2 tools10.5%
  • analytics1 req · 1 tool5.3%
  • ad1 req · 1 tool5.3%

Third party requests and tools

6 categories
utilityCloudflareOther Google APIs/SDKs2 requests · 2 tools
tag-managerGoogle Tag Manager3 requests · 1 tool
survellianceGoogle Tag ManagerFacebookGoogle Analytics+ 2 more9 requests · 5 tools
socialFacebook3 requests · 1 tool
analyticsGoogle Analytics1 requests · 1 tool
adGoogle/Doubleclick Ads1 requests · 1 tool

Unmatched third party domains

4 domains

Domains that didn't match any tool in Third party web. If you are sure they are third party domains, please do a PR to that project. You can also fine tune the list using --firstParty.

  • us-assets.i.posthog.com
  • mpc-prod-27-s6uit34pua-uk.a.run.app
  • us.i.posthog.com
  • telemetry.matchbestsoftware.online
Third party cookies1
.facebook.com1 cookie

First party vs third party

174 first · 16 third party

Transfer size2.3 MB

  • First party1.5 MB67.8%
  • Third party747.5 KB32.2%

Content size6.3 MB

  • First party4.0 MB63.0%
  • Third party2.3 MB37.0%

Requests190

  • First party17491.6%
  • Third party168.4%

First party requests and sizes per content type

174 requests

Calculated using .*xelta.* (use --firstParty to configure).

ContentHeader SizeTransfer SizeContent SizeRequests
html0 b29.4 KB213.7 KB1
css0 b89.8 KB671.2 KB2
javascript0 b822.0 KB2.5 MB49
image0 b149.6 KB132.7 KB15
font0 b309.2 KB304.1 KB11
favicon0 b9.6 KB8.3 KB1
other0 b154.2 KB141.3 KB81
json0 b8.3 KB2.8 KB7
plain0 b584 B0 b1
xml0 b1.5 KB737 B1
TotalN/A1.5 MB4.0 MB174

Third party requests and sizes per content type

16 requests
ContentHeader SizeTransfer SizeContent SizeRequests
html0 b0 b0 b0
css0 b0 b0 b0
javascript0 b745.8 KB2.3 MB6
image0 b408 B42 B1
font0 b0 b0 b0
favicon0 b0 b0 b0
plain0 b841 B2 B5
json0 b0 b0 b1
TotalN/A747.5 KB2.3 MB16