Run 1 summary

https://m.stripe.com/6

Tested 2026-09-16 08:23:54 using Chrome 150.0.7871.46 (runtime settings)

SummaryWaterfallMetricsRenderingCoachPageXrayThird party

Summary

Google Web Vitals

1.522 sTTFB
2.032 sLargest Contentful Paint
0.000Cumulative Layout Shift
1.615 sTotal Blocking Time

Loading

1.888 sFirst Paint
15.434 sFully Loaded
727 msMax Potential FID

Page weight & requests

2.7 MBTotal transfer size
10.0 MBTotal content size
178Requests

CPU

15Long tasks
5.893 sLast long task at

Visual progress

1.902 sFirst Visual Change
2.560 sSpeed Index
2.036 sVisual Complete 85%
10.277 sVisual Complete 99%
13.681 sLast Visual Change
Screenshot
Run 1 · after page complete

Waterfall

First paintFCPLCPDOMContentLoadedDOM interactiveLoadRender-blockingRedirectError

Rendering

Run 1
0.000 s
0s2s4s6s8s10s12s14s

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

121 frames

Use --filmstrip.showAll to show all filmstrips.

Frame at 0 ms
0 ms
0 %
Frame at 1.700 s
1.700 s
0 %
Frame at 1.900 s
1.900 s
0 %
Frame at 2.000 s
2.000 s
28 %
Frame at 2.100 s
2.100 s
93 %
Frame at 2.200 s
2.200 s
93 %
Frame at 2.300 s
2.300 s
93 %
Frame at 2.400 s
2.400 s
93 %
Frame at 2.500 s
2.500 s
93 %
Frame at 2.600 s
2.600 s
93 %
Frame at 2.700 s
2.700 s
93 %
Frame at 2.800 s
2.800 s
93 %
Frame at 2.900 s
2.900 s
93 %
Frame at 3.000 s
3.000 s
93 %
Frame at 3.100 s
3.100 s
93 %
Frame at 3.200 s
3.200 s
93 %
Frame at 3.300 s
3.300 s
93 %
Frame at 3.400 s
3.400 s
93 %
Frame at 3.500 s
3.500 s
93 %
Frame at 3.600 s
3.600 s
93 %
Frame at 3.700 s
3.700 s
93 %
Frame at 3.800 s
3.800 s
93 %
Frame at 3.900 s
3.900 s
93 %
Frame at 4.000 s
4.000 s
93 %
Frame at 4.100 s
4.100 s
93 %
Frame at 4.200 s
4.200 s
94 %
Frame at 4.300 s
4.300 s
94 %
Frame at 4.400 s
4.400 s
94 %
Frame at 4.500 s
4.500 s
93 %
Frame at 4.600 s
4.600 s
93 %
Frame at 4.700 s
4.700 s
93 %
Frame at 4.800 s
4.800 s
94 %
Frame at 4.900 s
4.900 s
93 %
Frame at 5.000 s
5.000 s
93 %
Frame at 5.100 s
5.100 s
93 %
Frame at 5.200 s
5.200 s
94 %
Frame at 5.300 s
5.300 s
94 %
Frame at 5.400 s
5.400 s
94 %
Frame at 5.500 s
5.500 s
94 %
Frame at 5.600 s
5.600 s
94 %
Frame at 5.700 s
5.700 s
94 %
Frame at 5.800 s
5.800 s
94 %
Frame at 5.900 s
5.900 s
93 %
Frame at 6.000 s
6.000 s
94 %
Frame at 6.100 s
6.100 s
94 %
Frame at 6.200 s
6.200 s
94 %
Frame at 6.300 s
6.300 s
94 %
Frame at 6.400 s
6.400 s
94 %
Frame at 6.500 s
6.500 s
94 %
Frame at 6.600 s
6.600 s
94 %
Frame at 6.700 s
6.700 s
93 %
Frame at 6.800 s
6.800 s
94 %
Frame at 6.900 s
6.900 s
93 %
Frame at 7.000 s
7.000 s
94 %
Frame at 7.100 s
7.100 s
94 %
Frame at 7.200 s
7.200 s
93 %
Frame at 7.300 s
7.300 s
94 %
Frame at 7.400 s
7.400 s
94 %
Frame at 7.500 s
7.500 s
94 %
Frame at 7.600 s
7.600 s
94 %
Frame at 7.700 s
7.700 s
94 %
Frame at 7.800 s
7.800 s
94 %
Frame at 7.900 s
7.900 s
94 %
Frame at 8.000 s
8.000 s
94 %
Frame at 8.100 s
8.100 s
94 %
Frame at 8.200 s
8.200 s
94 %
Frame at 8.300 s
8.300 s
94 %
Frame at 8.400 s
8.400 s
94 %
Frame at 8.500 s
8.500 s
94 %
Frame at 8.600 s
8.600 s
94 %
Frame at 8.700 s
8.700 s
94 %
Frame at 8.800 s
8.800 s
94 %
Frame at 8.900 s
8.900 s
94 %
Frame at 9.000 s
9.000 s
94 %
Frame at 9.100 s
9.100 s
94 %
Frame at 9.200 s
9.200 s
94 %
Frame at 9.300 s
9.300 s
94 %
Frame at 9.400 s
9.400 s
94 %
Frame at 9.500 s
9.500 s
94 %
Frame at 9.600 s
9.600 s
94 %
Frame at 9.700 s
9.700 s
94 %
Frame at 9.800 s
9.800 s
94 %
Frame at 9.900 s
9.900 s
94 %
Frame at 10.000 s
10.000 s
94 %
Frame at 10.100 s
10.100 s
94 %
Frame at 10.200 s
10.200 s
94 %
Frame at 10.300 s
10.300 s
99 %
Frame at 10.400 s
10.400 s
99 %
Frame at 10.500 s
10.500 s
99 %
Frame at 10.600 s
10.600 s
99 %
Frame at 10.700 s
10.700 s
99 %
Frame at 10.800 s
10.800 s
99 %
Frame at 10.900 s
10.900 s
99 %
Frame at 11.000 s
11.000 s
99 %
Frame at 11.100 s
11.100 s
99 %
Frame at 11.200 s
11.200 s
99 %
Frame at 11.300 s
11.300 s
99 %
Frame at 11.400 s
11.400 s
99 %
Frame at 11.500 s
11.500 s
99 %
Frame at 11.600 s
11.600 s
99 %
Frame at 11.700 s
11.700 s
99 %
Frame at 11.800 s
11.800 s
99 %
Frame at 11.900 s
11.900 s
99 %
Frame at 12.000 s
12.000 s
99 %
Frame at 12.100 s
12.100 s
99 %
Frame at 12.200 s
12.200 s
99 %
Frame at 12.300 s
12.300 s
99 %
Frame at 12.400 s
12.400 s
99 %
Frame at 12.500 s
12.500 s
99 %
Frame at 12.600 s
12.600 s
99 %
Frame at 12.700 s
12.700 s
99 %
Frame at 12.800 s
12.800 s
99 %
Frame at 12.900 s
12.900 s
99 %
Frame at 13.000 s
13.000 s
99 %
Frame at 13.100 s
13.100 s
99 %
Frame at 13.200 s
13.200 s
99 %
Frame at 13.300 s
13.300 s
99 %
Frame at 13.400 s
13.400 s
99 %
Frame at 13.500 s
13.500 s
99 %
Frame at 13.600 s
13.600 s
99 %
Frame at 13.700 s
13.700 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?

The server dominated the wait. The first byte took 1.522 s (81 % of the time to First Contentful Paint). Nothing can render before it arrives, and Google Web Vitals considers a TTFB over 800 ms in need of improvement. See the request timing on the Waterfall tab. First paint landed at 1.888 s. The largest paint followed at 2.032 s.

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

Render blocking requests

6 requests · 29.8 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
m.stripe.com · TTFB 1.522 s
844 ms
259 B843 ms
javascript · b.stripecdn.com
loaded after LCP, at 3.402 s
22.9 KB46 ms
javascript · b.stripecdn.com
loaded after LCP, at 3.403 s
3.4 KB46 ms
javascript · b.stripecdn.com
loaded after LCP, at 4.250 s
3.6 KB45 ms
javascript · b.stripecdn.com
loaded after LCP, at 3.411 s
0 b44 ms
javascript · b.stripecdn.com
loaded after LCP, at 3.411 s
0 b43 ms
javascript · b.stripecdn.com
loaded after LCP, at 4.256 s
0 b41 ms
LCP resource
wave-fallback-desktop.png — downloaded by 1.780 s, rendered at 2.032 s
253 ms
33.2 KB253 ms
web font · b.stripecdn.com
121 ms
58.0 KB121 ms
web font · b.stripecdn.com
130 ms
12.1 KB130 ms
0508 ms1.016 s1.524 sFCP 1.888 sLCP 2.032 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.

What to fix first

Performance advice

73
2 errors8 warnings5 info
infoAdd decoding="async" to non-critical imagesdecodingAsync

The page has 40 images (out of 40) without a decoding hint. Add decoding="async" to non-critical images so the browser can decode them off the main thread.

Setting decoding="async" on an <img> tells the browser it can decode the image off the main thread, which keeps the page responsive to user interactions while images are being processed. The default ("auto") leaves the choice to the browser. https://developer.mozilla.org/en-US/docs/Web/HTML/Element/img#decoding

Offenders
warn(0)Avoid CPU Long TaskslongTasks

The page has 15 CPU long tasks with the total of 2.420 s. The total blocking time is 1.615 s and 1 long task before first contentful paint with total time of 105 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
  • unknown
  • unknown
  • self
  • self
  • self
  • self
  • self
  • self
  • self
  • cross-origin-descendant
  • cross-origin-descendant
  • cross-origin-descendant
  • cross-origin-descendant
  • cross-origin-descendant
  • cross-origin-descendant
warn(0)Avoid doing redirectsassetsRedirects
warn(0)Avoid extra requests by setting cache headerscacheHeaders

The page has 40 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 69.5 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
warn(0)Avoid redirecting the main documentdocumentRedirect

The main document gets redirected 2 time(s). Remove those redirect and make the page faster!

You should never ever redirect the main document, because it will make the page load slower for the user. Well, you should redirect the user if the user tries to use HTTP and there's an HTTPS version of the page. The coach checks for that. :)

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

The total JavaScript transfer size is 2.1 MB and the uncompressed size is 8.9 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
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https://b.stripecdn.com/stripethirdparty-srv/assets/v33.1/vendors~AddressAutocom...5baebcd.bundle.js22.9 KB83.8 KB
https://b.stripecdn.com/stripethirdparty-srv/assets/v33.1/PrivacyCompliance.2a78...092c5dd.bundle.js3.4 KB7.4 KB
https://b.stripecdn.com/stripethirdparty-srv/assets/v33.1/vendors~AddressAutocom...5baebcd.bundle.js0 b83.8 KB
https://b.stripecdn.com/stripethirdparty-srv/assets/v33.1/PrivacyCompliance.2a78...092c5dd.bundle.js0 b7.4 KB
https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/40414.28902c3e57a26a21.js26.0 KB96.0 KB
https://b.stripecdn.com/stripethirdparty-srv/assets/v33.1/GoogleTagManager.d1238...67a533d.bundle.js3.6 KB8.8 KB
https://b.stripecdn.com/stripethirdparty-srv/assets/v33.1/GoogleTagManager.d1238...67a533d.bundle.js0 b8.8 KB
https://www.googletagmanager.com/gtm.js?id=GTM-WK8882T180.4 KB582.4 KB
https://www.googletagmanager.com/gtm.js?id=GTM-WK8882T0 b582.4 KB
https://www.googletagmanager.com/gtag/js?id=G-SEKFWD1C9J&cx=c&gtm=4e69e1184.5 KB568.6 KB
https://www.googletagmanager.com/gtag/js?id=AW-848119022&cx=c&gtm=4e69e1162.1 KB481.1 KB
https://munchkin.marketo.net/156/munchkin.js4.1 KB9.2 KB
https://static.ads-twitter.com/uwt.js16.7 KB59.9 KB
https://www.redditstatic.com/ads/pixel.js20.4 KB71.0 KB
https://snap.licdn.com/li.lms-analytics/insight.min.js1.7 KB3.2 KB
https://tag.flvcdn.net/lytag.js9.6 KB31.6 KB
https://s.yimg.jp/images/listing/tool/cv/ytag.js11.8 KB35.5 KB
https://bat.bing.com/bat.js15.5 KB54.0 KB
https://tag.demandbase.com/e5737616348cbfe8.min.js20.2 KB69.4 KB
https://d34r8q7sht0t9k.cloudfront.net/tag.js6.8 KB13.6 KB
https://googleads.g.doubleclick.net/pagead/viewthroughconversion/848119022/...ersion/848119022/3.2 KB6.6 KB
https://www.googletagmanager.com/gtag/destination?id=DC-10460294&cx=c&gtm=4e69e1138.9 KB397.2 KB
https://snap.licdn.com/li.lms-analytics/insight.old.min.js18.7 KB52.4 KB
https://bat.bing.com/p/action/15001149.js424 B400 B
https://px.ads.linkedin.com/collect...kedin.com/collect492 B0 b
https://js.zi-scripts.com/zi-tag.js5.7 KB19.5 KB
https://b.stripecdn.com/mkt-statics-srv/assets/imt-d87daec7750f567d6be171a0ade7565e.js18.4 KB81.6 KB
https://ws.zoominfo.com/pixel/HMDVDhZ4AOv68bhkrpOC/?iszitag=true1.8 KB3.2 KB
warn(0)Don't use private headers on static contentprivateAssets
error(50)Have a fast first contentful paintfirstContentfulPaint

First contentful paint can be improved (1.888 s). It is in the Google Web Vitals needs improvement range, slower than 1.8 seconds.

The First Contentful Paint (FCP) metric measures the time from when the page starts loading to when any part of the page content is rendered on the screen. For this metric, "content" refers to text, images (including background images), <svg> elements, or non-white <canvas> elements.

infoThe favicon should be small and cacheablefavicon

The favicon size is 15.6 kB bytes. That's quite big, can you make it smaller?

It is easy to make the favicon big but please avoid doing that, because every browser will then perform an unnecessarily large download. And make sure the cache headers are set for a long time for the favicon. It is easy to miss since it's another content type.

Offenders
warn(70)Always compress text contentcompressAssets

The page has 3 requests that are served uncompressed. You could save a lot of bytes by sending them compressed instead.

In the early days of the Internet there were browsers that didn't support compressing (gzipping) text content. They do now. Make sure you compress HTML, JSON, JavaScript, CSS and SVG. It will save bytes for the user; making the page load faster and use less bandwith.

Offenders
URLTransferContent
https://stripe.com/in188.1 KB684.8 KB
https://api.company-target.com/api/v3/ip.json...om/api/v3/ip.json2.6 KB2.2 KB
https://b.stripecdn.com/mkt-statics-srv/assets/imt-d87daec7750f567d6be171a0ade7565e.js18.4 KB81.6 KB
infoLong cache headers is goodcacheHeadersLong

The page has 20 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
infoAvoid too many fontsfewFonts

The page has 2 font requests. Do you really need them? What value does the fonts give the user?

How many fonts do you need on a page for the user to get the message? Fonts can slow down the rendering of content, try to avoid loading too many of them because worst case it can make the text invisible until they are loaded (FOIT—flash of invisible text), best case they will flicker the text content when they arrive.

Offenders
error(90)Avoid Frontend single point of failuresspof

The page has 5 requests inside of the head that can cause a SPOF (single point of failure). Load them asynchronously or move them outside of the document head.

A page can be stopped from loading in the browser if a single JavaScript, CSS, and in some cases a font, couldn't be fetched or is loading really slowly (the white screen of death). That is a scenario you really want to avoid. Never load 3rd-party components synchronously inside of the head tag.

Offenders
infoMake each CSS response smalloptimalCssSize

https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/css/e5be0f41b7fa7f3f.css size is 40.4 kB (40431) 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://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/css/e5be0f41b7fa7f3f.css39.5 KB296.4 KB
warn(95)Serve images in modern formats (AVIF, WebP)modernImageFormats

The page ships 2 images (out of 40) in JPEG/PNG/GIF without a modern alternative. Wrap them in a <picture> with a <source type="image/avif"> or "image/webp" before the legacy <img>, or serve modern formats from your image pipeline directly. AVIF and WebP usually deliver 25–50% smaller files at the same quality.

AVIF and WebP routinely deliver 25–50% smaller files than JPEG and PNG at the same perceived quality, and every browser version still under support understands at least one of them. Ship modern formats either through a <picture> element with <source type="image/avif"> / "image/webp" entries in front of the legacy <img>, or directly from a content-negotiating image pipeline that returns AVIF / WebP when the client accepts it. https://web.dev/articles/serve-images-webp

Offenders

Best practice advice

90
1 warning2 info
infoAvoid unnecessary headersunnecessaryHeaders

There are 11 responses that sets a p3p header. There are 8 responses that sets both a max-age and expires header. There are 17 responses that sets a pragma no-cache header (that is a request header). There are 1 response that sets a x-frame-options:sameorigin header. There are 164 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
warn(50)Avoid too many third party requeststhirdParty

The page do 33% requests to third party domains (58 requests and 832.7 kB). First party is 120 requests and 2 MB. The regex .*stripe.* was used to calculate first/third party requests.

Do not load most of your content from third party URLs.

infoDo not send too long headerslongHeaders

https://stripe.com/ has a header content-security-policy that is 1791 characters long. https://stripe.com/ has a header report-to that is 678 characters long. https://stripe.com/c.../enforcement-mode has a header content-security-policy that is 2212 characters long. https://stripe.com/c.../enforcement-mode has a header report-to that is 678 characters long. https://stripe.com/i.../in/notifications has a header content-security-policy that is 2212 characters long. https://stripe.com/i.../in/notifications has a header report-to that is 678 characters long. https://b.stripecdn....leTagManager.html has a header content-security-policy that is 1797 characters long. https://b.stripecdn....leTagManager.html has a header content-security-policy that is 1797 characters long. https://analytics.tw...ter.com/1/i/adsct has a header set-cookie that is 904 characters long. https://px.ads.linke...edin.com/collect/ has a header set-cookie that is 811 characters long. https://ad.doublecli...BMQ0dQ5Mw;epver=2 has a header location that is 1135 characters long. https://stripe.com/s...ttribution/imt.js has a header content-security-policy that is 2212 characters long. https://stripe.com/s...ttribution/imt.js has a header report-to that is 678 characters long. https://b.stripecdn....e171a0ade7565e.js has a header content-security-policy that is 2212 characters long. https://b.stripecdn....e171a0ade7565e.js has a header report-to that is 678 characters long. https://stripe.com/c.../enforcement-mode has a header content-security-policy that is 2212 characters long. https://stripe.com/c.../enforcement-mode has a header report-to that is 678 characters long.

Do not send response headers that are too long.

Offenders

Privacy advice

62
8 warnings5 info
infoSandbox cross-origin iframesiframeSandbox

The page embeds 4 cross-origin iframes without a sandbox attribute. Add sandbox="" with the minimum set of allow-* tokens the embed actually needs.

Adding a sandbox attribute to a cross-origin iframe restricts what the embedded page can do (script execution, form submission, top-level navigation, popups, etc.) and is one of the cheapest ways to limit the blast radius of a third-party embed. https://developer.mozilla.org/en-US/docs/Web/HTML/Element/iframe#sandbox

Offenders
warn(0)Declare a referrer policy on the documentreferrerPolicy

No <meta name="referrer"> tag was found on the page. Set a Referrer-Policy response header (preferred) or add a meta tag, for example <meta name="referrer" content="strict-origin-when-cross-origin">.

Without an explicit referrer policy the browser falls back to the user-agent default and may leak the full URL of the previous page (including query strings) to every cross-origin request. Set a Referrer-Policy response header (preferred) or a <meta name="referrer"> tag in the document. https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Referrer-Policy

warn(0)Use a strict Content-Security-Policy header to mitigate cross-site scripting (XSS) attacks.contentSecurityPolicyHeader

Set a Content-Security-Policy header to mitigate cross-site scripting attacks. You can start with a Content-Security-Policy-Report-Only header, which only reports violations rather than blocking them.

A Content-Security-Policy response header tells the browser which sources of script, style, and other content are allowed. The most effective form is a strict CSP using nonces or hashes together with strict-dynamic; the worst is a missing header, with unsafe-inline and unsafe-eval close behind. https://web.dev/articles/strict-csp

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
infoSet a NEL header so the browser reports network errors back to you.nelHeader

Set a NEL header (paired with Reporting-Endpoints) to collect connection-level error reports from the field.

The NEL (Network Error Logging) response header tells the browser to record connection-level failures (DNS, TLS, HTTP errors) and ship them to a reporting endpoint. NEL pairs with the Reporting-Endpoints / Report-To header — the page declares the endpoint group and NEL points at it. Together they give you visibility into errors that never reach your origin server. https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/NEL

Offenders
warn(0)Set a Permissions-Policy header to control which browser features the page can use.permissionsPolicyHeader

Set a Permissions-Policy header to control which browser features the page can use.

The Permissions-Policy response header (the successor to Feature-Policy) lets a site explicitly opt in or out of powerful browser features such as camera, microphone, geolocation, payment and clipboard. Setting a strict policy reduces the attack surface and limits what embedded third parties can do. https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Permissions-Policy

Offenders
warn(0)Set a referrer-policy header to make sure you do not leak user information.referrerPolicyHeader

Set a referrer-policy header to make sure you do not leak user information.

Referrer Policy is a new header that allows a site to control how much information the browser includes with navigations away from a document and should be set by all sites. https://scotthelme.co.uk/a-new-security-header-referrer-policy/.

Offenders
infoDeclare reporting endpoints so the browser can deliver Reporting-API events.reportingEndpointsHeader

Set a Reporting-Endpoints header (or the legacy Report-To header) so CSP reports, NEL data and other Reporting-API events have an endpoint to land at.

The Reporting-Endpoints response header (the successor to Report-To) names the URLs that browsers should POST reports to. Without it, CSP report-to directives, Cross-Origin-Opener-Policy reports, NEL data and other Reporting-API events have nowhere to go. The legacy Report-To header is still accepted for older Chromium versions. https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Reporting-Endpoints

Offenders
warn(0)Avoid third party cookies that is used to track the user.thirdPartyCookies

The page sets 11 third party cookies.

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

Offenders
  • t.co
  • .twitter.com
  • .doubleclick.net
  • .adsrvr.org
  • .yahoo.co.jp
  • .linkedin.com
  • .bing.com
  • .linkedin.com
  • rlcdn.com
  • zoominfo.com
  • zoominfo.com
warn(0)Do not share user data with third parties.thirdPartyPrivacy

The page has 26% requests that are 3rd party (46 requests with a size of 805.9 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 5 tag-manager requests and uses 1 tag-manager tool. The page do 7 survelliance requests and uses 2 survelliance tools. The page do 17 surveillance requests and uses 5 surveillance tools. The page do 5 analytics requests and uses 3 analytics tools. The page do 23 ad requests and uses 7 ad tools. The page do 6 social requests and uses 3 social tools. The page do 2 marketing requests and uses 1 marketing tool. The page do 5 utility requests and uses 1 utility 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(0)Set X-Content-Type-Options: nosniff to stop the browser from MIME-sniffing the response.xContentTypeOptionsHeader

Set X-Content-Type-Options: nosniff on the document response to prevent MIME-sniffing.

X-Content-Type-Options: nosniff prevents browsers from interpreting files as a different MIME type than what is declared in the Content-Type header. This blocks a class of cross-site scripting and content-type confusion attacks and should be set on every response. https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Content-Type-Options

Offenders

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.

TitleStripe | Financial Infrastructure to Grow Your RevenueThe document title, shown in the browser tab and used by search results.
Layout viewport1350 × 14423 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 elements2,851Very large, slows layout and styleTotal HTML elements. Fewer means less for the browser to style, lay out and paint.
Avg DOM depth16How deeply elements are nested on average.
Max DOM depth32Deep treeThe deepest nesting on the page. Deep branches cost more style recalculation.
Iframes4Embedded documents. Each is a separate page the browser loads and renders.
Script tags80Number 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 storage172 BData the page saved in localStorage, kept across visits.
Session storage0 bData kept in sessionStorage for this tab session only.
Connection type4GWhat the Network Information API reported for the test connection.

Resource hints

11 hints
dns-prefetch
  • https://q.stripe.com/
  • https://r.stripe.com/
  • https://images.stripeassets.com/
  • https://assets.stripeassets.com/
  • https://stripe.com/b.stripecdn.com
preconnect
  • https://q.stripe.com/
  • https://r.stripe.com/
  • https://images.stripeassets.com/
  • https://assets.stripeassets.com/
  • https://stripe.com/b.stripecdn.com
  • https://stripe.com/

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

12 technologies

Third-party tools

23 tools

Data collected using Third Party Web version 0.29.2.

Tag-manager
  • Google Tag Manager
Survelliance
  • Google Tag Manager
  • Google Analytics
Surveillance
  • Google Tag Manager
  • Other Google APIs/SDKs
  • Facebook
  • Google/Doubleclick Ads
  • Google Analytics
Analytics
  • Marketo
  • LiveRamp IdentityLink
  • Google Analytics
Ad
  • Twitter Online Conversion Tracking
  • LinkedIn Ads
  • Yahoo! JAPAN Ads
  • Bing Ads
  • IPONWEB
  • The Trade Desk
  • Google/Doubleclick Ads
Social
  • reddit
  • Facebook
  • Twitter Short URL
Marketing
  • DemandBase
Utility
  • Other Google APIs/SDKs

Visual Metrics

Visual milestones

all times from navigation start
Speed Index2.56 show quickly the page looked done
First Visual Change1.90 sfirst paint reaches the screen
Last Visual Change13.68 sscreen stops changing · 11.78 s after first
≥85%
≥99%
1.90 sFirst Visual Change · Visual Complete 85%
Visual Complete 95% · Visual Complete 99%10.24 s
Last Visual Change13.68 s
Visual Readiness11.78 s· first to last change
02.5 s5.0 s7.5 s10.0 s12.5 s
Content milestones
Perception index
Visual progress
Visual progress at 0 s0.0s
Visual progress at 3.4 s3.4s
Visual progress at 5.1 s5.1s
Visual progress at 6.8 s6.8s
Visual progress at 8.6 s8.6s
Visual progress at 10.3 s10.3s
Visual progress at 12 s12.0s
Visual progress at 13.7 s13.7s
FCP1.89s
LCP2.03s
VC852.04s
Long tasks
0.0s2.7s5.5s8.2s11.0s13.7s

Google Web Vitals

1.522 sTTFB
Needs improvement
1.888 sFCP
Needs improvement
1.615 sTBT
Poor

Largest Contentful Paint

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

2.032 sLCP render time

Phase breakdown

  • TTFB1.522 s
  • Resource load delay13 ms
  • Resource load duration254 ms
  • Element render delay243 ms

Element

Size (w × h)
603688
URL
https://images.strip...lback-desktop.png
Load time
1.807 s
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.

0.000cumulative layout shift score

No layout shifts were detected on this page.

Browser Metrics

Navigation Timing
Extra timings
TTFB1.522 s
Fully loaded15.434 s
User Timing measures
Next.js-before-hydration0 msduration 2.537 s
Next.js-hydration2.537 sduration 601 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
Documents5
Frames5
JS event listeners922
Layout objects3396
Media key sessions0
Media keys0
Nodes6441
Resources186
Context lifecycle state observers90
V8 per context datas5
Worker global scopes0
Uacss resources0
Rtc peer connections0
Resource fetchers5
Ad subframes0
Detached script states2
Array buffer contents25
Layout count204
Recalc style count1076
Layout duration232
Recalc style duration611
Dev tools command duration15
Script duration2069
V8 compile duration5
Task duration5932
Task other duration3001
Thread time6
Process time11
JS heap used size45365136
JS heap total size60317696
First meaningful paint1885

PageXray

How the page is built.

HTTP versionHTTP/2.0
Total requests178
Total domains41
Transfer size2.7 MB
Content size10.0 MB
Missing compression3
Cookies1211 third-party

Main document

status 200 · 2 redirects

https://stripe.com/in

HeaderValue
access-control-allow-credentialstrue
access-control-allow-headersContent-Type
access-control-allow-originhttps://m.stripe.network
content-length138
content-typetext/html application/json;charset=utf-8
dateWed, 16 Sep 2026 08:23:56 GMT
locationhttps://stripe.com
servernginx
strict-transport-securitymax-age=31556926; includeSubDomains; preload

Response codes

200
16089.9%
204
52.8%
302
84.5%
303
10.6%
307
42.2%

Largest assets on the page (by transfer size)

Top 20 of 178

Requests and sizes per content type

9 types

Transfer size2.7 MB

  • javascript76.9%
  • image9.9%
  • html7.1%
  • font2.6%
  • css2.4%
  • favicon0.56%
  • json0.45%
  • plain0.06%

Content size10.0 MB

  • javascript85.2%
  • html6.7%
  • css4.6%
  • image2.6%
  • font0.68%
  • favicon0.14%
  • json0.03%

Requests165

  • javascript63.6%
  • image14.5%
  • plain7.3%
  • html4.8%
  • json4.2%
  • css3.0%
  • font1.2%
  • favicon0.61%
  • other0.61%
ContentHeader SizeTransfer SizeContent SizeRequests
html0 b194.3 KB685.9 KB8
css0 b64.4 KB472.8 KB5
javascript496 B2.0 MB8.5 MB105
image1.6 KB271.0 KB262.9 KB24
font0 b70.1 KB69.1 KB2
favicon0 b15.3 KB14.7 KB1
json0 b12.3 KB2.8 KB7
plain0 b1.6 KB0 b12
other0 b0 b0 b1
Total2.1 KB2.7 MB10.0 MB165

Data per domain

41 domains
DomainTotal download timeTransfer SizeContent SizeRequests
m.stripe.com1.115 sN/A0 b1
stripe.com2.238 s196.6 KB684.8 KB6
b.stripecdn.com20.088 s1.4 MB6.1 MB96
images.stripeassets.com753 ms265.8 KB262.3 KB9
r.stripe.com588 msN/A0 b2
q.stripe.com3.856 s1.0 KB86 B5
www.googletagmanager.com1.506 s665.9 KB2.6 MB5
munchkin.marketo.net696 ms4.1 KB9.2 KB1
static.ads-twitter.com264 ms16.7 KB59.9 KB1
www.redditstatic.com217 ms20.4 KB71.0 KB1
snap.licdn.com393 ms20.4 KB55.6 KB2
tag.flvcdn.net480 ms9.6 KB31.6 KB1
s.yimg.jp812 ms11.8 KB35.5 KB1
bat.bing.com1.244 s16.3 KB54.4 KB3
tag.demandbase.com257 ms20.2 KB69.4 KB1
d34r8q7sht0t9k.cloudfront.net376 ms6.8 KB13.6 KB1
www.google.com1.511 s124 B84 B5
px.ads.linkedin.com1.406 s1.0 KB43 B4
www.facebook.com395 ms271 B0 b1
b91.yahoo.co.jp827 ms62 B42 B1
api.company-target.com375 ms2.6 KB2.2 KB1
t.co752 ms824 B86 B2
analytics.twitter.com788 ms1.1 KB86 B2
match.adsrvr.org590 msN/A0 b2
id.rlcdn.com722 msN/A0 b2
pixel-config.reddit.com195 ms257 B52 B1
alb.reddit.com326 ms666 B42 B1
googleads.g.doubleclick.net145 ms3.2 KB6.6 KB1
analytics.google.com370 msN/A0 b2
stats.g.doubleclick.net194 ms549 B0 b1
ipv4.pdscrb.com1.268 s223 B23 B1
tag-logger.demandbase.com752 ms418 B0 b1
www.linkedin.com327 msN/A0 b1
attr-td.ml-api.io478 ms340 B72 B1
apm.yahoo.co.jp721 ms695 B43 B1
ad.doubleclick.net425 msN/A0 b2
segments.company-target.com580 ms287 B26 B2
verifi.pdscrb.com1.209 s238 B42 B1
js.zi-scripts.com679 ms6.4 KB20.0 KB3
assets.stripeassets.com36 ms15.3 KB14.7 KB1
ws.zoominfo.com726 ms1.8 KB3.2 KB2

Expires & last-modified statistics

typeminmedianmax
Expires0 seconds1 year1 year
Last modified38 minutes9 hours56 years

Requests loaded after onLoad event

13 requests

Includes requests done after load event end.

ContentTransfer SizeRequests
html0 b1
css0 b0
javascript20.2 KB2
image597 B3
font0 b0
favicon15.3 KB1
other0 b1
plain0 b2
json3.6 KB2
Total39.7 KB13

Requests loaded after onContentLoad

89 requests

Includes requests done after DOM content loaded.

ContentTransfer SizeRequests
html6.2 KB7
css0 b0
javascript881.8 KB30
image141.6 KB20
font0 b0
favicon15.3 KB1
json12.3 KB7
plain1.6 KB12
other0 b1
Total1.0 MB89

Third party

Third party requests categorised by Third party web version 0.29.2.

Third-party requests63
Tools16
Categories7
Third-party cookies11

Categories

7 categories

Requests by category63

  • ad23 req · 7 tools36.5%
  • survelliance17 req · 5 tools27.0%
  • social6 req · 3 tools9.5%
  • tag-manager5 req · 1 tool7.9%
  • analytics5 req · 3 tools7.9%
  • utility5 req · 1 tool7.9%
  • marketing2 req · 1 tool3.2%

Third party requests and tools

7 categories
tag-managerGoogle Tag Manager5 requests · 1 tool
survellianceGoogle Tag ManagerOther Google APIs/SDKsFacebook+ 2 more17 requests · 5 tools
analyticsMarketoLiveRamp IdentityLinkGoogle Analytics5 requests · 3 tools
adTwitter Online Conversion TrackingLinkedIn AdsYahoo! JAPAN Ads+ 4 more23 requests · 7 tools
socialredditFacebookTwitter Short URL6 requests · 3 tools
marketingDemandBase2 requests · 1 tool
utilityOther Google APIs/SDKs5 requests · 1 tool

Unmatched third party domains

9 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.

  • tag.flvcdn.net
  • d34r8q7sht0t9k.cloudfront.net
  • b91.yahoo.co.jp
  • ipv4.pdscrb.com
  • attr-td.ml-api.io
  • apm.yahoo.co.jp
  • verifi.pdscrb.com
  • js.zi-scripts.com
  • ws.zoominfo.com
Third party cookies9
t.co1 cookie
.twitter.com1 cookie
.doubleclick.net1 cookie
.adsrvr.org1 cookie
.yahoo.co.jp1 cookie
.linkedin.com1 cookie
.bing.com1 cookie
rlcdn.com1 cookie
zoominfo.com1 cookie

First party vs third party

120 first · 58 third party

Transfer size2.7 MB

  • First party1.9 MB70.2%
  • Third party813.2 KB29.8%

Content size10.0 MB

  • First party7.0 MB70.2%
  • Third party3.0 MB29.8%

Requests178

  • First party12067.4%
  • Third party5832.6%

First party requests and sizes per content type

120 requests

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

ContentHeader SizeTransfer SizeContent SizeRequests
html0 b193.9 KB685.9 KB5
css0 b64.4 KB472.8 KB5
javascript0 b1.3 MB5.5 MB85
image0 b266.4 KB262.4 KB11
font0 b70.1 KB69.1 KB2
favicon0 b15.3 KB14.7 KB1
json0 b8.5 KB32 B3
plain0 b457 B0 b5
TotalN/A1.9 MB7.0 MB120

Third party requests and sizes per content type

58 requests
ContentHeader SizeTransfer SizeContent SizeRequests
html0 b418 B0 b3
css0 b0 b0 b0
javascript496 B803.0 KB3.0 MB20
image1.6 KB4.6 KB566 B13
font0 b0 b0 b0
favicon0 b0 b0 b0
plain0 b1.2 KB0 b7
json0 b3.9 KB2.7 KB4
other0 b0 b0 b1
Total2.5 KB813.2 KB3.0 MB58