Total
4.78 MB
42 requests
100% of total size
Screenshot captured after 2.5 s.
Claude
See the website health and performance test results for https://claude.com/, including status code, load speed, SSL, WHOIS, DNS, console logs, Chrome UX Report, resource sizes, and Pagespeed findings.
Tested on 21 Jul 2026 17:46:10.
Up
- HTTP status 200
- Response time 246 ms
- Document load time 1.53 s
- Full page load time 2.5 s
- Document size 218.74 KB
- Full page size 1.09 MB
76/100
- Mobile score 76
- Desktop score 75
Observer's Performance Suggestions
Priority actions Observer identified from this test to improve speed, reliability, and user experience.
|
3 images served larger than displayed
Error
Medium
3 images are served at intrinsic dimensions more than 120% of their display size. Worst offender is 234% of display size. Resize images to match their rendered dimensions to save bandwidth. Read more |
|
LCP image resource load is slow
Warning
High
The p75 LCP image resource load delay is 4108 ms. Optimize image delivery with a CDN, caching, or smaller formats to reduce load time. Read more |
|
Desktop performance needs improvement (75/100)
Warning
Medium
Score is below 90. Tackle the highest-impact audits to push into the green. Read more |
|
High Total Blocking Time (357 ms)
Warning
Medium
Long JavaScript tasks block the main thread, making the page feel unresponsive. Split long tasks, defer non-critical scripts, and reduce third-party JavaScript. Read more |
|
Mobile performance needs improvement (76/100)
Warning
Medium
Score is below 90. Tackle the highest-impact audits to push into the green. Read more |
|
Fewer than 75% of users have a good Largest Contentful Paint
Warning
Medium
Only 68% of real-user samples fall in the "good" bucket for Largest Contentful Paint. Read more |
|
Fewer than 75% of users have a good First Contentful Paint
Warning
Medium
Only 75% of real-user samples fall in the "good" bucket for First Contentful Paint. Read more |
|
5 render-blocking resources
Warning
Medium
More than 3 resources block initial rendering. Defer or async non-critical scripts and inline critical CSS to speed up first paint. Read more |
|
Fonts total 711 KB
Warning
Medium
Web fonts combined exceed 500 KB. Subset glyphs, drop unused weights/styles, and prefer woff2. Read more |
|
DOM depth is 16 levels
Warning
Medium
Deeply nested DOM trees increase selector matching costs and layout complexity. Flatten the markup by reducing unnecessary wrapper elements. Read more |
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23 May 2028
646 days left
13 Oct 2026
59 days left
Whois
- Registrar
- MarkMonitor, Inc.
- Created
- 24 May 1995
- Updated
- 18 Dec 2024
- Expires
- 23 May 2028
- Country
- US
- DNSSEC
- unsigned
SSL
- SSL available
- Yes
- SSL status
- valid
- Issuer
- C=US,O=Let's Encrypt,CN=YE1
- Subject
- CN=claude.com
- TLS version
- TLSv1.3
- Self-signed
- No
- Valid until
- 13 Oct 2026
DNS Records
Current DNS records returned for this domain at the time of the test.
- DNS status
- resolved
- 160.79.104.10
- 2607:6bc0::10
No records returned.
No records returned.
- isla.ns.cloudflare.com
- randy.ns.cloudflare.com
- _1pz47wz9mfanwtolhihbi5vkvpsstqc
- google-site-verification=AwCGr-gwjTBRGJCQe1RMrOskL35SCnXD7nTgRLOoi3o
- google-site-verification=QZP3DPlaFGwYlsM6Eqv3Qi30SI_tciQqxA7PcQYfDs8
- google-site-verification=dDuljHA8qYpNOjccmeFO2Lz0yzmQIy61E1zRioTNiD4
- google-site-verification=hC-6QAiwN_yMi4W3VdKF7tt48l6pVXyjXpfVZB5H274
Resource Summary
Transfer size share of the tested page split by resource type.
Media
3.64 MB
1 requests
76% of total size
Font
712.99 KB
6 requests
15% of total size
Script
343.7 KB
22 requests
7.0% of total size
Stylesheet
46.63 KB
6 requests
1.0% of total size
Document
41.61 KB
1 requests
0.9% of total size
Image
23.54 KB
3 requests
0.5% of total size
Other
2.26 KB
3 requests
0.0% of total size
Third-party
3.64 MB
3 requests
76% of total size
Total
4.78 MB
42 requests
100% of total size
Media
3.64 MB
1 requests
76% of total size
Font
712.99 KB
6 requests
15% of total size
Script
343.97 KB
22 requests
7.0% of total size
Stylesheet
46.63 KB
6 requests
1.0% of total size
Document
41.61 KB
1 requests
0.9% of total size
Image
22.91 KB
3 requests
0.5% of total size
Other
2.58 KB
3 requests
0.1% of total size
Third-party
3.64 MB
3 requests
76% of total size
Core Web Vitals
Key performance signals from Lighthouse, with color-coded status for what is healthy and what still needs work.
The server starts responding quickly.
First visible content appears quickly.
Main visible content takes too long to appear.
The layout stays visually stable while loading.
Visible content fills the page quickly.
Main thread blocking stays in a healthy range.
Potential input delay stays low.
Interactivity takes longer than recommended.
TTFB
601 ms
FCP
1.2 s
LCP
7.28 s
TTI
7.28 s
The server starts responding quickly.
First visible content appears quickly.
Main visible content loads within the recommended range.
The layout stays visually stable while loading.
Visible content fills the page quickly.
Script execution still delays interactivity.
Potential input delay may still feel sluggish.
The page becomes interactive quickly.
TTFB
161 ms
FCP
468 ms
LCP
1.75 s
TTI
1.96 s
Loading Filmstrip
Visual loading progress from the Lighthouse run, shown in time order.
Google Pagespeed Insights
Switch between desktop and mobile Lighthouse results to review the latest performance findings for this page.
Mobile
76
Desktop
75
Audit Details
| Audit | Insight | Impact |
|---|---|---|
| Reduce unused JavaScript |
Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.
|
Est savings of 43Â KiB |
| Forced reflow |
A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations. |
Open |
| Render-blocking requests |
Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.
|
Est savings of 430Â ms |
| Reduce unused CSS |
Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.
|
Est savings of 29Â KiB |
| Legacy JavaScript |
Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling
|
Est savings of 13Â KiB |
| Largest Contentful Paint |
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn more about the Largest Contentful Paint metric |
7.3Â s |
| Avoid enormous network payloads |
Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.
|
Total size was 4,894Â KiB |
| Time to Interactive |
Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric. |
7.3Â s |
| Minify JavaScript |
Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.
|
Est savings of 3Â KiB |
| Use efficient cache lifetimes |
A long cache lifetime can speed up repeat visits to your page. Learn more about caching.
|
Est savings of 5Â KiB |
Audit Details
| Audit | Insight | Impact |
|---|---|---|
| Reduce unused JavaScript |
Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.
|
Est savings of 43Â KiB |
| Forced reflow |
A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations. |
Open |
| LCP breakdown |
Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays. |
Open |
| Legacy JavaScript |
Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling
|
Est savings of 13Â KiB |
| Minify JavaScript |
Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.
|
Est savings of 3Â KiB |
| Minimize main-thread work |
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work |
2.3Â s |
| Total Blocking Time |
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more about the Total Blocking Time metric. |
360Â ms |
| Use efficient cache lifetimes |
A long cache lifetime can speed up repeat visits to your page. Learn more about caching.
|
Est savings of 5Â KiB |
| Reduce unused CSS |
Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.
|
Est savings of 29Â KiB |
| Avoid enormous network payloads |
Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.
|
Total size was 4,894Â KiB |
| Render-blocking requests |
Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.
|
Open |
| Max Potential First Input Delay |
The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric. |
210Â ms |
| Largest Contentful Paint |
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn more about the Largest Contentful Paint metric |
1.7Â s |
| Speed Index |
Speed Index shows how quickly the contents of a page are visibly populated. Learn more about the Speed Index metric. |
1.6Â s |
Browser Console Logs
Messages captured from the browser console during the real page test.
info
Connecting to 'https://claude.ai/api/billing/subscription_pricing' violates the following Content Security Policy directive: "connect-src 'self' https://a-api.anthropic.com https://a-cdn.anthropic.com https://api.anthropic.com https://cdn.sanity.io https://*.api.sanity.io https://*.apicdn.sanity.io wss://*.api.sanity.io https://links.iterable.com https://www.googletagmanager.com". The policy is report-only, so the violation has been logged but no further action has been taken.
info
Connecting to 'https://claude.ai/api/billing/subscription_pricing' violates the following Content Security Policy directive: "connect-src 'self' https://a-api.anthropic.com https://a-cdn.anthropic.com https://api.anthropic.com https://cdn.sanity.io https://*.api.sanity.io https://*.apicdn.sanity.io wss://*.api.sanity.io https://links.iterable.com https://www.googletagmanager.com". The policy is report-only, so the violation has been logged but no further action has been taken.
log
[Segment] Analytics consent not granted, skipping load
Chrome UX Report
Real-user experience shares from recent Chrome visits to this website.
Origin: https://claude.com
Mobile 21.1%
Desktop 78.9%
Tablet 0.0%
| Metric | User experience share | 75th percentile |
|---|---|---|
| LCP |
Good 67.6%
Needs improvement 14.6%
Poor 17.8%
|
3.12 s |
| INP |
Good 91.0%
Needs improvement 6.2%
Poor 2.8%
|
88 ms |
| CLS |
Good 95.3%
Needs improvement 3.2%
Poor 1.6%
|
0.01 |
| FCP |
Good 74.7%
Needs improvement 13.2%
Poor 12.1%
|
1.82 s |
| TTFB |
Good 85.8%
Needs improvement 9.4%
Poor 4.8%
|
484 ms |
Resources by Transfer Size
Largest transferred resources captured during the browser test, sorted from heaviest to lightest.
| Resource | Type | Status | Duration | Transfer size | Decoded size | Blocking |
|---|---|---|---|---|---|---|
| link | 200 | 614 ms | 171.54 KB | 171.25 KB | non-blocking | |
| link | 200 | 409 ms | 163.11 KB | 162.82 KB | non-blocking | |
| link | 200 | 311 ms | 127.12 KB | 126.82 KB | non-blocking | |
| link | 200 | 404 ms | 115.86 KB | 115.57 KB | non-blocking | |
|
claude.com
|
script | 200 | 686 ms | 74.21 KB | 220.38 KB | non-blocking |
| link | 200 | 296 ms | 69.03 KB | 68.73 KB | non-blocking | |
|
claude.com
|
script | 200 | 592 ms | 68.47 KB | 218.31 KB | non-blocking |
| link | 200 | 300 ms | 64.8 KB | 64.51 KB | non-blocking | |
|
claude.com
|
script | 200 | 603 ms | 28.9 KB | 90.23 KB | non-blocking |
|
claude.com
|
script | 200 | 509 ms | 22.54 KB | 82.66 KB | non-blocking |
|
claude.com
|
script | 200 | 597 ms | 21.26 KB | 65.69 KB | non-blocking |
|
claude.com
|
link | 200 | 102 ms | 17.03 KB | 119.94 KB | blocking |
|
claude.com
|
link | 200 | 211 ms | 15.52 KB | 111.34 KB | blocking |
|
claude.com
|
script | 200 | 607 ms | 15.05 KB | 51.21 KB | non-blocking |
|
claude.com
|
script | 200 | 493 ms | 13.03 KB | 40.78 KB | non-blocking |
|
claude.com
|
script | 200 | 611 ms | 11.74 KB | 42.2 KB | non-blocking |
|
claude.com
|
script | 200 | 608 ms | 11.43 KB | 29.57 KB | non-blocking |
|
claude.com
|
script | 200 | 611 ms | 9.8 KB | 28.9 KB | non-blocking |
|
claude.com
|
script | 200 | 593 ms | 8.99 KB | 40.61 KB | non-blocking |
|
claude.com
|
link | 200 | 620 ms | 8.99 KB | 19.88 KB | non-blocking |
|
claude.com
|
script | 200 | 594 ms | 8.53 KB | 23.21 KB | non-blocking |
|
claude.com
|
script | 200 | 603 ms | 8.52 KB | 29.96 KB | non-blocking |
|
claude.com
|
script | 200 | 594 ms | 7.57 KB | 30.05 KB | non-blocking |
|
claude.com
|
link | 200 | 620 ms | 7.47 KB | 22.44 KB | non-blocking |
|
claude.com
|
script | 200 | 594 ms | 7.36 KB | 20.69 KB | non-blocking |
|
claude.com
|
link | 200 | 106 ms | 6.28 KB | 43.79 KB | blocking |
|
claude.com
|
link | 200 | 619 ms | 6.13 KB | 13.1 KB | non-blocking |
|
claude.com
|
link | 200 | 490 ms | 5.49 KB | 15.39 KB | non-blocking |
|
claude.com
|
link | 200 | 100 ms | 5.16 KB | 43.78 KB | blocking |
|
claude.com
|
script | 200 | 608 ms | 4.84 KB | 11.09 KB | non-blocking |
| script | 200 | 594 ms | 4.24 KB | 10.03 KB | non-blocking | |
|
claude.com
|
link | 200 | 493 ms | 2.81 KB | 8.77 KB | non-blocking |
|
claude.com
|
link | 200 | 204 ms | 720 B | 999 B | non-blocking |
|
claude.com
|
script | 200 | 603 ms | 689 B | 644 B | non-blocking |
|
claude.com
|
script | 200 | 93 ms | 631 B | 436 B | non-blocking |
|
claude.com
|
script | 200 | 594 ms | 526 B | 283 B | non-blocking |
|
claude.com
|
link | 200 | 103 ms | 417 B | 237 B | blocking |
|
claude.com
|
fetch | 200 | 57 ms | 342 B | 16 B | non-blocking |
| other | 0 | 201 ms | 0 B | 0 B | non-blocking |
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