Total
11.86 MB
71 requests
100% of total size
Final URL differs from the requested URL
Observer followed one or more redirects before reaching the final URL.
https://www.claude.com/
https://claude.com/
SSL certificate expires soon
The SSL certificate is due to expire on 17 Jun 2026.
Screenshot captured after 5.88 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 3 May 2026 00:15:02.
Up
- HTTP status 200
- Response time 434 ms
- Document load time 4.97 s
- Full page load time 5.88 s
- Document size 916.08 KB
- Full page size 130.72 KB
32/100
- Mobile score 32
- Desktop score 50
Observer's Performance Suggestions
Priority actions Observer identified from this test to improve speed, reliability, and user experience.
Poor mobile performance score (32/100)
Error
High Lighthouse rates this page as poor. Address render-blocking, image, and JavaScript audits below. Read more |
Missing clickjacking protection
Error
High The page has neither an X-Frame-Options header nor a CSP frame-ancestors directive, so it can be embedded in an iframe on any site, making it vulnerable to clickjacking attacks. Read more |
No H1 element found
Error
Low The page is missing an <h1> tag. An H1 heading helps search engines and screen readers understand the primary topic of the page. Read more |
High Total Blocking Time (1471 ms)
Warning
High 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 |
High Total Blocking Time (1144 ms)
Warning
High 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 |
Slow Speed Index (11.1 s)
Warning
High The page takes too long to visually complete. Optimize critical rendering path, reduce render-blocking resources, and serve visible content first. Read more |
LCP image resource load is slow
Warning
High The p75 LCP image resource load delay is 3976 ms. Optimize image delivery with a CDN, caching, or smaller formats to reduce load time. Read more |
9 slow third-party resources
Warning
High 9 third-party resources took longer than 1 second to load. Slowest: https://assets.claude.ai/videos/cowork-login-hero.mp4 at 3643 ms. Consider self-hosting critical assets or lazy-loading non-essential ones. Read more |
1 resource returned errors
Warning
High Sub-resources returned 4xx or 5xx status codes. Broken scripts, stylesheets, or images can degrade functionality and user experience. Read more |
Redirects from www.claude.com to claude.com
Warning
Medium The www and non-www versions resolve to different hosts, causing an extra redirect. Pick one canonical form and redirect the other permanently. Read more |
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23 May 2028
733 days left
17 Jun 2026
28 days left
Whois
- Registrar
- MarkMonitor, Inc.
- Created
- 24 May 1995
- Updated
- 18 Dec 2024
- Expires
- 23 May 2028
- Country
- US
- DNSSEC
- unsigned
SSL
- Issuer
- C=US,O=Let's Encrypt,CN=E7
- Subject
- CN=claude.com
- TLS version
- TLSv1.3
- Self-signed
- No
- Valid until
- 17 Jun 2026
DNS Records
Current DNS records returned for this domain at the time of the test.
- 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
7.39 MB
2 requests
62% of total size
Script
3.66 MB
44 requests
31% of total size
Document
427.09 KB
2 requests
3.5% of total size
Font
277.79 KB
2 requests
2.3% of total size
Stylesheet
82.24 KB
6 requests
0.7% of total size
Other
36.6 KB
13 requests
0.3% of total size
Image
2.21 KB
2 requests
0.0% of total size
Third-party
7.66 MB
65 requests
65% of total size
Total
10.73 MB
69 requests
100% of total size
Media
6.27 MB
2 requests
58% of total size
Script
3.66 MB
43 requests
34% of total size
Document
427.09 KB
2 requests
3.9% of total size
Font
277.79 KB
2 requests
2.5% of total size
Stylesheet
80.96 KB
5 requests
0.7% of total size
Other
35.52 KB
14 requests
0.3% of total size
Image
412 B
1 requests
0.0% of total size
Third-party
10.29 MB
65 requests
96% 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.
Users wait too long before any content appears.
Main visible content takes too long to appear.
The layout stays visually stable while loading.
Visual loading is significantly delayed.
Heavy blocking is likely hurting responsiveness.
Potential input delay is high.
Users wait too long before the page responds.
TTFB
604 ms
FCP
8.56 s
LCP
10.06 s
TTI
25.85 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.
Heavy blocking is likely hurting responsiveness.
Potential input delay is high.
Interactivity takes longer than recommended.
TTFB
166 ms
FCP
1.57 s
LCP
1.85 s
TTI
5.35 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
32
Desktop
50
Audit Details
| Audit | Insight | Impact |
|---|---|---|
| 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 | 5.6 s |
| First Contentful Paint | First Contentful Paint marks the time at which the first text or image is painted. Learn more about the First Contentful Paint metric. | 8.6 s |
| 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 | 10.1 s |
| Reduce JavaScript execution time | Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.
| 3.3 s |
| 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 540 ms |
| 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 |
| 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. | 25.9 s |
| 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 69 KiB |
| 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 2,603 KiB |
| Network dependency tree | Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load. | 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. | 700 ms |
| Speed Index | Speed Index shows how quickly the contents of a page are visibly populated. Learn more about the Speed Index metric. | 11.1 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. | 1,140 ms |
| Use efficient cache lifetimes | A long cache lifetime can speed up repeat visits to your page. Learn more about caching.
| Est savings of 3,019 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 12,144 KiB |
Audit Details
| Audit | Insight | Impact |
|---|---|---|
| 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 69 KiB |
| Reduce JavaScript execution time | Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.
| 2.7 s |
| 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 70 ms |
| 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 | 4.5 s |
| Network dependency tree | Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load. | Open |
| 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 |
| 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 2,601 KiB |
| 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. | 1,470 ms |
| 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. | 650 ms |
| Speed Index | Speed Index shows how quickly the contents of a page are visibly populated. Learn more about the Speed Index metric. | 3.3 s |
| 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. | 5.4 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 10,992 KiB |
| Use efficient cache lifetimes | A long cache lifetime can speed up repeat visits to your page. Learn more about caching.
| Est savings of 3,018 KiB |
| First Contentful Paint | First Contentful Paint marks the time at which the first text or image is painted. Learn more about the First Contentful Paint metric. | 1.6 s |
| 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 | 1.8 s |
Browser Console Logs
Messages captured from the browser console during the real page test.
error
Failed to load resource: net::ERR_BLOCKED_BY_RESPONSE.NotSameOrigin
error
Framing 'https://a.claude.ai/' violates the following Content Security Policy directive: "frame-ancestors https://claude.ai https://*.claude.ai https://anthropic.com https://*.anthropic.com https://*.ant.dev". The request has been blocked.
info
[O11Y] [DatadogRUM] Initialized [object Object]
error
Failed to find a valid digest in the 'integrity' attribute for resource 'https://a-cdn.claude.ai/v2/EEA5F558-D6AC-4C03-B678-AABF639EE69A/api.js' with computed SHA-384 integrity 'ByQxrkVQSxJEATXOn8qROX+T9HADRG9dpVnwWJL10zPtcO9KLHoIFfUHStIoPWG0'. The resource has been blocked.
error
Failed to load resource: the server responded with a status of 404 ()
warn
[bootstrap] Eager fetch failed: Bootstrap request failed: 404
error
[REACT_QUERY_CLIENT] QueryClient error: Error: Eager bootstrap returned no data (logged out)
warn
It's possible that you are loading beacon script multiple times. Please, check your code.
warn
[Intercom] The App ID in your code snippet has not been set. Set it to your App ID found in settings to complete installation: https://app.intercom.com/a/apps/_/settings/web
warn
[GSI_LOGGER]: google.accounts.id.initialize() is called multiple times. This could cause unexpected behavior and only the last initialized instance will be used.
error
Not signed in with the identity provider.
warn
[GSI_LOGGER]: google.accounts.id.initialize() is called multiple times. This could cause unexpected behavior and only the last initialized instance will be used.
error
[GSI_LOGGER]: FedCM get() rejects with NotAllowedError: Only one navigator.credentials.get request may be outstanding at one time.
error
Only one navigator.credentials.get request may be outstanding at one time.
error
Only one navigator.credentials.get request may be outstanding at one time.
error
[GSI_LOGGER]: FedCM get() rejects with NotAllowedError: Only one navigator.credentials.get request may be outstanding at one time.
error
[GSI_LOGGER]: FedCM get() rejects with NetworkError: Error retrieving a token.Chrome UX Report
Real-user experience shares from recent Chrome visits to this website.
Origin: https://claude.com
Mobile 16.1%
Desktop 83.9%
Tablet 0.0%
| Metric | User experience share | 75th percentile |
|---|---|---|
| LCP |
Good 72.4%
Needs improvement 11.9%
Poor 15.7% | 2.72 s |
| INP |
Good 90.4%
Needs improvement 6.3%
Poor 3.3% | 89 ms |
| CLS |
Good 95.3%
Needs improvement 2.8%
Poor 1.9% | 0.01 |
| FCP |
Good 79.6%
Needs improvement 9.5%
Poor 10.9% | 1.54 s |
| TTFB |
Good 86.7%
Needs improvement 6.5%
Poor 6.8% | 429 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 |
|---|---|---|---|---|---|---|
a-cdn.claude.ai | script | 200 | 492 ms | 94.74 KB | 287.97 KB | non-blocking |
| fetch | 404 | 69 ms | 20 KB | 74.82 KB | non-blocking | |
claude.com | other | 200 | 37 ms | 8.32 KB | 8.03 KB | non-blocking |
claude.com | other | 200 | 56 ms | 3.54 KB | 14.73 KB | non-blocking |
claude.com | other | 200 | 35 ms | 3.54 KB | 14.73 KB | non-blocking |
claude.com | link | 200 | 281 ms | 593 B | 529 B | non-blocking |
assets-proxy.anthropic.com | link | 200 | 127 ms | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | link | 200 | 200 ms | 0 B | 0 B | non-blocking |
widget.intercom.io | script | 0 | 1.41 s | 0 B | 0 B | non-blocking |
a-cdn.anthropic.com | script | 0 | 1.6 s | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | script | 200 | 702 ms | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | other | 200 | 304 ms | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | other | 200 | 218 ms | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | link | 200 | 106 ms | 0 B | 0 B | blocking |
assets-proxy.anthropic.com | other | 200 | 219 ms | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | other | 200 | 296 ms | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | other | 200 | 297 ms | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | other | 200 | 297 ms | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | other | 200 | 301 ms | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | other | 200 | 700 ms | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | other | 200 | 702 ms | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | other | 200 | 706 ms | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | other | 200 | 707 ms | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | other | 200 | 708 ms | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | other | 200 | 715 ms | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | other | 200 | 718 ms | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | link | 200 | 107 ms | 0 B | 0 B | blocking |
assets-proxy.anthropic.com | other | 200 | 790 ms | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | other | 200 | 794 ms | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | other | 200 | 799 ms | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | other | 200 | 801 ms | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | other | 200 | 892 ms | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | other | 200 | 895 ms | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | other | 200 | 895 ms | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | other | 200 | 899 ms | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | other | 200 | 903 ms | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | other | 200 | 909 ms | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | other | 200 | 909 ms | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | other | 200 | 912 ms | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | other | 200 | 913 ms | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | link | 200 | 106 ms | 0 B | 0 B | blocking |
assets-proxy.anthropic.com | link | 200 | 106 ms | 0 B | 0 B | blocking |
assets-proxy.anthropic.com | other | 200 | 919 ms | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | other | 200 | 1.01 s | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | other | 200 | 1.01 s | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | other | 200 | 1.01 s | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | other | 200 | 1.01 s | 0 B | 0 B | non-blocking |
assets-proxy.anthropic.com | other | 200 | 1.01 s | 0 B | 0 B | non-blocking |
accounts.google.com | link | 0 | 291 ms | 0 B | 0 B | blocking |
claude.ai | link | 0 | 320 ms | 0 B | 0 B | non-blocking |
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