html5rocks.com
web.dev
Last scanned Jul 26, 2026, 5:18 AM
Overall score
Excellent
Summary
Guidance to build modern web experiences that work in every browser. This website uses Google Analytics hosted on Google Cloud. SEO is excellent (90/100) and accessibility is excellent (90/100). Security scores excellent (90/100) and performance excellent (90/100). Top issue: No H1 heading found.
web.dev
Guidance to build modern web experiences that work in every browser.
- United States
- Hosted on Google Cloud
Top issues to fix
2 issues found · 1 high priority
No H1 heading found
SEOAdd exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
SEO
1 issue(s) found
Performance
1.20 s
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Organization
Company details published in this site's own structured data.
Meta tags
- Title
- web.dev
- Description
- Guidance to build modern web experiences that work in every browser.
- Canonical
- https://web.dev/
- Language
- en
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- Manifest
- https://web.dev/_pwa/web/manifest.json
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- Google Cloud
- CDN provider
- —
- IP address
- 216.239.32.27
- ASN
- AS15169 (GOOGLE - Google LLC, US)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA |
|
| MX | — |
| TXT |
|
| NS |
|
| CAA |
|
| CNAME | — |
| IPv6 support | Yes |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Google Trust Services
- Subject
- devsite-sni.developers.google.com
- Valid from
- Jun 29, 2026
- Valid to
- Sep 21, 2026
- Days until expiry
- 56
- SAN domains
- devsite-sni.developers.google.com, docs.actifio.com, d.actifio.com, apigee.com, *.apigee.com, appdefensealliance.dev, *.appdefensealliance.dev, bazel.build, *.bazel.build, builders.google, *.builders.google, cel.dev, *.cel.dev, deepmind.google.com, *.deepmind.google.com, developer.nest.com, developers.nest.com, devsitetest.how, *.devsitetest.how, fuchsia.dev, *.fuchsia.dev, issues.fuchsia.dev, *.issues.fuchsia.dev, generativeai.google, *.generativeai.google, *.generativeai.google.com, google.dev, ai.google.dev, www.ai.google.dev, *.google.dev, intrinsic.ai, *.intrinsic.ai, jibemobile.com, *.jibemobile.com, learn.mapsplatform.google.com, *.learn.mapsplatform.google.com, onboarding.off.goog, *.onboarding.off.goog, openthread.io, *.openthread.io, openweave.io, *.openweave.io, openxla.org, *.openxla.org, preview.source.android.com, privacysandbox.google.com, *.privacysandbox.google.com, quantumai.google, *.quantumai.google, tensorflow.org, *.tensorflow.org, web.dev, *.web.dev, webrtc.org, www.webrtc.org, wing.com, *.wing.com, wing.dev, *.wing.dev, devsite.google, *.devsite.google, mediapipe.dev, *.mediapipe.dev, ai.dev, *.ai.dev, ai.studio, *.ai.studio, app.new, *.app.new, chat.new, *.chat.new, bot.new, *.bot.new, agent.new, *.agent.new, ai.app, *.ai.app
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyEnabled
- X-Frame-OptionsMissing
- X-Content-Type-OptionsEnabled
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 0 · H2 9 · H3 40
Links
50 internal · 12 external · 0 broken
Images
10 total · 0 missing alt
Scripts / Styles
3 scripts · 4 stylesheets
JS / CSS size
7.0 KB · 1.0 KB
Page size
131 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 0
- sitemap.xml
- Found
- URLs in sitemap
- -1
SEO issues
- No H1 heading found
Accessibility issues
- No H1 heading found
Scan details
- Requested URL
- https://html5rocks.com
- Final URL
- https://web.dev/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 1.19 s
- HTML size
- 131 KB
- Redirect chain
- https://html5rocks.com → https://web.dev/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does html5rocks.com use?
- html5rocks.com is built with Google Analytics.
- Is html5rocks.com secure (HTTPS)?
- Yes. html5rocks.com uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Sep 21, 2026.
- Who hosts html5rocks.com?
- html5rocks.com is hosted on Google Cloud.
- What is html5rocks.com's SEO score?
- html5rocks.com scored 90/100 for SEO in the latest analysis (excellent).
- What is html5rocks.com's overall website score?
- html5rocks.com has an overall SiteGraph score of 90/100, combining SEO, performance, security, and accessibility.
- What company operates html5rocks.com?
- html5rocks.com is operated by web.dev. Guidance to build modern web experiences that work in every browser.
OpenGraph & Twitter Card
OpenGraph
Twitter Card