What technology does caniuse.com use?

caniuse.com is built with Google Analytics, Google Ads, Nginx.

Is caniuse.com secure (HTTPS)?

Yes. caniuse.com uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 17, 2026.

Who hosts caniuse.com?

Hosting provider information for caniuse.com is not available yet.

What is caniuse.com's SEO score?

caniuse.com scored 60/100 for SEO in the latest analysis (fair).

What is caniuse.com's overall website score?

caniuse.com has an overall SiteGraph score of 80/100, combining SEO, performance, security, and accessibility.

Has caniuse.com's score changed over time?

caniuse.com's overall score has declined by 1 point (from 81 to 80) since Jul 21, 2026.

caniuse.com

Can I use... Support tables for HTML5, CSS3, etc

Last scanned Jul 29, 2026, 2:00 PM · 7 views

Overall score

Great

Summary

"Can I use" provides up-to-date browser support tables for support of front-end web technologies on desktop and mobile web browsers. This website uses Nginx. SEO is fair (60/100) and accessibility is excellent (90/100). Security scores good (75/100) and performance excellent (100/100). Top issue: Missing canonical link.

"Can I use" provides up-to-date browser support tables for support of front-end web technologies on desktop and mobile web browsers.

Top issues to fix

10 issues found · 2 high priority

Missing Content-Security-Policy header
Security
Add a CSP to control which sources can run scripts — the strongest single defense against XSS.
No H1 heading found
SEO
Add exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.
Missing X-Content-Type-Options header
Security
Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
Security
Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
Missing canonical link
SEO
Add <link rel="canonical"> so search engines know which URL variant to index.
No structured data (JSON-LD) found
SEO
Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.

+4 more issues — details in the sections below.

SEO

6 issue(s) found

100

Performance

245 ms

Security

HTTPS & header checks

Accessibility

1 issue(s) found

Score history

-1 overall since Jul 21, 2026

Overall: 80
SEO: 60
Security: 75
Performance: 100
Accessibility: 90

Organization

Company details published in this site's own structured data.

"Can I use" provides up-to-date browser support tables for support of front-end web technologies on desktop and mobile web browsers.

Meta tags

Title: Can I use... Support tables for HTML5, CSS3, etc
Description: "Can I use" provides up-to-date browser support tables for support of front-end web technologies on desktop and mobile web browsers.
Canonical
Language: en-US
Charset: utf-8
Viewport: width=device-width
Robots meta
Manifest

Technologies

Detected frameworks, languages, and tools.

Google Analytics Google Ads Nginx

Hosting & CDN

Hosting provider: —
CDN provider: —
IP address: —
ASN: —

DNS records

Type	Value
A	—
AAAA	—
MX	—
TXT	—
NS	—
CAA	—
CNAME	—
IPv6 support	No

TLS / SSL certificate

Version: TLS 1.3
Issuer: Let's Encrypt
Subject: *.caniuse.com
Valid from: Jul 19, 2026
Valid to: Oct 17, 2026
Days until expiry: 79
SAN domains: *.caniuse.com, caniuse.com

Security headers

Strict-Transport-SecurityEnabled
Content-Security-PolicyMissing
X-Frame-OptionsMissing
X-Content-Type-OptionsMissing
Referrer-PolicyMissing
Permissions-PolicyMissing

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 0 · H2 1 · H3 4

Links

17 internal · 24 external · 20 broken

Images

2 total · 0 missing alt

Scripts / Styles

8 scripts · 5 stylesheets

JS / CSS size

487 B · 0 B

Page size

18.7 KB

Robots.txt & Sitemap

robots.txt: Not found
Disallow rules: 0
sitemap.xml: Not found
URLs in sitemap: 0

SEO issues

Missing canonical link
No H1 heading found
No structured data (JSON-LD) found
Missing OpenGraph tags
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://caniuse.com
Final URL: https://caniuse.com
HTTP status: 200
HTTP version: HTTP/2
Response time: 245 ms
HTML size: 18.7 KB
Redirect chain: https://caniuse.com

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does caniuse.com use?: caniuse.com is built with Google Analytics, Google Ads, Nginx.
Is caniuse.com secure (HTTPS)?: Yes. caniuse.com uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 17, 2026.
Who hosts caniuse.com?: Hosting provider information for caniuse.com is not available yet.
What is caniuse.com's SEO score?: caniuse.com scored 60/100 for SEO in the latest analysis (fair).
What is caniuse.com's overall website score?: caniuse.com has an overall SiteGraph score of 80/100, combining SEO, performance, security, and accessibility.
Has caniuse.com's score changed over time?: caniuse.com's overall score has declined by 1 point (from 81 to 80) since Jul 21, 2026.