nghttp2.org
Nghttp2: HTTP/2 C Library - nghttp2.org
Last scanned Jul 21, 2026, 12:33 PM · 1 view
Overall score
Excellent
Top issues to fix
6 issues found · 1 high priority
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Multiple H1 headings found
SEOKeep a single H1 per page and demote the others to H2/H3.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
Missing OpenGraph tags
SEOAdd og:title/og:description/og:image so shared links render a proper preview card.
sitemap.xml not found
SEOPublish an XML sitemap and reference it from robots.txt to speed up page discovery.
8 broken links on the page
SEOFix or remove broken links — they waste crawl budget and erode user trust.
Summary
Nghttp2: HTTP/2 C Library Feb 16th, 2015 11:16 pm nghttp2 is an implementation of HTTP/2 and its header compression algorithm HPACK in C. This website uses jQuery hosted on AKAMAI-LINODE-AP - Akamai Connected Cloud, SG. SEO is good (75/100) and accessibility is excellent (100/100). Security scores excellent (90/100) and performance excellent (100/100). Top issue: Multiple H1 headings found.
SEO
4 issue(s) found
Performance
138 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Organization
Company details published in this site's own structured data.
Meta tags
- Title
- Nghttp2: HTTP/2 C Library - nghttp2.org
- Description
- Nghttp2: HTTP/2 C Library Feb 16th, 2015 11:16 pm nghttp2 is an implementation of HTTP/2 and its header compression algorithm HPACK in C. The …
- Canonical
- https://nghttp2.org
- Language
- en
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- AKAMAI-LINODE-AP - Akamai Connected Cloud, SG
- CDN provider
- —
- IP address
- 139.162.123.134
- ASN
- AS63949 (AKAMAI-LINODE-AP - Akamai Connected Cloud, SG)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA |
|
| MX |
|
| TXT | — |
| NS |
|
| CAA | — |
| CNAME | — |
| IPv6 support | Yes |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Let's Encrypt
- Subject
- nghttp2.org
- Valid from
- Jul 20, 2026
- Valid to
- Oct 18, 2026
- Days until expiry
- 88
- SAN domains
- nghttp2.org, www.nghttp2.org
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyMissing
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsEnabled
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: none · 0 cookie(s) observed
Content & assets
Headings
H1 3 · H2 1 · H3 0
Links
17 internal · 7 external · 8 broken
Images
0 total · 0 missing alt
Scripts / Styles
5 scripts · 3 stylesheets
JS / CSS size
106 KB · 38.2 KB
Page size
6.2 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Multiple H1 headings found
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- sitemap.xml not found
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://nghttp2.org
- Final URL
- https://nghttp2.org
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 138 ms
- HTML size
- 6.2 KB
- Redirect chain
- https://nghttp2.org
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Frequently asked questions
- What technology does nghttp2.org use?
- nghttp2.org is built with jQuery.
- Is nghttp2.org secure (HTTPS)?
- Yes. nghttp2.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 18, 2026.
- Who hosts nghttp2.org?
- nghttp2.org is hosted on AKAMAI-LINODE-AP - Akamai Connected Cloud, SG.
- What is nghttp2.org's SEO score?
- nghttp2.org scored 75/100 for SEO in the latest analysis (fair).
- What is nghttp2.org's overall website score?
- nghttp2.org has an overall SiteGraph score of 90/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card