Website readiness profile · Snapshot 23 October 2026
mangadex.org
mangadex.org's public homepage, certificate and DNS checked against 31 practices and compared with 696 Literary & Knowledge sites.
- Readiness index
- 88/100
- Ahead of
- 99%
- Practices observed
- 24/29
- Popularity band
- Top 5K
Literary & Knowledge median 62
of measured Literary & Knowledge sites
2 of 31 could not be measured
Chrome UX Report top-sites list
Readiness by lane
Green: mangadex.org. Thin bar: Literary & Knowledge peer median.
Enable
77/100
Peers 78
Harden
100/100
Peers 51
Accelerate
80/100
Peers 62
Recover
0/100
Peers 6
Priority fixes for mangadex.org
Ordered by impact and by how common each practice is among peers.
Priority 1 · Accelerate
Static files cached for 30 days or more
Observed: A same-site stylesheet or script was cacheable for 1 days, short of the 30-day benchmark.
Why it matters: Returning visitors and later page views reuse cached files instead of downloading them again.
What to do: Give versioned (fingerprinted) CSS, JavaScript, fonts and images Cache-Control: public, max-age=31536000, immutable, and change the file name whenever the content changes.
49% of Literary & Knowledge peers do this. Limit: Read from the homepage response only; other pages or regions may send different headers.
Priority 2 · Enable
Canonical URL declared
Observed: The homepage did not declare a canonical URL.
What to do: Add a self-referencing canonical link to every indexable page, using the final https:// URL.
67% of Literary & Knowledge peers do this.
Priority 3 · Enable
Structured data present
Observed: The homepage had no JSON-LD structured data.
What to do: Add JSON-LD for your organization and main content types, then test it with Google's Rich Results Test.
46% of Literary & Knowledge peers do this.
Priority 4 · Enable
Reachable over IPv6
Observed: No IPv6 (AAAA) address was published for mangadex.org.
What to do: Enable IPv6 at your CDN or host and publish the AAAA record it provides.
55% of Literary & Knowledge peers do this.
What mangadex.org already does well
Practices fewer than half of Literary & Knowledge peers use.
- security.txt publishedsecurity.txt with a contact found.5% of peers
- DNSSEC signedDNSSEC delegation (DS record) present.5.7% of peers
- CAA records limit who can issue certificatesCAA limits issuance to letsencrypt.org.13% of peers
What we saw
- Homepage checked
- https://mangadex.org/
- Homepage response
- HTTP 200
- TLS
- TLSv1.3, HTTP/2
- Certificate
- Let's Encrypt, 89-day validity, expiring 2026-12-25
- DNS operators
- 1 self-run or other nameserver domain
- HSTS
- max-age 730 days, includeSubDomains, preload
- DMARC policy
- p=reject
- Homepage HTML
- 7 KB, gzip
- Images on homepage
- 1 (svg 1)
Limits: homepage only, one location, one moment. Header checks reflect the homepage response; other pages may differ.
Stack and providers
Seen in the homepage response, certificate and DNS. Provider pages compare how their customers configure the same checks.
All 31 checks
Select a gap for the method and fix. How each check works
Not observed 5
Observed 24
- HTTP requests move to HTTPS
- HSTS kept for at least a year
- TLS 1.3 negotiated
- Certificate has more than 14 days left
- Certificate lifetime of 100 days or less
- CAA records limit who can issue certificates
- DNSSEC signed
- security.txt published
- DMARC policy enforces quarantine or reject
- X-Content-Type-Options: nosniff
- Framing restricted
- Content Security Policy present
- Referrer-Policy set
- HTTP/2 negotiated
- HTTP/3 advertised
- HTML compressed
- No render-blocking scripts in <head>
- robots.txt published
- XML sitemap discoverable
- Meta description written
- Mobile viewport configured
- Social preview image set
- Page language declared
- At most one redirect to the homepage
Not measured 2
- Modern image formats in use
- Offscreen images lazy-loaded
Own mangadex.org?
Re-run the checks after a change, or verify the site in a free workspace to save reports with history, compare against similar sites and competitors, and track a private action plan. What owners get.
Live status for this site: Status Is Down: mangadex.org. This profile covers configuration only.