Website readiness profile · Snapshot 23 October 2026
tumblr.com
tumblr.com's public homepage, certificate and DNS checked against 31 practices and compared with 193 Social Media & Networking sites.
- Readiness index
- 86/100
- Ahead of
- 97%
- Practices observed
- 22/29
- Popularity band
- Top 5K
Social Media & Networking median 63
of measured Social Media & Networking sites
2 of 31 could not be measured
Chrome UX Report top-sites list
Readiness by lane
Green: tumblr.com. Thin bar: Social Media & Networking peer median.
Enable
79/100
Peers 76
Harden
92/100
Peers 56
Accelerate
87/100
Peers 62
Recover
0/100
Peers 5
Priority fixes for tumblr.com
Ordered by impact and by how common each practice is among peers.
Priority 1 · Enable
Social preview image set
Observed: The homepage had no og:image, so shared links may show without a preview image.
Why it matters: When your link is shared in chat apps and social networks, the preview image is what people see first.
What to do: Add Open Graph tags, including og:image with a 1200 x 630 image.
64% of Social Media & Networking peers do this. Limit: Based on the homepage HTML delivered to an automated client; scripts that run later were not executed.
Priority 2 · Accelerate
HTTP/3 advertised
Observed: The homepage did not advertise HTTP/3 through an Alt-Svc header.
What to do: Turn on HTTP/3 at your CDN. Browsers fall back to HTTP/2 automatically, so the risk is low.
35% of Social Media & Networking 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.
38% of Social Media & Networking peers do this.
Priority 4 · Enable
Reachable over IPv6
Observed: No IPv6 (AAAA) address was published for www.tumblr.com.
What to do: Enable IPv6 at your CDN or host and publish the AAAA record it provides.
47% of Social Media & Networking peers do this.
What tumblr.com already does well
Practices fewer than half of Social Media & Networking peers use.
- CAA records limit who can issue certificatesCAA limits issuance to comodoca.com, digicert.com, letsencrypt.org and others.11% of peers
- security.txt publishedsecurity.txt with a contact found.13% of peers
- Content Security Policy presentContent-Security-Policy present.28% of peers
What we saw
- Homepage checked
- https://www.tumblr.com/
- Homepage response
- HTTP 200
- TLS
- TLSv1.3, HTTP/2
- Certificate
- Let's Encrypt, 89-day validity, expiring 2026-12-06
- Platform or framework
- WordPress
- DNS operators
- 1 self-run or other nameserver domain
- HSTS
- max-age 365 days, preload
- DMARC policy
- p=quarantine
- Homepage HTML
- 114 KB, br
- Images on homepage
- 0
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 7
Observed 22
- 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
- security.txt published
- DMARC policy enforces quarantine or reject
- X-Content-Type-Options: nosniff
- Framing restricted
- Content Security Policy present
- HTTP/2 negotiated
- HTML compressed
- Static files cached for 30 days or more
- No render-blocking scripts in <head>
- robots.txt published
- XML sitemap discoverable
- Canonical URL declared
- Meta description written
- Mobile viewport configured
- Page language declared
- At most one redirect to the homepage
Not measured 2
- Modern image formats in use
- Offscreen images lazy-loaded
Own tumblr.com?
Re-run the checks after a change, keep a private action plan in a free workspace, or report a mistake.
Live status for this site: Status Is Down: tumblr.com. This profile covers configuration only.