Website readiness profile · Snapshot 23 October 2026
sejda.com
sejda.com's public homepage, certificate and DNS checked against 31 practices and compared with 492 Web Tools sites.
- Readiness index
- 77/100
- Ahead of
- 80%
- Practices observed
- 22/31
- Popularity band
- Top 5K
Web Tools median 67
of measured Web Tools sites
0 of 31 could not be measured
Chrome UX Report top-sites list
Readiness by lane
Green: sejda.com. Thin bar: Web Tools peer median.
Enable
85/100
Peers 84
Harden
69/100
Peers 55
Accelerate
85/100
Peers 69
Recover
0/100
Peers 6
Priority fixes for sejda.com
Ordered by impact and by how common each practice is among peers.
Priority 1 · Harden
HSTS kept for at least a year
Observed: The homepage response did not include a Strict-Transport-Security header.
Why it matters: HSTS tells browsers to use HTTPS for your host on every later visit, which removes the window where a first HTTP request can be intercepted.
What to do: Send Strict-Transport-Security on HTTPS responses. Start with a short max-age (for example 300 seconds), confirm every subdomain works over HTTPS, then raise it in steps to 31536000. Add includeSubDomains only when all subdomains are HTTPS. HSTS preload is optional and hard to undo; hstspreload.org itself does not recommend it by default.
On Cloudflare: Enable HSTS under SSL/TLS > Edge Certificates > HTTP Strict Transport Security and raise max-age gradually.
30% of Web Tools peers do this. Limit: Read from the homepage response only; other pages or regions may send different headers.
Priority 2 · Accelerate
Modern image formats in use
Observed: The homepage had 6 images and none used WebP or AVIF.
What to do: Serve WebP or AVIF with a JPEG or PNG fallback, either through an image CDN or by generating both formats at build time.
On Cloudflare: Cloudflare Polish can convert images to WebP.
37% of Web Tools peers do this.
Guide: AVIF, WebP, JPEG, and PNG: Choose the Right Image Format
Priority 3 · Enable
Social preview image set
Observed: The homepage had no og:image, so shared links may show without a preview image.
What to do: Add Open Graph tags, including og:image with a 1200 x 630 image.
66% of Web Tools peers do this.
Priority 4 · 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.
51% of Web Tools peers do this.
What sejda.com already does well
Practices fewer than half of Web Tools peers use.
- security.txt publishedsecurity.txt with a contact found.4.8% of peers
- DNSSEC signedDNSSEC delegation (DS record) present.9.3% of peers
- DMARC policy enforces quarantine or rejectDMARC policy p=reject.23% of peers
What we saw
- Homepage checked
- https://www.sejda.com/
- Homepage response
- HTTP 200
- TLS
- TLSv1.3, HTTP/2
- Certificate
- Google Trust Services, 90-day validity, expiring 2026-12-07
- CDN or edge
- Cloudflare
- DNS operators
- Cloudflare
- DMARC policy
- p=reject
- Homepage HTML
- 123 KB, gzip
- Images on homepage
- 6 (png 4, 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 9
Observed 22
- HTTP requests move to HTTPS
- TLS 1.3 negotiated
- Certificate has more than 14 days left
- Certificate lifetime of 100 days or less
- DNSSEC signed
- security.txt published
- DMARC policy enforces quarantine or reject
- Framing restricted
- HTTP/2 negotiated
- HTTP/3 advertised
- HTML compressed
- Static files cached for 30 days or more
- Offscreen images lazy-loaded
- No render-blocking scripts in <head>
- robots.txt published
- XML sitemap discoverable
- Reachable over IPv6
- Canonical URL declared
- Meta description written
- Mobile viewport configured
- Page language declared
- At most one redirect to the homepage
Own sejda.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: sejda.com. This profile covers configuration only.