Website readiness profile · Snapshot 23 October 2026
replit.com
replit.com's public homepage, certificate and DNS checked against 31 practices and compared with 231 Programming & Software sites.
- Readiness index
- 90/100
- Ahead of
- >99%
- Practices observed
- 26/31
- Popularity band
- Top 10K
Programming & Software median 68
of measured Programming & Software sites
0 of 31 could not be measured
Chrome UX Report top-sites list
Readiness by lane
Green: replit.com. Thin bar: Programming & Software peer median.
Enable
100/100
Peers 81
Harden
80/100
Peers 59
Accelerate
100/100
Peers 65
Recover
0/100
Peers 7
Priority fixes for replit.com
Ordered by impact and by how common each practice is among peers.
Priority 1 · Harden
CAA records limit who can issue certificates
Observed: No CAA record was found for replit.com, so any public certificate authority may issue for it.
Why it matters: CAA records tell certificate authorities which of them may issue certificates for your domain, which narrows the chance of a mistaken or fraudulent certificate.
What to do: Publish CAA records naming every CA you actually use, including the CAs your CDN uses for managed certificates. Add an iodef contact if you want reports.
On Cloudflare: Cloudflare documents which CAs its managed certificates need; include them in your CAA records.
23% of Programming & Software peers do this. Limit: Read from public DNS at the time of the check; records may have changed since.
Priority 2 · Harden
security.txt published
Observed: No valid /.well-known/security.txt with a Contact field was returned.
What to do: Publish /.well-known/security.txt with at least Contact and Expires fields, as RFC 9116 requires, and review it before it expires.
On Cloudflare: Cloudflare Security Center can serve a security.txt file for the zone.
15% of Programming & Software peers do this.
Priority 3 · Harden
DNSSEC signed
Observed: No DS record was found for replit.com at its parent zone, so its DNS answers are not DNSSEC-signed.
What to do: Enable DNSSEC at your DNS provider, then add the DS record at your registrar. Plan provider moves carefully: a stale DS record can make the domain fail to resolve.
On Cloudflare: Enable DNSSEC in DNS > Settings and add the DS record at the registrar.
12% of Programming & Software peers do this.
Guide: Website Uptime Readiness: Prepare Before Traffic Arrives
Priority 4 · Harden
Referrer-Policy set
Observed: The homepage response did not include a Referrer-Policy header.
What to do: Send Referrer-Policy: strict-origin-when-cross-origin unless you have a reason to share more.
24% of Programming & Software peers do this.
What replit.com already does well
Practices fewer than half of Programming & Software peers use.
- Content Security Policy presentContent-Security-Policy present.32% of peers
- HSTS kept for at least a yearHSTS with a 365-day max-age.40% of peers
- HTTP/3 advertisedHTTP/3 advertised.40% of peers
What we saw
- Homepage checked
- https://replit.com/
- Homepage response
- HTTP 200
- TLS
- TLSv1.3, HTTP/2
- Certificate
- Google Trust Services, 90-day validity, expiring 2026-12-09
- CDN or edge
- Cloudflare
- Platform or framework
- Next.js
- DNS operators
- Cloudflare
- HSTS
- max-age 365 days, preload
- DMARC policy
- p=reject
- Homepage HTML
- 666 KB, br
- Images on homepage
- 17 (webp 44, png 34)
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 26
- 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
- DMARC policy enforces quarantine or reject
- X-Content-Type-Options: nosniff
- Framing restricted
- Content Security Policy present
- HTTP/2 negotiated
- HTTP/3 advertised
- HTML compressed
- Static files cached for 30 days or more
- Modern image formats in use
- 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
- Structured data present
- Social preview image set
- Page language declared
- At most one redirect to the homepage
Own replit.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: replit.com. This profile covers configuration only.