Website readiness profile · Snapshot 23 October 2026
grammarly.com
grammarly.com's public homepage, certificate and DNS checked against 31 practices and compared with 356 Design & Content Creation sites.
- Readiness index
- 86/100
- Ahead of
- 97%
- Practices observed
- 24/31
- Popularity band
- Top 5K
Design & Content Creation median 69
of measured Design & Content Creation sites
0 of 31 could not be measured
Chrome UX Report top-sites list
Readiness by lane
Green: grammarly.com. Thin bar: Design & Content Creation peer median.
Enable
87/100
Peers 86
Harden
85/100
Peers 57
Accelerate
90/100
Peers 71
Recover
0/100
Peers 3
Priority fixes for grammarly.com
Ordered by impact and by how common each practice is among peers.
Priority 1 · Accelerate
HTTP/3 advertised
Observed: The homepage did not advertise HTTP/3 through an Alt-Svc header.
Why it matters: HTTP/3 runs over QUIC, which copes better with lossy mobile networks and recovers faster when a connection changes.
What to do: Turn on HTTP/3 at your CDN. Browsers fall back to HTTP/2 automatically, so the risk is low.
On Amazon CloudFront: Select HTTP/3 in the distribution's supported HTTP versions.
43% of Design & Content Creation peers do this. Limit: Read from the homepage response only; other pages or regions may send different headers.
Priority 2 · Harden
Certificate lifetime of 100 days or less
Observed: The certificate from Amazon had a 197-day validity period, longer than the 100-day maximum that applies from March 2027.
What to do: Move to automated issuance and renewal now, while you still have time to test it.
72% of Design & Content Creation 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.
64% of Design & Content Creation peers do this.
Priority 4 · Harden
CAA records limit who can issue certificates
Observed: No CAA record was found for grammarly.com, so any public certificate authority may issue for it.
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.
17% of Design & Content Creation peers do this.
What grammarly.com already does well
Practices fewer than half of Design & Content Creation peers use.
- security.txt publishedsecurity.txt with a contact found.9.1% of peers
- Referrer-Policy setReferrer-Policy present.26% of peers
- Content Security Policy presentContent-Security-Policy present.29% of peers
What we saw
- Homepage checked
- https://www.grammarly.com/
- Homepage response
- HTTP 200
- TLS
- TLSv1.3, HTTP/2
- Certificate
- Amazon, 197-day validity, expiring 2027-01-06
- CDN or edge
- Amazon CloudFront
- Platform or framework
- Next.js
- DNS operators
- Amazon Route 53
- HSTS
- max-age 365 days, includeSubDomains
- DMARC policy
- p=reject
- Homepage HTML
- 539 KB, gzip
- Images on homepage
- 58 (png 130, svg 39)
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 24
- HTTP requests move to HTTPS
- HSTS kept for at least a year
- TLS 1.3 negotiated
- Certificate has more than 14 days left
- 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
- 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
- Canonical URL declared
- Meta description written
- Mobile viewport configured
- Social preview image set
- Page language declared
- At most one redirect to the homepage
Own grammarly.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: grammarly.com. This profile covers configuration only.