Website readiness profile · Snapshot 23 October 2026
sinonim.org
sinonim.org's public homepage, certificate and DNS checked against 31 practices and compared with 94 Generative AI Chatbots & Assistants sites.
- Readiness index
- 68/100
- Ahead of
- 30%
- Practices observed
- 16/26
- Popularity band
- Top 10K
Generative AI Chatbots & Assistants median 73
of measured Generative AI Chatbots & Assistants sites
5 of 31 could not be measured
Chrome UX Report top-sites list
Readiness by lane
Green: sinonim.org. Thin bar: Generative AI Chatbots & Assistants peer median.
Enable
76/100
Peers 89
Harden
65/100
Peers 62
Accelerate
63/100
Peers 77
Recover
100/100
Peers 4
Priority fixes for sinonim.org
Ordered by impact and by how common each practice is among peers.
Priority 1 · Accelerate
HTTP/2 negotiated
Observed: The TLS handshake selected http/1.1 instead of HTTP/2.
Why it matters: HTTP/2 sends many files over one connection, which speeds up pages with lots of images, styles and scripts.
What to do: Enable HTTP/2 on your CDN or server. Most CDNs do this by default.
97% of Generative AI Chatbots & Assistants peers do this. Limit: Certificate and protocol were observed from one vantage point; CDNs can present different certificates by region.
Priority 2 · Harden
DMARC policy enforces quarantine or reject
Observed: The DMARC policy for sinonim.org was p=none, which asks receivers to take no action on failing mail.
What to do: Publish DMARC with p=none and a reporting address first, fix any legitimate senders that fail SPF or DKIM alignment, then move to quarantine and finally reject.
41% of Generative AI Chatbots & Assistants peers do this.
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.
80% of Generative AI Chatbots & Assistants peers do this.
Priority 4 · 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.
37% of Generative AI Chatbots & Assistants peers do this.
What sinonim.org already does well
Practices fewer than half of Generative AI Chatbots & Assistants peers use.
- Nameservers spread across providersNameservers spread across more than one operator.4.3% of peers
- Content Security Policy presentContent-Security-Policy present.40% of peers
- No render-blocking scripts in <head>Head scripts load without blocking.44% of peers
What we saw
- Homepage checked
- https://sinonim.org/
- Homepage response
- HTTP 200
- TLS
- TLSv1.3, http/1.1
- Certificate
- Let's Encrypt, 89-day validity, expiring 2026-12-07
- DNS operators
- 4 self-run or other nameserver domains
- HSTS
- max-age 365 days
- DMARC policy
- p=none
- Homepage HTML
- 79 KB, gzip
- Images on homepage
- 2 (png 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 10
Observed 16
- 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
- Framing restricted
- Content Security Policy present
- HTML compressed
- Static files cached for 30 days or more
- No render-blocking scripts in <head>
- robots.txt published
- Canonical URL declared
- Meta description written
- Mobile viewport configured
- Page language declared
- At most one redirect to the homepage
- Nameservers spread across providers
Not measured 5
- HTTP requests move to HTTPS
- security.txt published
- Modern image formats in use
- Offscreen images lazy-loaded
- XML sitemap discoverable
Own sinonim.org?
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Live status for this site: Status Is Down: sinonim.org. This profile covers configuration only.