Website readiness profile · Snapshot 23 October 2026
readworks.org
readworks.org's public homepage, certificate and DNS checked against 31 practices and compared with 1,516 Education & Online Learning sites.
- Readiness index
- 70/100
- Ahead of
- 74%
- Practices observed
- 18/28
- Popularity band
- Top 50K
Education & Online Learning median 61
of measured Education & Online Learning sites
3 of 31 could not be measured
Chrome UX Report top-sites list
Readiness by lane
Green: readworks.org. Thin bar: Education & Online Learning peer median.
Enable
87/100
Peers 75
Harden
69/100
Peers 54
Accelerate
50/100
Peers 57
Recover
0/100
Peers 13
Priority fixes for readworks.org
Ordered by impact and by how common each practice is among peers.
Priority 1 · Accelerate
HTML compressed
Observed: The homepage HTML (166 KB) was delivered without gzip, Brotli or zstd compression.
Why it matters: Compression usually shrinks HTML several times over, so the first bytes of the page arrive sooner on slow connections.
What to do: Enable Brotli or gzip for text responses (HTML, CSS, JavaScript, JSON, SVG) at the CDN or origin.
90% of Education & Online Learning peers do this. Limit: Read from the homepage response only; other pages or regions may send different headers.
Guide: How to Set a Website Performance Budget That Teams Can Keep
Priority 2 · Harden
DMARC policy enforces quarantine or reject
Observed: The DMARC policy for readworks.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.
36% of Education & Online Learning peers do this.
Priority 3 · Harden
Certificate lifetime of 100 days or less
Observed: The certificate from Amazon had a 394-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.
60% of Education & Online Learning 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.
25% of Education & Online Learning peers do this.
What readworks.org already does well
Practices fewer than half of Education & Online Learning peers use.
- Content Security Policy presentContent-Security-Policy present.25% of peers
- Referrer-Policy setReferrer-Policy present.27% of peers
- HSTS kept for at least a yearHSTS with a 730-day max-age covering subdomains.34% of peers
What we saw
- Homepage checked
- https://www.readworks.org/
- Homepage response
- HTTP 200
- TLS
- TLSv1.3, HTTP/2
- Certificate
- Amazon, 394-day validity, expiring 2027-03-10
- DNS operators
- Amazon Route 53
- HSTS
- max-age 730 days, includeSubDomains, preload
- DMARC policy
- p=none
- Homepage HTML
- 166 KB, uncompressed
- 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 10
Observed 18
- HTTP requests move to HTTPS
- HSTS kept for at least a year
- TLS 1.3 negotiated
- Certificate has more than 14 days left
- X-Content-Type-Options: nosniff
- Framing restricted
- Content Security Policy present
- Referrer-Policy set
- HTTP/2 negotiated
- 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
Not measured 3
- Static files cached for 30 days or more
- Modern image formats in use
- Offscreen images lazy-loaded
Own readworks.org?
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Live status for this site: Status Is Down: readworks.org. This profile covers configuration only.