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jestjs.io

Jest · 🃏 Delightful JavaScript Testing

Last scanned Jul 26, 2026, 5:47 AM · 1 view

77

Overall score

Fair

Summary

This website uses Google Analytics behind Cloudflare CDN. SEO is fair (60/100) and accessibility is good (75/100). Security scores good (75/100) and performance excellent (100/100). Top issue: Missing meta description.

Top issues to fix

10 issues found · 3 high priority

  • Missing Content-Security-Policy header

    Security

    Add a CSP to control which sources can run scripts — the strongest single defense against XSS.

  • Missing meta description

    SEO

    Add a ~150-character meta description to control your search-result snippet and lift click-through rate.

  • No H1 heading found

    SEO

    Add exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.

  • Missing X-Content-Type-Options header

    Security

    Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.

  • Missing X-Frame-Options header

    Security

    Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.

  • No structured data (JSON-LD) found

    SEO

    Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.

+4 more issues — details in the sections below.

60

SEO

5 issue(s) found

100

Performance

175 ms

75

Security

HTTPS & header checks

75

Accessibility

2 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Organization

Company details published in this site's own structured data.

X (Twitter)YouTubeX (Twitter)

Meta tags

Title
Jest · 🃏 Delightful JavaScript Testing
Description
Canonical
https://jestjs.io/
Language
en
Charset
UTF-8
Viewport
width=device-width,initial-scale=1
Robots meta
Manifest
https://jestjs.io/manifest.json

OpenGraph & Twitter Card

OpenGraph

og:title
Jest
og:description
—
og:type
—
og:url
https://jestjs.io/

Twitter Card

twitter:card
summary_large_image
twitter:title
—
twitter:description
—

Technologies

Detected frameworks, languages, and tools.

Google Analytics

Hosting & CDN

Hosting provider
—
CDN provider
Cloudflare
IP address
—
ASN
—

DNS records

TypeValue
A—
AAAA—
MX—
TXT—
NS—
CAA—
CNAME—
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.3
Issuer
Google Trust Services
Subject
jestjs.io
Valid from
Jun 30, 2026
Valid to
Sep 28, 2026
Days until expiry
61
SAN domains
jestjs.io, *.jestjs.io

Security headers

  • Strict-Transport-SecurityEnabled
  • Content-Security-PolicyMissing
  • X-Frame-OptionsMissing
  • X-Content-Type-OptionsMissing
  • Referrer-PolicyMissing
  • Permissions-PolicyMissing

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 0 · H2 12 · H3 2

Links

21 internal · 52 external · 20 broken

Images

16 total · 4 missing alt

Scripts / Styles

6 scripts · 1 stylesheets

JS / CSS size

2.0 KB · 0 B

Page size

39.8 KB

Robots.txt & Sitemap

robots.txt
Not found
Disallow rules
0
sitemap.xml
Not found
URLs in sitemap
0

SEO issues

  • Missing meta description
  • No H1 heading found
  • No structured data (JSON-LD) found
  • robots.txt not found
  • sitemap.xml not found

Accessibility issues

  • More than 20% of images are missing alt text
  • No H1 heading found

Scan details

Requested URL
https://jestjs.io
Final URL
https://jestjs.io
HTTP status
200
HTTP version
HTTP/2
Response time
175 ms
HTML size
39.8 KB
Redirect chain
https://jestjs.io

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Frequently asked questions

What technology does jestjs.io use?
jestjs.io is built with Google Analytics.
Is jestjs.io secure (HTTPS)?
Yes. jestjs.io uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Sep 28, 2026.
Who hosts jestjs.io?
Hosting provider information for jestjs.io is not available yet.
What is jestjs.io's SEO score?
jestjs.io scored 60/100 for SEO in the latest analysis (fair).
What is jestjs.io's overall website score?
jestjs.io has an overall SiteGraph score of 77/100, combining SEO, performance, security, and accessibility.