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crystal-lang.org

The Crystal Programming Language

Last scanned Jul 26, 2026, 1:49 PM

87

Overall score

Great

Summary

Crystal is a general-purpose, object-oriented programming language. This website uses Google Analytics behind CloudFront CDN. SEO is good (85/100) and accessibility is excellent (100/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Meta description longer than 160 characters.

Crystal is a general-purpose, object-oriented programming language. With syntax inspired by Ruby, it’s a compiled language with static type-checking. Types are resolved by an advanced type inference algorithm.

Top issues to fix

8 issues found · 2 high priority

  • Missing Strict-Transport-Security header

    Security

    Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.

  • Missing Content-Security-Policy header

    Security

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

  • 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.

  • Meta description longer than 160 characters

    SEO

    Trim the meta description to under 160 characters to avoid truncation in search results.

  • robots.txt not found

    SEO

    Publish /robots.txt with a Sitemap: directive to guide crawlers.

+2 more issues — details in the sections below.

85

SEO

3 issue(s) found

100

Performance

428 ms

65

Security

HTTPS & header checks

100

Accessibility

0 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.

Crystal is a general-purpose, object-oriented programming language. With syntax inspired by Ruby, it’s a compiled language with static type-checking. Types are resolved by an advanced type inference algorithm.

YouTubeX (Twitter)

Contact

Email, phone, and address published on this site's own pages.

Meta tags

Title
The Crystal Programming Language
Description
Crystal is a general-purpose, object-oriented programming language. With syntax inspired by Ruby, it’s a compiled language with static type-checking. Types are resolved by an advanced type inference algorithm.
Canonical
https://crystal-lang.org/
Language
en
Charset
utf-8
Viewport
width=device-width, initial-scale=1.0
Robots meta
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
Crystal
og:description
Crystal is a general-purpose, object-oriented programming language. With syntax inspired by Ruby, it’s a compiled language with static type-checking. Types are resolved by an advanced type inference algorithm.
og:type
website
og:url
https://crystal-lang.org/

Twitter Card

twitter:card
summary
twitter:title
Crystal
twitter:description
Crystal is a general-purpose, object-oriented programming language. With syntax inspired by Ruby, it’s a compiled language with static type-checking. Types are resolved by an advanced type inference algorithm.

Technologies

Detected frameworks, languages, and tools.

Google Analytics

Hosting & CDN

Hosting provider
—
CDN provider
CloudFront
IP address
—
ASN
—

DNS records

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

TLS / SSL certificate

Version
TLS 1.3
Issuer
Amazon
Subject
crystal-lang.org
Valid from
Oct 14, 2025
Valid to
Nov 11, 2026
Days until expiry
106
SAN domains
crystal-lang.org

Security headers

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

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 1 · H2 4 · H3 10

Links

55 internal · 23 external · 20 broken

Images

13 total · 0 missing alt

Scripts / Styles

3 scripts · 1 stylesheets

JS / CSS size

153 B · 0 B

Page size

45.3 KB

Robots.txt & Sitemap

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

SEO issues

  • Meta description longer than 160 characters
  • robots.txt not found
  • sitemap.xml not found

Accessibility issues

No accessibility issues detected.

Scan details

Requested URL
https://crystal-lang.org
Final URL
https://crystal-lang.org
HTTP status
200
HTTP version
HTTP/2
Response time
428 ms
HTML size
45.3 KB
Redirect chain
https://crystal-lang.org

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Frequently asked questions

What technology does crystal-lang.org use?
crystal-lang.org is built with Google Analytics.
Is crystal-lang.org secure (HTTPS)?
Yes. crystal-lang.org uses TLS 1.3 with a certificate issued by Amazon, valid until Nov 11, 2026.
Who hosts crystal-lang.org?
Hosting provider information for crystal-lang.org is not available yet.
What is crystal-lang.org's SEO score?
crystal-lang.org scored 85/100 for SEO in the latest analysis (great).
What is crystal-lang.org's overall website score?
crystal-lang.org has an overall SiteGraph score of 87/100, combining SEO, performance, security, and accessibility.