bun.com
Bun — A fast all-in-one JavaScript runtime
Last scanned Jul 26, 2026, 5:47 AM
Overall score
Great
Summary
A fast all-in-one JavaScript runtime and toolkit. This website uses Plausible Analytics behind Cloudflare CDN. SEO is good (80/100) and accessibility is excellent (100/100). Security scores good (75/100) and performance good (80/100). Top issue: Meta description longer than 160 characters.
Bun
A fast all-in-one JavaScript runtime and toolkit
Top issues to fix
9 issues found · 1 high priority
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
Meta description longer than 160 characters
SEOTrim the meta description to under 160 characters to avoid truncation in search results.
Missing OpenGraph tags
SEOAdd og:title/og:description/og:image so shared links render a proper preview card.
robots.txt not found
SEOPublish /robots.txt with a Sitemap: directive to guide crawlers.
+3 more issues — details in the sections below.
SEO
4 issue(s) found
Performance
3.14 s
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Organization
Company details published in this site's own structured data.
Contact
Email, phone, and address published on this site's own pages.
- alice@example.com
Meta tags
- Title
- Bun — A fast all-in-one JavaScript runtime
- Description
- Bundle, install, and run JavaScript & TypeScript — all in Bun. Bun is a new JavaScript runtime with a native bundler, transpiler, task runner, and npm client built-in.
- Canonical
- https://bun.com
- Language
- en
- Charset
- UTF-8
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- Manifest
- https://bun.com/manifest.json
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- —
- CDN provider
- Cloudflare
- IP address
- —
- ASN
- —
DNS records
| Type | Value |
|---|---|
| A | — |
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Google Trust Services
- Subject
- bun.com
- Valid from
- Jun 27, 2026
- Valid to
- Sep 25, 2026
- Days until expiry
- 58
- SAN domains
- bun.com, *.bun.com
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 1 · H2 13 · H3 24
Links
71 internal · 7 external · 20 broken
Images
21 total · 1 missing alt
Scripts / Styles
11 scripts · 2 stylesheets
JS / CSS size
0 B · 0 B
Page size
283 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
- Missing OpenGraph tags
- robots.txt not found
- sitemap.xml not found
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://bun.com
- Final URL
- https://bun.com
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 3.13 s
- HTML size
- 283 KB
- Redirect chain
- https://bun.com
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Frequently asked questions
- What technology does bun.com use?
- bun.com is built with Google Analytics, Plausible Analytics, Cloudflare Analytics.
- Is bun.com secure (HTTPS)?
- Yes. bun.com uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Sep 25, 2026.
- Who hosts bun.com?
- Hosting provider information for bun.com is not available yet.
- What is bun.com's SEO score?
- bun.com scored 80/100 for SEO in the latest analysis (great).
- What is bun.com's overall website score?
- bun.com has an overall SiteGraph score of 83/100, combining SEO, performance, security, and accessibility.
- What company operates bun.com?
- bun.com is operated by Bun. A fast all-in-one JavaScript runtime and toolkit
OpenGraph & Twitter Card
OpenGraph
Twitter Card