cobalt.tools
cobalt
Last scanned Jul 26, 2026, 5:17 AM
Overall score
Great
Summary
cobalt lets you save what you love without ads, tracking, paywalls or other nonsense. This website uses Cloudflare Analytics hosted on Cloudflare behind Cloudflare CDN. SEO is good (75/100) and accessibility is good (80/100). Security scores good (75/100) and performance excellent (100/100). Top issue: Missing canonical link.
cobalt lets you save what you love without ads, tracking, paywalls or other nonsense. just paste the link and you're ready to rock!
- United States
- Hosted on Cloudflare
Top issues to fix
7 issues found · 2 high priority
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
No H1 heading found
SEOAdd 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
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.
Missing canonical link
SEOAdd <link rel="canonical"> so search engines know which URL variant to index.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
+1 more issue — details in the sections below.
SEO
3 issue(s) found
Performance
72 ms
Security
HTTPS & header checks
Accessibility
2 issue(s) found
Organization
Company details published in this site's own structured data.
cobalt lets you save what you love without ads, tracking, paywalls or other nonsense. just paste the link and you're ready to rock!
Meta tags
- Title
- cobalt
- Description
- cobalt lets you save what you love without ads, tracking, paywalls or other nonsense. just paste the link and you're ready to rock!
- Canonical
- Language
- Charset
- utf-8
- Viewport
- viewport-fit=cover, width=device-width, height=device-height, initial-scale=1, maximum-scale=1
- Robots meta
- Manifest
- https://cobalt.tools/manifest.json
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- Cloudflare
- CDN provider
- Cloudflare
- IP address
- 172.67.151.137
- ASN
- AS13335 (CLOUDFLARENET - Cloudflare, Inc., US)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA |
|
| MX |
|
| TXT |
|
| NS |
|
| CAA | — |
| CNAME | — |
| IPv6 support | Yes |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Google Trust Services
- Subject
- cobalt.tools
- Valid from
- Jul 21, 2026
- Valid to
- Oct 19, 2026
- Days until expiry
- 84
- SAN domains
- cobalt.tools
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 0 · H3 0
Links
7 internal · 0 external · 0 broken
Images
1 total · 0 missing alt
Scripts / Styles
5 scripts · 14 stylesheets
JS / CSS size
112 KB · 516 B
Page size
26.7 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 0
- sitemap.xml
- Found
- URLs in sitemap
- 21
SEO issues
- Missing canonical link
- No H1 heading found
- No structured data (JSON-LD) found
Accessibility issues
- No H1 heading found
- Missing <html lang> attribute
Scan details
- Requested URL
- https://cobalt.tools
- Final URL
- https://cobalt.tools
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 72 ms
- HTML size
- 26.7 KB
- Redirect chain
- https://cobalt.tools
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does cobalt.tools use?
- cobalt.tools is built with Svelte, Cloudflare Analytics.
- Is cobalt.tools secure (HTTPS)?
- Yes. cobalt.tools uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Oct 19, 2026.
- Who hosts cobalt.tools?
- cobalt.tools is hosted on Cloudflare, behind Cloudflare CDN.
- What is cobalt.tools's SEO score?
- cobalt.tools scored 75/100 for SEO in the latest analysis (fair).
- What is cobalt.tools's overall website score?
- cobalt.tools has an overall SiteGraph score of 82/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card