frankfurter.app
Frankfurter | Free exchange rates API
Last scanned Jul 27, 2026, 10:43 AM · 1 view
Overall score
Excellent
Summary
Free, open-source exchange rates API sourcing from 84 central banks. This website uses Plausible Analytics hosted on Cloudflare behind Cloudflare CDN. SEO is excellent (100/100) and accessibility is excellent (100/100). Security scores fair (65/100) and performance excellent (100/100).
Free, open-source exchange rates API sourcing from 84 central banks. Current and historical rates for 201 currencies. No API key required.
- United States
- Hosted on Cloudflare
Top issues to fix
5 issues found · 2 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
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.
2 broken links on the page
SEOFix or remove broken links — they waste crawl budget and erode user trust.
SEO
0 issue(s) found
Performance
223 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Organization
Company details published in this site's own structured data.
Free, open-source exchange rates API sourcing from 84 central banks. Current and historical rates for 201 currencies. No API key required.
Meta tags
- Title
- Frankfurter | Free exchange rates API
- Description
- Free, open-source exchange rates API sourcing from 84 central banks. Current and historical rates for 201 currencies. No API key required.
- Canonical
- https://frankfurter.dev/
- Language
- en
- Charset
- UTF-8
- Viewport
- width=device-width, initial-scale=1.0
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- Cloudflare
- CDN provider
- Cloudflare
- IP address
- 104.26.15.64
- 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
- frankfurter.dev
- Valid from
- Jul 24, 2026
- Valid to
- Oct 22, 2026
- Days until expiry
- 87
- SAN domains
- frankfurter.dev, *.frankfurter.dev
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 9 · H3 7
Links
15 internal · 11 external · 2 broken
Images
2 total · 0 missing alt
Scripts / Styles
7 scripts · 1 stylesheets
JS / CSS size
375 B · 11.0 KB
Page size
16.7 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 0
- sitemap.xml
- Found
- URLs in sitemap
- 299
SEO issues
No SEO issues detected.
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://frankfurter.app
- Final URL
- https://frankfurter.dev/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 223 ms
- HTML size
- 16.7 KB
- Redirect chain
- https://frankfurter.app → https://frankfurter.dev/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does frankfurter.app use?
- frankfurter.app is built with Plausible Analytics.
- Is frankfurter.app secure (HTTPS)?
- Yes. frankfurter.app uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Oct 22, 2026.
- Who hosts frankfurter.app?
- frankfurter.app is hosted on Cloudflare, behind Cloudflare CDN.
- What is frankfurter.app's SEO score?
- frankfurter.app scored 100/100 for SEO in the latest analysis (excellent).
- What is frankfurter.app's overall website score?
- frankfurter.app has an overall SiteGraph score of 91/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card