Server & Network

Cloudflare Feature Analysis

Get a free analysis of whether a website uses Cloudflare and which Cloudflare features are active. Cache, APO, HTTP/3, Brotli, and more.

Analyze Cloudflare Features
Information

About Cloudflare Feature Analysis

Cloudflare is the world's most widely used CDN and security infrastructure; it routes approximately one-third of web traffic through its network. This free tool analyzes the response headers by sending a real request to the URL you enter from the server and shows you, in a badge format, whether the site is on Cloudflare's infrastructure and which of its features are active.

The characteristics analyzed are as follows: Cloudflare presence (server: cloudflare or cf-ray header), Cache status (cf-cache-status: HIT/MISS/BYPASS etc.), APO (Automatic Platform Optimization for WordPress) HTTP/3 (QUIC) (sub-svc header), Brotli compression (content-encoding: br), HSTS (Strict-Transport-Security) and Polish/Mirage (cf-polished, cf-bgj headings). Features that cannot be definitively detected externally, such as Argo Smart Routing and Early Hints, are shown as "undetectable"; this is a matter of scientific honesty, not a lack of tools.

The query is processed securely on the server side: only http/https Only certain addresses are allowed; local and private network addresses (localhost, 127.0.0.1, 10.x, 192.168.x, etc.) are blocked, and the request times out after a certain period. None of the data you enter is stored.

How to use it?

Step by step

  1. The address of the site you want to check https://example.com Enter it in this format.
  2. Analyze Click the button; our server will send a real HTTP request to that address.
  3. The site Whether or not they use Cloudflare It is indicated by a large badge.
  4. For each Cloudflare feature Active / Passive / Undetectable The status, title value, and short description are listed.
FAQ

Frequently Asked Questions

The response from the server checks for the presence of either the 'server: cloudflare' header or the Cloudflare-specific 'cf-ray' header. If either of these two markers is present, the site is running on Cloudflare.

The first request or content that is not being cached may return MISS or DYNAMIC. It is normal to see HIT when you query the page several times. Cache-Control or Set-Cookie headers can disable caching.

Argo Smart Routing is Cloudflare's internal network optimization; its effects are not reflected in HTTP headers. Early Hints (HTTP 103) are an intermediate response code sent when establishing a connection; it cannot be captured in a normal GET/HEAD flow.

Yes, Cloudflare APO (Automatic Platform Optimization) is currently only offered for WordPress. A `cf-apo-via` header with a 'tcache' or 'cache' value indicates that the APO is active and serving content from the cache.

Brotli compression is only applied to text-based content (HTML, CSS, JS). The content-encoding header may not be sent for images or binary files. Also, some origin servers may be configured to disable Cloudflare compression.
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