Server signature checker

Free Server Signature Checker — Is Your Server Signature Exposed?

This tool checks whether a website reveals its server signature in the HTTP response headers. Enter any URL and you'll see whether the server is disclosing its software and version — for example "Apache/2.4.52 (Ubuntu)" — to anyone who asks.

This is a small but real security hygiene issue. When a server broadcasts its exact software and version in the Server header, it hands attackers a head start: they can look up known vulnerabilities for that specific version and target them directly. Suppressing or trimming the signature follows the security principle of least disclosure — there's no benefit to the public knowing precisely which software and version you run, and several reasons to keep it private. It's a low-effort hardening step that reduces your attack surface.

Use this tool to check whether your own server is leaking version details, to confirm a hardening change actually took effect, and to audit servers you manage. If the signature is exposed, the fix is usually a single configuration directive — ServerTokens Prod in Apache, server_tokens off in nginx, or the equivalent on your stack — which strips the version (and often the OS) from the header. It won't transform your security on its own, but it's an easy, sensible default for any production site.

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