Website Server & OS Checker
Find out which web server, operating system, CDN and backend technology a website runs on.
Continue your work
- HTTP Headers Checker — See the raw headers the detection uses.
- IP Location Lookup — Find where the server is hosted.
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Clear instructions
Find steps, examples and limitations below.
Use online
Open the tool in a supported web browser.
Free to use
No sign-up required. Tool-specific limits may apply.
How to use the Website Server & OS Checker
Find out which web server, operating system, CDN and backend technology a website runs on.
- 1 Enter the website address.
- 2 Click Detect technology.
- 3 Read the server details and the grouped list of detected technologies.
Example and practical tips
Checking wordpress.org shows Nginx on Linux with WordPress and Google Tag Manager. A site showing Cloudflare as the server hides its origin server behind the CDN.
Frequently asked questions
Why is the version hidden?
Well-configured servers hide their version numbers so attackers cannot target known weaknesses. The operating system is then inferred from other clues.
Is detection always right?
It relies on tell-tale headers, file paths and tags. Sites can remove or fake these, so treat the results as strong hints rather than proof.
Report an issue
Something broken or not quite right? Tell us and we will look into it.