HTTP Headers Analyzer

Free online HTTP Headers Analyzer that runs directly in your browser.

Secure (SSL)

Client-Side Processing

100% Free

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Instructions

1

Enter data
Enter content, paste text or load a file from disk.
2

Click the button
The tool will immediately process your data in the browser.
3

Get the result
Copy the finished text or save the file to your device.

                                                function runTool() {

                                                  return "Result ready in 0.1s";

                                                }

Request Parameters

URL

User-Agent (optional)

Timeout (seconds)

Follow redirects

Enter the URL and click "Analyze" to view the details and HTTP status.

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HTTP header analyzer: check the server, security and redirections in 30 seconds

Sometimes the website "works", but something is wrong: SEO fails after migration, the cache makes a mess, and the browser screams about the lack of HSTS. And that's where HTTP headers come in - little lines that say more about your website than many plugins. This analyzer collects headlines, counts Security Score, shows redirects and gives you a clear report: what is OK, what is suspicious and what is worth improving.

free online without registration security report 301/302 redirects cache and compression

What exactly will you check in the headers?

HTTP headers are the server's response to your request. In practice, they contain information abouthow the server delivers the content(status, cache, compression, data type) andhow it protects the user(security headers, policies, cookies). Thanks to them, you know whether the website uses HTTPS, whether it has a reasonable cache, whether it protects against clickjacking, or whether it accidentally reveals the server technology.

In the analyzer you get a summary (status, response time, resource size), a security report, a full list of headers and a raw response - perfect when you want to paste the result into a ticket or compare the configuration before and after changes.

When does this tool save the day?

Most often, when "something" is not right, but it is difficult to point out the culprit. Cache errors can masquerade as application errors. Redirects can eat up your crawl budget and ruin performance. And the lack of security headers may not be visible until the first incident or audit.

If you are migrating to HTTPS, implementing a CDN, changing the server (e.g. Nginx/Apache), replacing the application or adding a WAF - a header test is one of the fastest ways to check whether the configuration has gone in the right direction.

How to use the HTTP header analyzer step by step

It's simple, but it's worth sticking to one rule: testa specific addressthat has business significance (e.g. home page, campaign landing page, important article, API endpoint). Different paths can have different headers.

Paste the full URL, preferably with the protocol (https://…)
If you are testing security, leave the default User-Agent. If the server blocks bots, enter your own.
Set a timeout when the server is slow or behind a "capricious" proxy.
Decide whether you want to follow the redirects. For SEO diagnostics, usually yes - for "why it redirects" tests, sometimes no.
Click on the analysis and compare the summary with the details in the report.

If the result looks strange (e.g. missing headers, no response), do not immediately assume a tool failure. Some servers block automatic queries, require specific headers or return different responses depending on the User-Agent and location.

How to read the score: status, time, size and "Security Score"

HTTP response codetells you what the server did with your request. 200 is boring (good). 3xx are redirects (sometimes ok, sometimes a problem). 4xx are errors on the request or access side (e.g. 403/404). 5xx usually indicates a server or application problem. The analyzer also showsresponse time- this is not a full performance test, but a great signal of "is it slow at the start?"

The size of the resource(Content-Length) can reveal surprising things: it suddenly increases after implementation because the compression is gone; drops to a