SEO Report Tools

Webmaster Utilities · Runs in your browser · Free

HTTP Status Code Lookup

Look up what HTTP status codes mean and how they affect SEO.

What this tool does

A searchable reference of common status codes with plain-language meaning and the effect on crawling and indexing.

Who should use it

Anyone reading server logs, crawler reports or Search Console errors.

How it works

Entries are matched by code prefix, class (like 4xx) or words in the name and explanation. The table is maintained from the HTTP specifications and Google's documentation.

How to use it

  1. Enter or paste code, class or keyword in the form.
  2. Use "Load example" if you want to see how input should look.
  3. Press the run button. Processing happens instantly in your browser.
  4. Review the result panel, then copy or download the output if the tool offers it. Use Reset to start over.

Practical example

Search "410" to learn that Gone signals permanent removal.

Understanding the results

Notes describe typical search engine behaviour, which can change.

Limitations

Not every code is listed. This is a reference, not a check of your own URL; use Redirect Checker or HTTP Status Checker for that.

Accuracy and report transparency

Results are computed in your browser from exactly what you enter. Deterministic steps (counting, parsing, encoding, validation) are verified by an automated test-suite with known answers. Where a method is a heuristic, the result panel says "estimated". No external data is used and nothing is invented.

Privacy

Your input never leaves your device for this tool. We count anonymous events (tool opened, run, copied) without storing what you typed. See the Privacy Policy.

Try these next

HTTP Status CheckerCheck the status code, redirects and response time of up to 15 URLs at once.Redirect CheckerTrace the full redirect chain of a URL, with every hop, status code and time.HTTP Header CheckerSee the exact HTTP response headers a URL returns, with notes on SEO-relevant ones.

Frequently asked questions

301 vs 308?

Both are permanent. 308 preserves the HTTP method; Google treats them similarly.

Is my data sent to your server?

No. This tool runs entirely in your browser, so the text or files you enter stay on your device. We do record anonymous counts of how often each tool is opened or run (no input data) to see which tools are useful.

How accurate are the results?

Counting, parsing, encoding and validation steps are deterministic and covered by automated tests with known answers. Anything based on a heuristic is labelled "estimated" in the result panel.

Is this tool really free?

Yes. There is no account, limit or paid plan. The site is supported by advertising, which is disclosed on our Advertising Disclosure page.

References