What this tool covers
Compare response status and important HTTP headers returned by two public URLs. The result is based only on the source and settings supplied for the current run.
HTTP Header Comparison Tool
Compare response status and important HTTP headers returned by two public URLs.
Privacy: Only the public URL you enter is checked. Do not enter login details, private links or confidential information.
Result
Your output
Add the required input and run the tool.
How to use the result
Start with a representative input, inspect the first output, and change one option at a time. Copy or download the result only after checking it against the source.
Important limitation
Headers can vary by cache, location and user agent, so treat the output as a point-in-time comparison.
About HTTP Header Comparison Tool
This HTTP Header Comparison Tool page is organised around the task described in the tool interface. Compare response status and important HTTP headers returned by two public URLs. The result changes when the source data or selected options change, so it is easy to run a second comparison.
A practical way to use it is to run a fresh diagnostic after a hosting, DNS, certificate, redirect, content or performance change. Start with a representative input, inspect the first result, then adjust one setting at a time if you need a different outcome.
The checker uses the public target you enter to make a diagnostic request. Do not place credentials or private access tokens in a URL.
Using HTTP Header Comparison Tool well
Input
What to prepare
The public URL, domain, IP address, record type, or audit option requested by the checker.
Result
What the tool returns
A point-in-time observation from the public target and the checks available on this page.
Useful situations
- Investigating a public-site problem with HTTP Header Comparison Tool.
- Verifying a recent configuration change with HTTP Header Comparison Tool.
- Collecting a diagnostic snapshot before troubleshooting with HTTP Header Comparison Tool.
Checks and limitations
- Results can vary by location, cache, DNS propagation and temporary server conditions. Confirm important findings with the relevant host or service.
- A comparison highlights differences but still requires human review of their meaning and impact.
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LookupHow it works
1. Add the Required Input
The public URL, domain, IP address, record type, or audit option requested by the checker.
2. Review HTTP Header Comparison Tool Options
Choose only the settings that apply to the result you need; leave optional controls unchanged when you are unsure.
3. Compare the Sources
Start the task and wait for the interface to return its result or a clear setup message.
4. Verify Before You Use It
Results can vary by location, cache, DNS propagation and temporary server conditions. Confirm important findings with the relevant host or service.
Frequently Asked Questions
The public URL, domain, IP address, record type, or audit option requested by the checker. Start with a representative input and use only the options needed for your intended result.
A point-in-time observation from the public target and the checks available on this page. A comparison highlights differences but still requires human review of their meaning and impact.
Results can vary by location, cache, DNS propagation and temporary server conditions. Confirm important findings with the relevant host or service.
The checker uses the public target you enter to make a diagnostic request. Do not place credentials or private access tokens in a URL.
The page can be used without creating a visitor account. Your browser or device may limit unusually large files or demanding media jobs.