Free public URL tool

Compression Checker

Check whether the public HTML response advertises gzip, Brotli, or zstd compression and compare transferred page weight.

Problem, cause, fix, verify

Problem

Teams often blame images or JavaScript before checking whether text responses are compressed and whether transferred bytes match expectations.

Audience

Developers, hosting teams, agencies, and site owners reviewing public response efficiency.

First check

Enter a public page URL. The checker uses the same protected URL validation and bounded fetch model as the Website Speed Test.

Verify

After enabling compression or CDN rules, retest the same URL and compare transferred bytes, cache-control, and failed resource counts.

Editorial trust

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Tools
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Decision Support

Teams often blame images or JavaScript before checking whether text responses are compressed and whether transferred bytes match expectations.

For: Developers, hosting teams, agencies, and site owners reviewing public response efficiency.

Use The Tool

What this tool helps you check

Inputs

Enter a public page URL. The checker uses the same protected URL validation and bounded fetch model as the Website Speed Test.

Output

Review the public content-encoding signal, transferred page weight, resource count, and resource-domain weight from the collected HTTP-lite result.

How To Read It

Missing HTML compression is a practical review item, especially for text-heavy pages. Asset compression still needs CDN or server confirmation when the decision depends on specific CSS, JavaScript, SVG, XML, or JSON files.

Follow-Up

After enabling compression or CDN rules, retest the same URL and compare transferred bytes, cache-control, and failed resource counts.

This checks the public HTML response and transferred resources collected by the HTTP-lite test; it does not inspect private server configuration.

Limitations

Use the result as planning guidance

  • Checks the public HTML response and collected resources from HTTP-lite mode.
  • Does not inspect private server or CDN configuration.
  • Does not prove every asset type is compressed.