GZIP/Brotli Compression Checker
Paste HTTP response headers to check gzip, Brotli, deflate, or zstd compression. Analyze compressibility, estimated savings, and get server config guides.
GZIP/Brotli Compression Checker
Paste your HTTP response headers to check whether compression (gzip, Brotli, deflate, zstd) is enabled. Get compression type, estimated savings, content-type analysis, and server configuration guidance.
Paste HTTP Response Headers
Brotli vs Gzip Comparison
| Feature | Gzip | Brotli | Deflate | Zstandard |
|---|---|---|---|---|
| Compression Ratio | Good (~70%) | Best (~78%) | Fair (~65%) | Very Good (~75%) |
| Compression Speed | Fast | Slower (at high levels) | Fast | Very Fast |
| Decompression Speed | Fast | Fast | Fast | Fastest |
| Browser Support | Universal | All modern (97%+) | Universal | Limited (Chrome 123+) |
| HTTPS Required | No | Yes (browsers only) | No | Yes (browsers only) |
| Best For | Dynamic content, broad compat | Static assets, max savings | Legacy systems | Real-time / streaming |
Recommendation: Use Brotli for static assets (pre-compressed at build time) and gzip as a fallback for dynamic responses. Most CDNs and modern servers support both with automatic content negotiation via the Accept-Encoding header.
Frequently Asked Questions
What is the GZIP/Brotli Compression Checker?
The GZIP/Brotli Compression Checker is a free online tool that paste http response headers to check gzip, brotli, deflate, or zstd compression. analyze compressibility, estimated savings, and get server config guides.. It runs entirely in your browser with no installation or sign-up needed.
What compression types?
Detects gzip, Brotli (br), deflate, zstd, and identity from Content-Encoding. Also checks Transfer-Encoding for transport-level compression.
How are savings estimated?
When Content-Length is present, uses average ratios (gzip ~70%, Brotli ~78%, deflate ~65%, zstd ~75%) to estimate original or compressed size.
Is it safe?
Yes. All analysis runs in your browser. No data sent to any server.
Is the GZIP/Brotli Compression Checker free to use?
Yes, the GZIP/Brotli Compression Checker is 100% free with no registration, no hidden fees, and no usage limits. All processing happens locally in your browser, ensuring complete privacy.
Does the GZIP/Brotli Compression Checker work on mobile devices?
Yes, the GZIP/Brotli Compression Checker is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.
Do I need to create an account to use this tool?
No account or registration is needed. Simply open the GZIP/Brotli Compression Checker in your browser and start using it immediately. There are no sign-up walls or usage restrictions.
How do I use the GZIP/Brotli Compression Checker?
Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.
Which browsers are supported?
The GZIP/Brotli Compression Checker works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.
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About GZIP/Brotli Compression Checker
GZIP/Brotli Compression Checker is a free, browser-based tool in our Website Tools collection. Everything runs locally on your device — no uploads, no sign-up, and your data stays private.