Gzip Compressor & Decompressor
Browser-native CompressionStream. Compressed output is base64 for transport.
Gzip Compressor & Decompressor — Free Online Tool
Compresses and decompresses text or binary data using the browser-native CompressionStream gzip API, with configurable level output and base64 transport encoding, returning the compressed payload size and ratio, useful for previewing API response compression, debugging content-encoding: gzip payloads, and benchmarking client-side compression without a server round-trip.
How to use the Gzip Compressor & Decompressor
- Open the tool above — it runs entirely in your browser, so your input never leaves this page.
- Paste or type your input into the field, then press the relevant button (e.g. Encode / Decode, Generate, or Convert).
- Copy the result from the output area with the copy button orCtrl/Cmd + C.
- No signup, no upload, and no tracking — repeat as often as you need.
Frequently asked questions
Is the Gzip Compressor & Decompressor free to use?
Yes. The Gzip Compressor & Decompressor is completely free, with no signup, no ads inside the tool, and no hidden limits.
Does the Gzip Compressor & Decompressor upload my data?
No. The Gzip Compressor & Decompressor processes everything locally in your browser. Your input is never sent to a server, so it stays private even on shared devices.
Does the Gzip Compressor & Decompressor work offline?
After the page loads, the Gzip Compressor & Decompressor runs entirely in your browser, so it keeps working without a network connection.
Free & private — why use this Gzip Compressor & Decompressor
The Gzip Compressor & Decompressor runs 100% client-side in your browser. Your data is never uploaded to a server, no account is required, and the tool is completely free. It works offline once the page has loaded and is part of a growing collection of privacy-first developer utilities.