Open .gz Files Online

How to open a .gz file online (free)

1. Drop your .gz file onto the box above, or click to choose it.
2. The gzip layer is removed in your browser and the original file is restored — access.log.gz becomes access.log.
3. Download the decompressed file straight away.

Just gunzip, in the browser

A plain .gz holds a single compressed file — most often a server log, a database dump (.sql.gz), a JSON or CSV export. On the command line you'd run gunzip or gzip -d; here you just drop the file and get the original back. Decompression runs on your device via WebAssembly, so even large log files stay private.

.gz is not the same as .tar.gz

If your file is a .tar.gz or .tgz, it's a whole bundle of files, not one — use the tar.gz extractor to unpack it. This page is for single-file .gz. Single-file .xz, .zst, .bz2 and .br (Brotli) work here too, detected automatically.

Is it really private?

Yes. There is no upload step and no account. Open your browser's network tab and watch: no request carries your file data. The tool works offline once the page has loaded.

Is there a size limit?

There's no artificial cap. The file is decompressed in memory, so the real limit is your device's available RAM.