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Compress files to .gz at the level you choose, or decompress .gz files back to the original, with the size saving shown.
Also covers: GZIP decompressor · Gunzip online · .gz compressor
Drop files to gzip
Each file becomes its own .gz. To bundle several files first, use the TAR creator (.tar.gz). Files are processed on your device and never uploaded.
gzip compresses one file at a time; it's what .tar.gz archives and web servers use. Text, code, CSV and logs shrink a lot; photos, video and ZIPs barely shrink.
And, for compression, the level: fastest, normal or smallest.
Each file becomes its own .gz (or is restored from one). Files never leave your device.
A single file compressed with gzip (DEFLATE). It's common on Linux and for web assets and logs. To bundle several files, make a .tar.gz with the TAR creator.
Text: code, CSV, JSON, logs and HTML often shrink by 70–90%. Photos, video and ZIPs are already compressed and barely change.
Yes — it's stored inside the .gz and restored when you decompress it here.
ZIP
Zip files and whole folders in your browser, keeping the folder structure, with a choice of compression level — nothing is uploaded.
Extract
Open ZIP, 7z, RAR, TAR, .tar.gz and .gz files in your browser, including password-protected ones, and save the files one by one, as a ZIP, or straight into a folder.
TAR
Bundle files and folders into a .tar or .tar.gz archive, with long and non-English file names kept intact.
Rename
Rename many files at once with a pattern, numbering, find & replace (with regex), case changes and new extensions — preview everything, then download renamed copies.
Clean
Make file names safe for Windows, Mac, Linux and URLs: remove forbidden characters, replace accents and spaces, and fix reserved names like CON.
Duplicates
Find files with identical content in a folder — whatever their names — and see how much space the extra copies take, with a CSV report.