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GZIP compressor

Compress a file locally with fast, balanced or smallest GZIP settings and compare the resulting file size.

Choose a file

Choose a file to get started, or drag and drop it here.

Up to 16 MiB

Compress one file with GZIP. Choose a balance of speed and file size.

How it works & useful details

Compress one file with GZIP. Choose a balance of speed and file size.

Everything runs locally. Files are never uploaded. Maximum 16 MiB per input file, 32 MiB combined, and 1 file. Processing can be cancelled.

GZIP uses DEFLATE. Decompression verifies its header, size and CRC-32 and accepts single-member files only. Maximum expanded output is 32 MiB. A CRC check detects accidental corruption; it does not authenticate a file.