ZIP Compressor

Open an existing ZIP, recompress its files locally, and compare the before and after archive sizes.

Existing ZIP archive

DEFLATE level

Output name

—Before

—After

—Size change

—Files

Choose a ZIP archiveRecompression cannot guarantee a smaller ZIP. JPEG, MP4, PDF and other already-compressed files often gain little or nothing.

How to use this ZIP Compressor

Recompress a ZIP archive with adjustable DEFLATE compression. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.