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Compression savings estimator

Compress pasted or dropped CSS, JavaScript, HTML, JSON, or SVG with gzip and deflate in the tab to see real compressed sizes, percent saved, and transfer time at a chosen speed.

Paste some text to see its compressed sizes.

These numbers are estimates for one body of text, measured in this tab. They do not read your server's configuration, so they cannot tell you whether gzip is actually switched on for your site; send a request through curl or the browser devtools network panel and compare the transfer size against the raw size to confirm. Browsers cannot compress Brotli from script, so there is no Brotli column here; the files-brotli tool compresses files locally with Brotli if you want that number. Images, fonts, video, and archives are already compressed and should not be gzipped at the server.
Options

More web & auth tools

- Gzip files (/files/gzip)
- Brotli files (/files/brotli)
- Zstandard files (/files/zstd)
All web & auth tools (/web)

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