Gzip Size Estimator

Compressed size in your browser

Paste text or code to see its raw byte size next to the gzip and deflate compressed size, with the savings percentage. Compression runs through the built-in CompressionStream API. Nothing leaves this page.

All compression happens locally via CompressionStream. Your text is never uploaded.
Raw size
0 B
0 bytes
Gzip size
0 B
waiting for input
Deflate size
0 B
waiting for input
Gzip savings
0%
vs raw size
Raw0 B
Gzip0 B
Deflate0 B