Compress images online, free and private
Compresso is a free online image compressor that runs entirely in your browser. Your photos never leave your device — there is no server upload, no account, and no file-size cap.
How it works
- Open the Compresso app in your browser.
- Drop or select the images you want to compress.
- Adjust quality, format, or max size — then download the optimized file.
Common questions
- Is it really free?
- Yes. Compresso is free, open source, and requires no account.
- Are my images uploaded?
- No. Compression happens locally on your device. Zero bytes are sent to any server.