Compress PDF files online for free. Reduce to 100KB, 200KB, or 1MB. Best PDF reducer to shrink file size instantly. 100% Client-side.
🔒 100% Free · No Upload · Client-Side Processing
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Open Compress PDF Online FreeEasily compress any PDF file to a fraction of its original size. Our tool supports Basic, Recommended, and Strong compression modes — guaranteeing output under 100KB in Strong mode. Your files never leave your device.
Our tool can reduce PDF size by up to 99%. Strong compression mode guarantees output under 100KB regardless of the original file size.
Yes. All processing happens in your browser (client-side). Your PDF is never uploaded to any server.
Yes. We prioritize text clarity. Even at maximum compression, text remains sharp and legible.
There is no server-side limit since processing is fully client-side. Very large files (100MB+) may take a few minutes.
Yes. Select 'Strong Compression' mode and the tool guarantees output under 100KB.