Will compression lower quality?

We aim for a sensible balance. Text stays readable while images are optimized for smaller size.

Is Compress PDF free?

Yes. Compress PDFs online for free with Korisa.

Many email clients prefer under 10–25MB. Compress until you hit your limit.

Compress PDF online to shrink file size while keeping text readable. Free, private PDF compressor in your browser.

PDF

Runs entirely in your browser — files stay on your device.

Pages are re-encoded as optimized images

Drop a PDF to compress

Strong / Balanced / Quality presets

Higher quality keeps more detail

Reduce bulky PDF file sizes for email, uploads, and sharing. Our compressor balances size and quality so documents stay readable.

No install and no signup — compress PDFs privately in the browser.

Will compression lower quality?: We aim for a sensible balance. Text stays readable while images are optimized for smaller size.
Is Compress PDF free?: Yes. Compress PDFs online for free with Korisa.
What's a good size for email?: Many email clients prefer under 10–25MB. Compress until you hit your limit.