Compress PDF
Note: pages are re-rendered as images, so text is no longer selectable. Best for scans and image-heavy PDFs.
Ad slot — 728×90
How to compress a PDF — private & free
- Choose a PDF file.
- Pick a quality level — lower quality means a smaller file.
- Click "Compress & download" and see how much smaller it got.
Frequently asked questions
Is my PDF uploaded when I compress it?
No. Compression runs entirely in your browser using pdf.js and pdf-lib — the file never leaves your device.
How does the compression work?
Each page is re-rendered as a JPEG image at the quality you choose. That makes scans and image-heavy PDFs much smaller, but text is no longer selectable in the output.
How much smaller will my PDF get?
It depends on the source: image-heavy PDFs and scans often shrink 50–80%, while already-optimized text PDFs may not shrink at all.