Compress PDF Online
Reduce your PDF file size without sacrificing quality. Choose from multiple compression presets to balance size and quality. Everything runs in your browser — no upload needed.
Drop a PDF file to compress
or click to browse · Max 100.0 MB
Frequently Asked Questions
How much can I reduce my PDF size?+
Typical reduction ranges from 30% to 80% depending on the content. PDFs with large images see the biggest reductions. Text-heavy documents may see smaller gains.
Will compression reduce the quality of my PDF?+
You can choose your compression level. Light compression preserves nearly all quality while reducing size. Maximum compression achieves the smallest file size with some quality trade-off.
Is my PDF uploaded to a server for compression?+
No. Compression runs entirely in your browser using WebAssembly. Your file never leaves your device — this is the most private way to compress a PDF online.
Can I compress multiple PDFs at once?+
Currently, files are compressed one at a time. You can compress each file sequentially using the tool.
How it works
1
Upload your PDF
Drop the PDF you want to shrink. It stays in your browser — no upload.
2
Choose compression level
Compare multiple presets side by side. See the file size and quality tradeoff for each.
3
Download smaller PDF
Save the compressed file. You can reduce size by up to 90% without visible quality loss.