Compress PDF
Shrink PDF file size by re-encoding pages at a compression level you choose. Everything runs in your browser — files are never uploaded.
Drop a PDF here
or click to choose a file
Accepted: PDF · No upload
How to compress a PDF
- Add a PDF file.
- Choose a compression level: light, balanced, strong or extreme.
- Click Compress PDF. Every page is rendered and re-encoded in your browser.
- Download the smaller PDF.
The result filename includes the achieved size, for example omnipdf-compressed-180KB.pdf.
Privacy
Compression happens locally. Files never leave your device.
Known limitations
- Compression re-encodes pages as JPEG. Text is no longer selectable in the compressed copy. Keep your original for editing.
- Digital signatures become invalid because the document bytes change.
- Extremely small targets can make the document hard to read.
Frequently asked questions
Will compression ruin my document?
At light and balanced levels, the visual quality is close to the original for most documents. Only use extreme compression when the size limit is very tight.
Does compression preserve text?
No. The compressed output is a raster PDF. If you need selectable text, use Optimize PDF instead.
Why did my file get bigger?
Small PDFs that are already optimized can grow when rasterized. OmniPDF detects this and keeps the smaller of the two files, warning you that compression was unnecessary.