100% in-browser · No upload
Compress PDF
Reduce PDF file size with adjustable compression levels. See an accurate size estimate before you compress — everything runs on your device.
Private by design
Your PDF never leaves your browser — compression runs locally.
Accurate size preview
We sample pages from your file to estimate the output size before you commit.
Standard PDF output
Result opens in any PDF reader. Best for scanned or image-heavy documents.
How to compress a PDF
- Drop your PDF into the box above or click to browse.
- We sample a few pages to estimate the output size for each compression level.
- Pick a level, then click Compress PDF.
- Download your smaller PDF — opens in any PDF reader.
Which level should I pick?
Use Low for documents you'll print, Recommended for email and web sharing, and High or Extreme when file size matters more than fine detail. This tool rasterizes each page, so it gives the best results on scanned or image-heavy PDFs.