Compress PDF
Reduce PDF file size, especially scans, in your browser.
- Private
- No sign-up
- Works in your browser
Drop a PDF to compress
or browse to choose a file
Best for scanned or image-heavy PDFs · pages are re-encoded as images
Compression runs in your browser using pdf.js — nothing is uploaded.
What is the Compress PDF?
Drop in a PDF to reduce its file size. It works best on scanned or image-heavy documents: each page is re-encoded at a quality you choose. Everything runs in your browser, with nothing uploaded.
How to use it
- 1Drop in a PDF.
- 2Set the image quality and resolution.
- 3Compress, then download the smaller PDF.
Common uses
- Getting a PDF under an email or upload limit
- Shrinking scanned documents
- Saving storage space
- Speeding up sharing of large files
Frequently asked questions
Why didn't my PDF get smaller?
PDFs that are mostly text are already well compressed, so re-encoding may not help. This tool gives the biggest savings on scans and image-heavy PDFs.
Are my PDFs uploaded?
No. Compression runs in your browser using pdf.js and your file is never uploaded.