Compress PDF
Shrink a PDF's file size by recompressing its content, all in your browser. No uploads, no watermarks.
How it works
- 1
Drop your file
Add a PDF (or images). It's read in your browser — nothing is sent to a server.
- 2
Set your options
Configure Compress PDF the way you need.
- 3
Process locally
The document is built in the browser with pdf-lib / PDF.js.
- 4
Download
Save the resulting file or ZIP instantly.
Common uses
- Get a scanned PDF under an email or portal upload limit.
- Shrink an image-heavy brochure so it downloads fast on mobile.
- Reduce a bundle of receipts for cheaper storage without losing readability.
About the Compress PDF
Shrink a PDF's file size by recompressing its content, all in your browser. No uploads, no watermarks.
Compress PDF is part of a free, privacy-first toolkit. Your files are handled entirely in the browser with pdf-lib and PDF.js, so nothing is uploaded to a server and there are no page or size limits.
Because compress pdf works without any sign-up or installation, you can use it as often as you like and it's always available — on desktop or mobile, and even offline.
Explore more pdf tools, or try Images to PDF · PDF to Images.
Related tools
Related guides
Compress PDF — FAQ
Light re-saves the PDF with object streams and keeps text selectable. Strong renders each page to an image and re-encodes it as JPEG at your chosen quality — much smaller for image-heavy PDFs, but pages become images.