Compress PDF Online
Free PDF compressor to reduce PDF file size and shrink large PDF files while keeping them readable — all in your browser.
Drop a PDF here
or browse your computer · PDF only
One PDF · up to 650 MB
PDFCreature's free online PDF compressor helps you reduce PDF file size in seconds. Whether you need to email a large PDF, upload a PDF to a portal with a size limit, or just save space, our PDF compressor shrinks large PDF files while keeping them readable — all in your browser.
Why use this PDF tool?
Compress PDF online for free
Reduce PDF size online without installing software or signing up.
Shrink large PDF files
The PDF compressor can shrink large PDF files dramatically, especially image-heavy PDFs.
Three compression levels
Choose Light, Recommended, or Strong to balance PDF quality and file size.
Private PDF compressor
Your PDF is compressed in your browser, so the PDF file you compress never leaves your device.
How to compress PDF files online
- 1
Upload the PDF you want to compress into the PDF compressor.
- 2
Pick a quality level: Light keeps text sharp, Recommended balances size and quality, Strong gives the smallest PDF.
- 3
Click "Compress PDF" and wait for the PDF compressor to reduce your PDF file size.
- 4
Download the smaller compressed PDF — the original PDF stays untouched on your device.
Frequently asked questions
How do I compress a PDF online for free?
Upload your PDF to the Compress PDF tool, choose a quality level, and download the smaller PDF. No sign-up is required to reduce PDF file size.
Will compressing a PDF reduce its quality?
Light compression is lossless. Recommended and Strong levels re-encode pages as images to reduce PDF size more aggressively, which is ideal for large image-heavy PDF files.
What's the maximum PDF size I can compress?
You can compress large PDF files up to 650 MB with our online PDF compressor.
Is the PDF compressor private?
Yes. The Compress PDF tool runs in your browser, so the PDF you compress is never uploaded to a server.