Free Compress PDF Online
Reduce PDF file size with our free online PDF Compressor. Compress large PDF documents to make them easier to email, upload, or share — without losing quality. Our tool offers three compression levels (Low, Medium, High) so you can balance file size and quality. Using advanced pdf-lib optimization, it removes unused objects, applies object stream compression, and optionally strips metadata to achieve maximum size reduction. Everything runs in your browser — your documents are never uploaded to any external server. Ideal for compressing PDFs for email attachments, web uploads, and storage optimization.
How to Use Compress PDF
Upload Your PDF
Drag and drop your PDF file into the upload area or click to browse. Supports all standard PDF files.
Choose Compression Level
Select Low (best quality), Medium (balanced), or High (smallest file) compression level.
Compress & Download
Click Compress PDF and download the smaller file. See the exact file size reduction percentage.
Features
Three Compression Levels
Choose between Low, Medium, and High compression to balance quality and file size reduction.
Size Comparison
See original and compressed file sizes side by side with the exact reduction percentage.
Metadata Stripping
High compression removes metadata (title, author, keywords) for additional size reduction.
Secure Processing
All compression happens in your browser. Your PDFs are never uploaded to any server.
Benefits of Using Compress PDF
Completely Free
Use Compress PDF without any cost, limits, or hidden fees. No premium plans needed.
No Installation
Works directly in your browser. No software downloads or plugins required.
100% Private
Your files and data are processed locally. Nothing is uploaded to external servers.
Works Everywhere
Compatible with Chrome, Firefox, Safari, Edge on desktop, tablet, and mobile.
No Sign-Up
Start using the tool immediately. No account creation or email verification.
Always Available
Access this tool 24/7 from anywhere in the world, on any device.
Frequently Asked Questions
Complete Your PDF Tools Workflow
These free tools work seamlessly with Compress PDF to handle every step of your workflow.