Compress PDF Files
Reduce your PDF file size without sacrificing quality. Free, private, and instant — compression runs entirely in your browser.
Select a PDF to compress
Drag & drop your PDF here, or click to browse. Large files welcome.
How to compress a PDF online
Upload your PDF
Select the PDF you want to compress from your device or drag it into the upload area.
Choose compression level
Select a compression preset — low, medium, or high — based on your quality vs. size preference.
Download compressed PDF
Click Compress and download your smaller PDF file immediately.
100% Private
Compression happens locally in your browser. Your files never touch a server.
Adjustable Quality
Choose your compression level to balance file size and document quality.
Free Forever
No subscriptions or sign-ups. Compress PDFs for free as often as you need.
Works on Any Device
Use LuraPDF on desktop, tablet, or mobile — no software installation required.