Compress PDF
Reduce your PDF file size online — free, no watermark, no signup.
Drop your PDF here or browse
Max file size: 50 MB
How to use this tool
- Upload your PDF — Drag and drop your file or click to browse. Files up to 50 MB are supported.
- Choose a level — Recommended keeps text selectable. Strong re-compresses scanned pages as images for the smallest size.
- Download — Get your smaller PDF instantly and see exactly how much space you saved. No email required.
Why use PDF Labs?
- 100% Free — No file limits, no premium tier, and never a watermark on your result.
- Private & Secure — Files are processed over a secure connection and automatically deleted after 1 hour.
- Two compression modes — Lossless optimization for everyday PDFs, or strong image compression for large scanned documents.
Frequently Asked Questions
How much can I shrink a PDF?
It depends on the file. Text PDFs that are already optimized may only shrink a little, while large scanned or image-heavy PDFs can shrink by 70% or more using the Strong level.
Will compressing reduce quality?
The Recommended level is lossless and keeps text crisp and selectable. The Strong level re-compresses pages as images, which is ideal for scans but makes text non-selectable.
Is there a file size limit?
You can compress PDFs up to 50 MB. The result is never larger than your original — if a file can't be reduced, we return it unchanged.
Do you keep my files?
No. Uploaded and compressed files are automatically deleted within 1 hour, and we never read or share their contents.