Your PDFs are compressed with military-grade security and never stored permanently
Compress PDF
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Supported format: PDF · Max 50.0 MB per file
Free online PDF compressor
Shrink PDF file size in your browser. Pick Extreme, Recommended, or Less compression. Your PDFs are compressed with military-grade security and never stored permanently.
About this tool
Reduce PDF file size so documents fit email attachment limits and upload faster. Choose from three compression presets and see a before/after size comparison — processed locally in your browser.
- Extreme, Recommended, and Less compression presets
- Before/after size comparison
- Honest feedback when already optimized
- No quality loss on text-only PDFs
How to compress a PDF
Upload your PDF
Drag and drop the PDF you want to shrink, or click to browse. Files up to 50MB are supported.
Pick a compression level
Choose Less for best quality, Recommended for everyday use, or Extreme for the smallest file.
Compress
Click Compress PDF — pages are re-encoded in your browser with military-grade security.
Compare and download
See the before/after size comparison, then download the smaller file.
Compress PDF — frequently asked questions
How much smaller will my PDF get?
It depends on the content. Image-heavy PDFs (scans, photos) often shrink by 50–90%. Text-only PDFs are already compact, and the tool will tell you honestly when compression wouldn't help instead of degrading your file for nothing.
Does compression reduce quality?
Compression re-encodes page images at the quality level you choose. Less compression keeps quality very close to the original; Extreme trades visible sharpness for the smallest size. You always see the result before deciding to keep it.
Is my PDF uploaded during compression?
Compression runs in your browser. We keep temporary copies for up to 2 hours so you can download or delete them; after that, files and related records are purged automatically.
Why would I compress a PDF?
Smaller PDFs fit email attachment limits (often 10–25MB), upload faster to portals and forms, and take less storage space — useful for scanned documents, portfolios, and reports.