Compress PDF
Reduce the size of your PDF files while keeping the quality you need — choose between Low, Normal, and High compression levels.
Compress PDF Files Without Losing Quality
Use our free online tool to reduce PDF file size instantly. Choose your preferred compression level to get the best results for email, upload, or storage without sacrificing readability.
Why Compress a PDF?
- Faster Uploads & Sharing: Send lighter files via email or messaging apps
- Save Storage: Reduce large scanned files or graphics-heavy PDFs
- Improve Load Time: Especially for online PDFs
How to Compress a PDF
- Upload your PDF file
- Select compression level: Low, Normal, or High
- Click Compress PDF
- Download your optimized PDF instantly
Compression Level Guide
- Low: Maintains best quality (minimal size reduction)
- Normal: Balanced quality and compression (default)
- High: Reduces file size as much as possible (lower quality)
Secure PDF Optimization
Your uploaded PDFs are protected with secure HTTPS and automatically deleted after processing. We don’t store your files or data.
Other Useful Tools
FAQs
Does this tool reduce quality?
Only in High compression mode. Low and Normal preserve most visual fidelity.
Is this tool free to use?
Yes — all ModifyPDF tools are free, without watermarks or limits.
What size limit is supported?
You can upload PDF files up to 50MB. Larger files may take more time to compress.