🗜️ Compress PDF
Reduce PDF file size significantly — up to 70% smaller, while keeping good quality.
or drag & drop your PDF here
How to Compress PDF Files – Complete Guide (Free & Secure)
Our PDF Compressor reduces the size of your PDF documents directly in your browser. No uploads, no server delay – your files stay private. The tool re-encodes images and stream compresses content to achieve up to 70% reduction while preserving readability.
🔒 100% Local
All processing happens on your device. Nothing is uploaded.
⚡ Smart Compression
Reduces image quality intelligently based on your chosen level.
📉 Real Size Comparison
See original vs compressed size before downloading.
📌 How to use this tool
- Upload your PDF – Click “Select PDF” or drag & drop a file.
- Choose compression level – Low (minimal loss), Medium (recommended), or High (max reduction).
- Click “Compress PDF” – The tool will process images and recompress the document.
- Download the result – Compare sizes and save the compressed file.
❓ Frequently Asked Questions
🔹 Does this tool upload my PDF to a server?
No, never. Everything runs locally in your browser using PDF-Lib and Canvas. Your files remain completely private.
🔹 How much can I reduce the file size?
Depending on the content (especially images), you can achieve 30% to 70% reduction. Text-only PDFs may compress less.
🔹 Does compression affect quality?
For images, quality degrades slightly based on the level you choose (Low = minimal, High = noticeable but acceptable). Text and vectors remain sharp.
🔹 Is there a file size limit?
It depends on your device memory. PDFs up to 150 MB are usually fine. Larger files may take longer but work.
🔹 Can I compress password-protected PDFs?
No, please unlock them first. The tool works with unprotected PDFs only.
🔹 Is it free for commercial use?
Yes, 100% free for personal and business use, no watermarks.
⚡ Powered by PDF-Lib & Canvas • Client-side image recompression • No tracking