Compress PDF Online for Free
Reduce your PDF file size without losing quality. Fast, free, and fully private — your files are processed entirely in your browser.
100% Private — Your files are processed entirely in your browser and never leave your device.
Drag & drop files here or click to browse
Max file size: 100.0 MB
How to Compress a PDF to Reduce File Size
1
Upload your PDF
Drag and drop or click to select the PDF file you want to compress. Files up to 100 MB are supported.
2
Adjust the quality level
Use the quality slider to balance between smaller file size and visual quality. Lower quality means smaller files, higher quality preserves more detail.
3
Compress and download
Click "Compress" and download the optimized PDF. The tool removes unused data and optimizes the file structure without visible quality loss.
Frequently Asked Questions
Results vary depending on the PDF content. PDFs with embedded images typically see 20-60% size reduction. Text-heavy PDFs may see smaller reductions since text is already compact.
Our compression removes unused data and optimizes the PDF structure without affecting visible quality. For most documents, the output looks identical to the original.
Compressed PDFs are easier to email, upload to websites, and store. Many email services have attachment size limits (usually 25 MB), and compressed PDFs help you stay under those limits.
The tool supports files up to 100 MB. Since processing happens in your browser, very large files may take longer depending on your device.