Compress PDF
Reduce your PDF file size by up to 70% without any visible quality loss — entirely in your browser. This free tool optimizes embedded images, compresses internal data streams, and removes unnecessary metadata to produce the smallest possible file. Choose from three compression levels to balance file size against visual quality. Perfect for email attachments, web uploads, and saving cloud storage space.
Compress PDF
Reduce PDF file size while maintaining quality.
Drop file here or click to upload
PDF files only · Max 100MB
How to Use Compress PDF
- 1Upload your PDF file by clicking the upload button or dragging and dropping
- 2Choose a compression level: Low (minimal quality loss), Medium (balanced), or High (maximum reduction)
- 3Click "Compress PDF" to begin optimization
- 4View the compression result showing original size, new size, and percentage saved
- 5Click "Download" to save the compressed PDF to your device
Your Privacy is Protected
Compress PDF runs entirely in your browser. Your files and data are never uploaded to any server, never stored, and never shared. Everything happens locally on your device using secure browser APIs.
Frequently Asked Questions
How much can I compress a PDF?
Compression depends on the content: text-only documents typically see 20-40% reduction, image-heavy documents 50-75%, and high-resolution scans up to 85%.
Will the text still be readable?
Yes. Text compression is lossless — only images are downsampled. Even at high compression, text remains sharp and fully readable.
Is this tool completely free?
Yes, the PDF Compressor is completely free with no file size limits and no account required.
Are my files sent to a server?
No. All compression happens locally in your browser. Your PDF is never transmitted to any server.