PDF · runs in your browser
Compress PDF
Optimise PDF structure losslessly, then review before downloading.
- Supported formats
- Max file size
- Max 100 MB
- Speed
- Fast
- Free
- Free, no sign-up
- Lossless object-stream optimization
- Smaller email attachments
- No quality loss
Drop files here or click to upload
One PDF for a preview, or several for batch compression
Supports PDF
Shrink PDFs losslessly
Rebuilds the PDF's internal structure to remove redundant data — no visual quality is lost.
- Batch supported
- 3 compression levels
- Nothing uploaded
Private by design. This tool runs entirely inside your browser — your files are never uploaded, stored or seen by anyone, including us.