Compress PDF rewrites the document structure in your browser using object-stream compression. No file leaves your device.
Compress PDF
Reduce file size while keeping the PDF readable
Related tools
Keep the workflow moving
FAQ
Common questions
Do my files leave the browser?
No. The processing workspace runs locally in your browser for supported tools, and downloads are generated on-device.
Which browsers work best?
Chrome, Edge, Safari, and Firefox all work for the core tools. Advanced OCR and larger jobs perform best in Chromium browsers with OPFS and worker support.