PDF Compress
Light optimisation re-saves the file with a more compact structure and keeps text selectable. Maximum re-draws each page as a JPEG, which can shrink scanned or image-heavy PDFs a lot but makes text unselectable.
No files yet. Add one to begin.
🔒 All processing happens in your browser — files never leave your device
How it works
- Add a PDF.
- Choose a mode.
- Compare the sizes and download.
Good to know: Results depend on the document. Browser-side light optimisation often saves little or nothing; if the result isn't smaller, keep your original.
Limits: One PDF, up to 100 MB. Maximum mode handles up to 60 pages.
Privacy and processing
All processing happens in your browser — files never leave your device
One PDF, up to 100 MB. Maximum mode handles up to 60 pages.
Frequently asked questions
Are my files uploaded?
No. Merging happens in your browser and the files never leave your device.
Is there a limit on the number of files?
The tool shows its limits on the page. Very large files depend on your device’s memory.
Why did my file not get smaller?
Text-only PDFs and files already compressed by their creator have little left to remove. Try Maximum mode if the pages are scans.
Will Maximum mode hurt quality?
Yes, to a degree. Check the result before sending it, and keep the original.
What does PDF Compress do?
Try to reduce a PDF's file size. Light optimisation re-saves the file with a more compact structure and keeps text selectable. Maximum re-draws each page as a JPEG, which can shrink scanned or image-heavy PDFs a lot but makes text unselectable.