Compress PDF — Reduce PDF File Size for Free
Shrink large PDFs, such as scans, so they fit email and upload limits.
- 100% free
- No upload — private
- No sign-up
Choose files or drag them here
PDF · Add as many as you like
Your files never leave your device — everything runs in your browser.
Compression level
Best for scans and photos. Pages become 150 DPI images — text can't be selected or searched afterwards.
How to use the Compress PDF tool
- 1
Drop your PDF files into the box, or tap to choose them.
- 2
Pick a level: Light keeps text selectable, Recommended and Strong give much smaller files.
- 3
Press Compress and download the smaller PDF.
Frequently asked questions
Which compression level should I choose?
For scanned documents and PDFs full of photos, “Recommended” usually cuts the size by 50–90%. If you need to keep the text selectable and searchable, use “Light”. “Strong” gives the smallest files, best for viewing on screen.
Why can't I select text after compressing?
The Recommended and Strong levels turn each page into an optimized image, which is what makes the file so much smaller. Use the Light level if selectable text matters.
Is my PDF uploaded?
No. Compression runs entirely in your browser, so your document never leaves your device.
What if the file doesn't get smaller?
Some PDFs are already well optimized. If compression can't make the file smaller, the tool keeps your original so you never end up with a bigger file.
Can I compress several PDFs at once?
Yes. Add as many PDFs as you like and download them one by one or together as a ZIP.