Compress a PDF online
Reduce the file size of a PDF in your browser. Best for scanned or image-heavy PDFs; we always keep the smaller of the two. No upload, no watermark.
- Runs in your browser: files are never uploaded
- No watermark, no sign-up
- Free to use
What you can do with Compress PDF
- Shrink large, scanned or image-heavy PDFs so they are easier to email and upload
- Compress the whole file in your browser, so it is never uploaded to a server
- Always get back the smaller file: if compression would not help, you keep your original untouched
- Download one ready-to-use PDF with no watermark added by us
How it works
- 1
Add your PDF
Drop in the file. Scanned and image-heavy PDFs shrink the most.
- 2
Compress it
Press Compress PDF. The pages are re-rendered on your device to cut the file size.
- 3
Download the smaller file
If compressing would not make the file smaller, you get your original back untouched.
Compress PDF FAQ
Is my PDF sent to a server to be compressed?
No. The whole process runs in your browser, so the file never leaves your device. It is free, with no sign-up and no watermark added by us.
Why did my file barely get smaller, or come back unchanged?
Compression works by re-rendering pages as images, so it helps most with scanned or image-heavy PDFs. If that would not make the file smaller, we simply hand back your original so you are never left with a worse file.
Will the text still be selectable after compressing?
This tool re-renders pages to shrink them, so it is best for scans and image-heavy documents rather than text you need to keep selectable. If you mainly need to edit or keep the text, use the PDF editor instead.
Drag & drop your file here
Private: processed in your browser
Best for scanned or image-heavy PDFs. We keep whichever is smaller: the compressed file or your original.