🗜️ Compress PDF
Quick answer
This tool reduces PDF file size by re-rendering each page as an optimised JPEG image at the quality level you pick. It is free, works best on scanned and image-heavy PDFs, and runs in your browser with no uploads.
Drop a PDF file here
Drag & drop a file here, or
🔒 Your files are processed on your device — nothing is uploaded.
Best for scanned/image PDFs — text becomes part of the image, so it will no longer be selectable.
✅ 100% free · 🔒 Runs in your browser — files never leave your device · 🚫 No sign-up
How to use the Compress PDF
- Drop your PDF into the box above or click Choose file to select it.
- Pick a compression level: high quality, balanced, or smallest file size.
- Click Compress PDF and wait while each page is re-rendered.
- Your smaller PDF downloads automatically, with the size saving shown.
Frequently asked questions
Why does compression work best on scanned PDFs?
Scanned PDFs are made of large images, which shrink a lot when re-rendered at a lower resolution. Text-based PDFs may not shrink much.
Will text still be selectable after compression?
No. Pages are converted into images, so text becomes part of the image and cannot be selected or searched.
Is there a file size limit?
There is no set limit, but very large PDFs can take a while and use a lot of memory because everything happens on your device.