Compress PDF
Reduce the file size of a PDF — most effective for scanned and image-heavy documents.
Drop a PDF here or click to browse
Your file stays on your device — nothing is uploaded.
100% private — your files are processed in your browser and never uploaded to a server.
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The Compress PDF tool reduces file size by re-rendering each page as an optimised image at a quality level you choose. It works best on scanned or image-heavy PDFs, where it can cut the size dramatically. Because pages are rasterized, text becomes part of the image and is no longer selectable. Everything runs in your browser.
Why use this tool
Three quality levels
Pick light, recommended or strong compression to balance size and clarity.
Great for scans
Scanned documents and image-heavy PDFs shrink the most.
Private
Compression runs in your browser — your PDF is never uploaded.
How to use it
Add your PDF
Select or drag in the PDF you want to shrink.
Choose a level
Pick how aggressively to compress.
Download the result
See the before-and-after size and save the smaller file.
Frequently asked questions
How much can it compress a PDF?+
It depends heavily on the content. Scanned and photo-heavy PDFs can shrink by 50–80%. PDFs that are mostly plain text may not shrink much, and can even grow, because this method rasterizes pages.
Will the text still be selectable?+
No. This compressor converts each page to an image, so the text becomes part of that image. If you need selectable text, don't compress with this tool.
Is my PDF uploaded?+
No. The entire process runs in your browser, so your document never leaves your device.
Is it free?+
Yes. Completely free, with no sign-up and no watermark.