PDF Compressor
Upload a PDF, choose a compression level, download a smaller file
No PDF yet
Choose a file to start compressing
What this tool does
PDF Compressor reduces a PDF's file size by re-rendering each page as a compressed image and rebuilding the document from those images. Everything happens locally in your browser — the file is never uploaded to a server.
How it works
- Choose PDF — pick the file to shrink. Its size and page count appear once loaded.
- Compression level — Low keeps the most detail and gives the smallest size reduction; High compresses hardest for the smallest possible file; Medium balances the two.
- Compress & Download — renders every page to an image at the chosen quality, rebuilds a new PDF from those images, and saves it. A before/after size comparison appears once done.
- Reset — clears the current file to compress another one.
Good to know
- This method works best on scanned documents or image-heavy PDFs, where most of the file size is already visual, not text.
- Because each page becomes an image, text in the output is no longer selectable, searchable, or copyable — this is a real trade-off, not a bug.
- For a PDF that's mostly text, file size may not shrink much, since text is already compact; consider whether you actually need compression for that kind of file.
- Password-protected PDFs can't be processed directly — remove the password first.