Compress PDF
Shrink a scanned or image-heavy PDF — pick a compression level, all in your browser.
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How to compress a PDF
Drop a PDF and pick a compression level. cutbg re-renders each page as a compressed image on your device, which shrinks scanned and photo-heavy PDFs a lot. If a file is already compact (text-based), cutbg tells you instead of making it bigger. Download it free, no upload.
Is my PDF uploaded?
No — compression runs entirely in your browser with pdf.js and pdf-lib; the file never leaves your device.
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Frequently asked questions
- What kind of PDFs does this shrink best?
- Scanned documents and image-heavy PDFs, where the pages are essentially pictures. It re-renders each page as a compressed image, so those files can drop dramatically in size.
- Will it shrink a text-only PDF?
- Usually not — text PDFs are already compact. If compressing would not make the file smaller, cutbg tells you instead of handing back a larger file. Pick a stronger level for more savings on image PDFs.
- Is my PDF uploaded?
- No — compression runs entirely in your browser with pdf.js and pdf-lib; the file never leaves your device.