Three compression strengths
Balance page resolution and JPEG quality against output size.
Compress PDF locally
Drop a file herePDF documents up to 100 MB
PDFLocalLossy
Rebuild pages as optimized images. This greatly reduces scanned PDFs but flattens selectable text.
orFiles are processed on your device and never uploadedCompress PDF locally in your browser
Render and rebuild PDF pages with optimized images. This works especially well for scanned and image-heavy PDFs, with no file upload.
Before-and-after comparison
See original size, compressed size, and the percentage saved.
Privacy-first processing
PDF.js rendering and pdf-lib rebuilding happen in device memory.
PDF compression FAQ
Why is text no longer selectable?
This method flattens each page to an image to achieve predictable size reduction.
Which PDFs work best?
Scans, photo collections, and image-heavy documents usually benefit most. Text-only PDFs may not become smaller.
Is the PDF uploaded?
No. Page rendering, JPEG encoding, and PDF generation happen in the browser.
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