Compress PDF
Shrink scanned & image-heavy PDFs.
100% in your browser — nothing uploadedDrop a PDF here
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Best for scanned or image-heavy PDFs
Compression runs entirely in your browser, so it works by flattening each page to an image. That shrinks scanned & image-heavy PDFs a lot, but text becomes non-selectable — keep the original if you need editable text.
About this tool
Reduce PDF file size by flattening each page to a compressed JPEG, with a few quality levels. Great for scanned documents; note that text becomes non-selectable. Runs entirely in your browser — your PDF is never uploaded.
- Files are processed on your device — nothing is uploaded.
- No account, no watermark, no daily limits.
- Works offline once the page has loaded.
Frequently asked questions
- Is my PDF uploaded to a server?
- No. Compression runs entirely in your browser using pdf.js and pdf-lib, so even confidential documents stay on your device.
- How does it shrink the file?
- Each page is rendered and re-saved as a compressed JPEG inside a new PDF. This is very effective for scanned and image-heavy PDFs.
- Will the text still be selectable?
- No — because pages are flattened to images, text and links become non-selectable. Keep the original if you need editable text.
- Why didn't my PDF get smaller?
- Text-based PDFs are already compact, so flattening them to images may not help (and can even grow them). This tool shines on scans and photo-heavy documents.