Compress PDF
Reduce PDF file size online while keeping good quality. — free, fast and private.
Note: browser compression is limited. This tool re-saves the PDF without embedded bloat, but it does not recompress images — so image-heavy PDFs may shrink very little. For large image PDFs, a desktop tool with image recompression will do more.
How to use Compress PDF
- Choose a PDF file.
- Click Compress PDF — the file is re-saved in your browser.
- Compare the original and new file sizes.
- Download the smaller file if the saving is worthwhile.
Note: this tool runs in your browser. Nothing is uploaded.
Frequently Asked Questions
Is Compress PDF free?
Yes, it is 100% free with no sign-up.
How much smaller will my PDF get?
It depends on the file. PDFs with embedded bloat shrink noticeably; already-optimised PDFs may barely change, and image-heavy PDFs shrink very little because images are not recompressed.
Does compression reduce quality?
No. This tool re-saves the PDF without recompressing images, so quality is unchanged — but that also limits how much it can shrink.
Is my file uploaded?
No. Compression happens entirely in your browser.