How to use:
- Upload your PDF file.
- Adjust the JPEG quality and output DPI.
- Click "Compress PDF" and download the smaller file.
Compress PDF
Compress PDF file size online for free. Reduce PDFs in your browser by lowering image quality — no upload, no registration.
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Drop PDF here or click to upload
Only PDF files supported
Frequently Asked Questions
How does this tool compress PDFs?+
The tool renders each PDF page as a JPEG image at your chosen quality and DPI, then regenerates the PDF. This can significantly reduce file size but may lower text and image sharpness.
Does compression affect text quality?+
Yes. Because pages are rasterized into images, text becomes part of the image and is no longer selectable. Use higher quality settings if you need better text clarity.
Are PDFs uploaded to a server?+
No. Compression happens entirely in your browser using pdf-lib and PDF.js, so your files always stay on your device.