Compress PDF Online
Optimise a PDF to make the file smaller. Everything runs in your browser, so your document stays private.
How to use Compress PDF
- Choose your PDF file.
- Click Compress PDF and wait a moment.
- Compare the original and new size, then click Download Compressed PDF.
About this tool
This tool re-saves your PDF with a more efficient internal structure and removes unused data. It does not re-compress the images inside the PDF, so a PDF made of large scanned photos may not shrink much. If that happens, compress the photos first with the Image Compressor and then rebuild the PDF with Image to PDF.
Frequently asked questions
How much smaller will my PDF get?
It depends on the file. PDFs with a lot of unused data can shrink noticeably. PDFs that are mostly large images may change very little.
My scanned PDF did not get smaller. What can I do?
Compress the original photos with the Image Compressor, then combine them again using Image to PDF.
Will the quality or text change?
No. The pages are kept as they are and only the internal structure is optimised.
Are my files uploaded?
No. Compression happens in your browser and your PDF never leaves your device.