Are documents uploaded?

Documents are processed in this browser, not uploaded to the PDFHush server. Loading the site and fonts still requires network access.

What limits file size?

Available browser memory and document complexity limit processing. Large files may fail. Try a smaller document.

Compress PDF Online

Optimize one PDF in your browser without intentionally lowering image resolution.

✓ No server upload✓ No signup required✓ Limited by device memory

Preparing local editor…

Your files stay on this device.

At a glance

Where it runsYour files are processed in this browser and are not uploaded to a server.
How to use itAdd your files, then follow the settings in the editor to complete the task.
When you are doneDownload the result when it is ready; your original files stay unchanged.

Optimize one PDF in your browser without intentionally lowering image resolution. The current tool rewrites PDF object streams; it does not downsample images or offer a target file size. Already optimized or scanned PDFs may shrink very little or become larger. Compare the output with the original.

Frequently Asked Questions

Are documents uploaded?: Documents are processed in this browser, not uploaded to the PDFHush server. Loading the site and fonts still requires network access.
What limits file size?: Available browser memory and document complexity limit processing. Large files may fail. Try a smaller document.