Compress PDF

Reduce PDF file size while keeping quality.

🔒 Lock All processing happens locally in your browser. Files never leave your device and there is no file-size limit.

How to use Compress PDF

1. Upload: click the drop area or drag your files in — batch selection is supported.
2. Adjust options: pick the output format or page range; the defaults work out of the box.
3. Run and download: everything runs locally in your browser, then save the result.

Is Compress PDF free?

Yes. Compress PDF on Baizhuan is completely free with no usage limits and no account required.

Are my files uploaded to a server?

No. Compress PDF runs entirely inside your browser, so your files never leave your device.

Do I need to install anything?

No. Compress PDF works directly in the browser on Windows, macOS, Linux, Android and iOS.