Compress PDF

Reduce file size while optimizing for maximal PDF quality. ClaudPDF processes your document entirely in your browser, so your files are never uploaded anywhere.

Use the Compress PDF tool for free with no sign-up, no watermarks and no waiting queues. Drop your PDF in, pick your options, and download the result in seconds.

Because everything runs locally with WebAssembly, Compress PDF works on Windows, macOS, Linux, Android and iOS — and your document never leaves your device.

How to use Compress PDF

1. Open the Compress PDF tool and drop your file into the upload area.
2. Adjust the available options to match what you need.
3. Click the process button — the work happens instantly in your browser.
4. Download your finished file.

Frequently asked questions

Is Compress PDF free?

Yes. Compress PDF is completely free with no sign-up, no watermarks and no file limits.

Are my files safe when I use Compress PDF?

Yes. Compress PDF runs entirely in your browser, so your files are never uploaded to a server.

Do I need to install anything to use Compress PDF?

No. Compress PDF works directly in your web browser on any device — desktop or mobile.

Related tools: Repair PDF · OCR PDF