Compress PDF – free online
Reduce file size while keeping the best possible quality for your PDF.
How to use Compress PDF
- Open Compress PDF on ToolPlanet AI.
- Choose a PDF from your device, or drag and drop onto the page.
- Pick a compression level (extreme, recommended or less).
- Download a smaller PDF that keeps good quality.
Frequently asked questions
Is Compress PDF free?
Yes. Compress PDF on ToolPlanet AI is completely free, with no sign-up, no watermark and no limit on downloads.
Are my files uploaded when I use Compress PDF?
No. Compress PDF runs entirely inside your web browser, so your file never leaves your device and is not uploaded to any server.
What do I need to use Compress PDF?
Just a web browser such as Chrome, Edge, Safari or Firefox, on a computer or phone. You start with a PDF and get a smaller PDF that keeps good quality.
Do I need to install software or create an account?
No. Everything works online in your browser. There is nothing to install and no account to create.
More Optimize PDF tools
Edit PDF in the same font
Click any text to change it. Prices, names, dates — edits keep the PDF's own font. Add text, boxes and images, then save.
or drop a PDF here · files stay in your browser