How to use Compress PDF
- Open the tool. No account. The page loads the editor in your browser.
- Add files. Drop files onto the page. They are read locally and never uploaded.
- Compress. Pick Light, Medium, or Heavy, then download the smaller file.
- Download. The result is saved to your device. Nothing is stored on a server.
Frequently asked questions
Will text stay sharp?
Light and Medium recompress images only. Heavy may rasterize pages if images are not the bulk of the size.
What is the file size limit?
Bounded by this device: about 150 MB on desktop, 50 MB on phones.
Is Ghostscript used?
No. Compression is a JavaScript/WASM pipeline in a Web Worker.
Compress PDF on ProMaxPDF (promaxpdf.pro) runs in this browser. Need a walkthrough? Read the free compress pdf guide.