Guides/Compress PDF
How to compress pdf free — no upload, no watermark
Re-encodes images, strips metadata, and rebuilds the object graph in a Worker. Text stays vector on Light/Medium. This guide is for ProMaxPDF on promaxpdf.pro. The file never leaves your browser — students and businesses use the same local engine.
- 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.
FAQ
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.