Compress PDF Online Free

Your file is processed in your browser, it never passes through our servers.

Drag and drop your PDF file here

or

How it works

  1. Drop a PDF in the zone or use "Choose a file".
  2. Select a level (light, standard, or maximum) depending on your desired size / quality trade-off.
  3. Start the compression: everything happens locally in your browser.
  4. Download the optimized PDF, then start again if needed.

Frequently asked questions

How much can I reduce my PDF size?
Often between 30% and 80% depending on images and fonts. A mostly vector or text-based PDF will gain less than an image scan.
Does my data stay private?
Yes: Ghostscript runs in your browser (WebAssembly). No complete file is sent to our servers for this step.
What is the difference between light, standard, and maximum?
These are Ghostscript presets /printer, /ebook, and /screen, from most conservative to most aggressive for images.
Is there a size limit?
Practically, RAM and browser set the limit. For very large files, be patient or split the document before compression.
Can I edit or merge after compression?
Yes — use our Edit PDF or Merge PDF tools.