Make your PDF smaller so it's easier to email and upload. No login, no watermarks, and completely private — your file never leaves your device.
or click to browse · one file at a time
No installs, no accounts. Add your file, pick a level, and download the smaller PDF.
Click the box above or drag a PDF onto it.
Pick Strong, Balanced, or Light depending on how small you need it.
Press Compress PDF and your smaller file downloads instantly.
A moderate setting is a good starting point for email and portal uploads. Stronger compression can reduce image clarity, especially in scans, screenshots and documents with small type.
Compression results depend on what the PDF contains. Image-heavy scans usually shrink more than documents already optimised by another program. Always inspect signatures, fine print and diagrams.
No. This tool does all of its work with JavaScript running inside your own browser. Your file never leaves your device, which is why it's both fast and private.
To shrink the file, each page is re-saved as an optimized image. This is what makes big reductions possible on scanned and image-heavy PDFs, but it means the pages become pictures, so text can't be selected or searched in the compressed copy. Keep your original if you need selectable text.
PDFs that are mostly plain text or vector graphics are already very compact, so turning them into images can keep them the same size or even make them larger. In that case, just keep your original file — it's already well optimized.
Start with Balanced. Choose Strong when you need the smallest possible file (for email limits), or Light when image quality matters most.
No — it's completely free with no sign-up, just like every WriteReady tool.
Any up-to-date version of Chrome, Firefox, Edge, or Safari on desktop or mobile.