Compress PDF

Shrink one or more PDFs. Choose how much quality you want to trade for size.

Drop PDFs here

or click to browse files

How to Compress PDFs Online Safely

Pick one or more PDF files

Select documents from your device. You can batch-process multiple PDFs simultaneously.

Choose a compression level

Select a preset like "Lossless" for simple un-optimization fixes, or "Extreme" to aggressively shrink high-res pictures to make your document email-friendly.

Click Compress & Save!

We process the files straight from your RAM, completely skipping standard server-side upload loops. You get an immediate PDF or ZIP download.

Why Compress a PDF with ZimaPDF?

100% Private & Offline

Unlike other tools, ZimaPDF processes your files locally inside your browser. Your sensitive documents never leave your device, guaranteeing absolute privacy and security.

Bypass Upload Limits

Shrink massive scan files into lightweight documents perfectly sized for email attachments and web portal upload limits without losing legibility.