Client-Side PDF Compressor with Live Byte X-Ray

100% local WebAssembly processing. Your confidential documents never leave your device.

Reduce PDF file size locally in your browser with zero server uploads. Inspect exact byte breakdown (images, fonts, streams) and protect HD vector pages.

How does MantaPDF compress PDFs without uploading them?

MantaPDF runs a full PDF binary engine inside your browser tab, stripping redundant streams and optimizing embedded images in local RAM.