All the processing happens locally on your device.
The PDF standards and preflight engine. Convert any PDF to every PDF/A level, PDF/UA, PDF/X, PDF/E and PDF/VT, then preflight the result against 396 bundled profiles to confirm it conforms.
Explore KuraThe best open source PDF compression engine. It never returns a file larger than the original, offers a true lossless mode, and posted the lowest corruption rate of every engine we benchmarked.
Explore Hyper CompressClick a tool to open the file uploader
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Press and hold keys to set a shortcut. Changes are
auto-saved.
⚠️ Avoid common browser shortcuts (Cmd/Ctrl+W, Cmd/Ctrl+T,
Cmd/Ctrl+N etc.) as they may not work reliably.
Use the full screen width for all tools instead of a centered container
Display tools as a compact list instead of cards
Configure external processing modules (PyMuPDF, Ghostscript, CoherentPDF)