Post Quantum Secure File Sharing.
Instacrypt makes strong, post-quantum-ready encryption simpler.
Why we built it What is it for? Install
How it works — in plain words
No passwords to invent, remember, or whisper over the phone — just locks and keys.
1 · Encrypt with someone's lock
Pick one or more contacts, drop in a file, done. A file encrypted with your friend's lock can be opened by their key alone — not by us unless specified, not by whoever runs your email or chat, not by anyone in between.
2 · Share it any way you like
Send the encrypted file over any chat, email, or cloud drive — it's safe wherever it travels. Or let Instacrypt Cloud deliver it straight into your contact's app with one click.
Why Instacrypt is different
- Ready for the quantum era. Files are protected with a hybrid of today's proven encryption and new post-quantum algorithms — built on battle-tested open source, not homemade cryptography.
- Private by default. An encrypted file reveals nothing but its size — not the file name, not who sent it. That's less than most encryption tools give away.
- No lock-in. Everything works fully offline, free forever, on Linux, macOS, Windows, Android, and iOS. Your files open with any Instacrypt app — no account required.
- A cloud that can't read your data. The optional Instacrypt Cloud syncs contacts and keys and delivers shared files — but everything is encrypted on your device first. There are no download links to leak: shared files arrive only inside the recipients' apps.
- Open source The apps, the CLI, and the developer library are free and open — inspect it, build on it.