AES-256-GCM · 100% local · open source

Encrypt anything.
Trust nothing but the math.

Text, files, and whole folders — encrypted on your own device with real, audited cryptography. No account, no upload, no company holding your keys.

AES-256-GCM PBKDF2 · 600,000 rounds Zero network calls Open source No install Built-in passphrase generator Optional keyfile 2FA

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Text

Paste a message, get back an encrypted block you can drop into any email, chat, or text file.

Files

Any file, any type. Your filename comes back exactly as it went in, nothing else does.

Folder Vaults PRO

Lock a whole folder at once. Every file and every filename encrypted; your originals never touched.

Why trust a tool you've never heard of

You shouldn't have to take anyone's word for security software. Here's what makes that unnecessary.

Real cryptography, not home-made

AES-256-GCM and PBKDF2 via your browser's built-in crypto.subtle engine — the same library behind every HTTPS connection. No hand-written cipher code anywhere.

Open source

Every line is public. Don't trust us — read the code, or have someone who can audit it for you.

Nothing leaves your device

There's no server. Turn off your WiFi and it still works — that's testable, not a marketing claim.

No backdoor, by design

No password reset, no master key, no "for law enforcement" exception. If you lose the password, nobody can open it — including us.

Simple pricing

One payment. No subscription, no account, no recurring charge.

Free

$0

Forever — no trial, no catch

  • Encrypt & decrypt text
  • Encrypt & decrypt any file
  • Built-in strong passphrase generator
  • Optional keyfile — a real second factor
  • Full source code, open
Open the free app

Pro

$14 one time

Everything in Free, plus:

  • Folder Vaults — lock entire folders at once
  • Encrypted filenames, not just contents
  • Supports future development
Buy Pro

Questions

What happens if I forget my password?

Nothing can be done — the data is permanently unreadable. That's not a missing feature, it's what makes this real encryption instead of security theater. Write your password down somewhere safe before you rely on this for anything important.

Is my data really never sent anywhere?

Correct. There is no server component to this product at all. You can verify it yourself: open it, disconnect from the internet, and every feature still works.

What if Cyphryn's creator gets hacked?

It wouldn't matter. There's nothing to steal — no servers, no user database, no stored keys. Your encrypted files only ever exist on your own device.

Can I use this for my business?

Yes. There's no per-seat licensing or usage limit — buy Pro once and use it on as many of your own files and folders as you like.

What's a keyfile, and do I need one?

It's optional. Add any file alongside your password, and both are required together to decrypt later — so even someone who guesses or steals your password still can't open anything without that exact file too. Most people won't need it; it's there for when a password alone isn't enough.

Why should I trust software from an independent developer?

You shouldn't have to, which is exactly why the code is open. Don't take anyone's word for what security software does — have it checked, or check it yourself.