encryptor.app
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New: encryptor 3.0

Encrypt text and files. Right in your browser.

encryptor encrypts on your device with AES-256-GCM and a generated 130-bit password. Nothing is uploaded. The server never sees your content or password.

Encrypt Decrypt

Free. No account, no tracking, no cookies. Open-source offline edition on GitHub.

Tools

Four tools, one format. Everything runs locally.

Encrypt text

Encrypts your message with a generated password, ready to paste.

Open

Decrypt text

Decrypts text, including version 2 text with your own password.

Open

Encrypt file

Encrypts a file with its name and type under a neutral filename.

Open

Decrypt file

Restores the original file and name from version 3 or version 2.

Open

How it works

Choose text or a file.

encryptor processes it locally, right in your browser. Nothing is uploaded.

A password is generated.

It has 130 bits. Argon2id derives a key, and AES-256-GCM encrypts the data.

Send over two channels.

Send the result one way and the password another, for example, by phone.

The facts

From intelligent piXel GmbH, Germany, and George A. Rauscher, with 25 years in forensics.

AES-256-GCMAuthenticated encryption, standardized by NIST. Any change to the data is detected.
Argon2idRFC 9106, recommended in BSI TR-02102-1. 64 MiB of memory, 3 passes, 4 lanes.
130 bitsAlways generated: 26 Crockford Base32 characters plus 2 check characters for typos.
Format v3Authenticated header. Each 1 MiB block is bound to its position and the file's end.
No uploadNo account, no tracking, no cookies, no analytics, and no third-party scripts.
Open sourceMIT license, on GitHub, together with the complete specification of format v3.

Time to crack

Guessing one generated password would take about 500 billion times the age of the universe.

Calculated for 1 million RTX 5090 GPUs, each paying the full Argon2id cost per guess (about 3,000 guesses per second per GPU). Average case: half of all possible passwords.
7 × 10²¹years
Offline edition

One file. No internet.

Download index.html and open it with a double-click in any current desktop browser. It encrypts and decrypts files and text just like this website, reads version 2 data, and never connects to the network. It fits on any USB drive.

Download index.html Release and checksum

Free and open source under the MIT License. Check the file against the SHA-256 checksum in the release.

Coming soon

encryptor for Mac.

encryptor for Mac is free and runs on macOS only. You download it directly from encryptor.app, not from the App Store.

No Windows version. On some operating systems, security just doesn't pay off. Shout-out to Redmond.

On Windows? encryptor.app works in your browser.

More about encryptor for Mac

Questions

Is encryptor free?

Yes, encryptor is free: no ads, no premium tiers, no account, and no cookies. The upcoming encryptor for Mac is free as well, with no subscription or in-app purchases.

Does encryptor upload my files?

No, encryption and decryption run entirely in your browser on your device. Your files, text, and passwords are never uploaded, and our server never sees them.

How secure is encryptor?

encryptor uses AES-256-GCM and Argon2id with a generated 130-bit password. It does not hide the approximate file size, and it cannot protect a compromised device.

Does encryptor work offline?

Yes, with the offline edition, a single index.html from GitHub that works without an internet connection. It is open source under the MIT License, together with the format specification.

What encryptor doesn't protect

  • Metadata. The approximate file size and who talks to whom stay visible.
  • A compromised device. If the device itself is infected, encryptor can't help.
  • A lost password. Without it, the data is gone. There is no recovery.
  • A password sent with the file. Always use a separate channel.