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100% BROWSER-BASED · NOTHING EVER LEAVES YOUR DEVICE
v7.0

Self-Destructing Message Generator

Create an encrypted message that can be opened once or stops opening after the time you choose.

AES-256 encryption
No data ever stored
Works offline once loaded
👋 New here? Type your message → set a password → press Encrypt. That's it — decrypting works the same way in reverse.
Your message ?Type or paste the message you want to lock with a password.
You can also drag & drop a .txt file here 0 / 20,000 characters
Scan a QR code ?Point your camera at a QR code someone sent you, or upload a screenshot/photo of one — the encrypted text will be read straight into the box above.

Camera access needs your permission, and works best on https:// pages.

Password ?Anyone who wants to unlock this text will need this exact password.
Confirm password
Password strength: —
Cipher: AES-256-GCM (authenticated) · Key derived with PBKDF2-SHA256 (60,000 iterations) using your browser's native encryption engine — fast, and far stronger against brute-force than a single hashing round. ?This is a real security upgrade, not just a label: deriving the encryption key takes real computational work, which makes large-scale password-guessing attacks dramatically slower.
Second password
Both passwords will be needed to unlock this message. Store them separately for maximum security.
Self-destruct ?After this time, the message can no longer be decrypted — even with the right password.
Password hint (optional) ?Shown to anyone with the encrypted text, before they enter a password. Never put the password itself here.
Overall protection: Basic Set a stronger password to improve this score.

Result
Cover image (optional)

Leave empty and we'll auto-generate a suitable image. PNG output only — JPEG, WhatsApp, and other apps that recompress images will destroy the hidden data, so share the downloaded PNG file directly.

Scan to copy the encrypted text on another device.

Keep creating

Message locked? Share it as a QR code QR Code Generator Fancy another code? Try Morse code Morse Code Translator Want to hide text? Try invisible text Invisible Text Generator

About this generator

This generator makes a message that can only be opened one time on a device, or that stops opening after a chosen time. The one-time rule is tracked in the browser of the person who opens it, and the time limit is checked against their clock. That makes it useful for casual privacy, but it is not a guarantee: someone could still copy the encrypted text before opening it. Treat it as a convenience on top of strong encryption.

How to use this tool

  1. 1

    Write your message

    Type the message and a password.

  2. 2

    Choose open once or an expiry

    The advanced options are already open. Open once is selected.

  3. 3

    Share it

    Send the link or text. After it is opened once, that device will not open it again.

Frequently asked questions

Is it truly self-destructing?
The rule is checked on the device that opens the message. It cannot delete copies of the encrypted text, so use it as an extra layer, not as a promise.
How does the time limit work?
The expiry time is stored inside the encrypted message and checked when it is opened, using the opening device's clock.
Can I still read it if I forget the password?
No. Without the password the message cannot be opened at all.

More text encryption tools

Text Encrypt & Decrypt Hide Text in Image Encrypted QR Code Encrypt WhatsApp Messages Double Encryption Encrypt Text Decrypt Text AES-256 Encryption Password Protect Text Secret Message Encoder

Related tools

QR Code Generator Invisible Text Generator Morse Code Translator