Skip to content
InstaFontStudio
100% BROWSER-BASED · NOTHING EVER LEAVES YOUR DEVICE
v7.0

Password Protect Text Online

Lock a note, message or list behind a password so only people who know it can read it.

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

Sometimes you just want to keep a note private: a list of ideas, a diary entry or something you are sending to a friend. Paste the text, choose a password and the tool locks it with AES-256. The result looks like random characters and can be stored anywhere, even in a public place, because it cannot be read without the password.

How to use this tool

  1. 1

    Paste your note

    Add the text you want to keep private.

  2. 2

    Set a password

    Choose a password you will remember. It cannot be recovered.

  3. 3

    Store or send it

    Save the locked text in a note, a document or send it to someone you trust.

Frequently asked questions

Can I password protect a whole document?
This tool locks text. For a long document, paste the text in, or use a file encryption app for files.
Where can I store the locked text?
Anywhere, since it is unreadable without the password. Do not store the password in the same place.
Can someone guess the password?
They can try, which is why long passwords matter. The tool slows guessing down with PBKDF2.

More text encryption tools

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

Related tools

QR Code Generator Invisible Text Generator Morse Code Translator