How to Encrypt
1
Click Encrypt and type or paste the text you want to protect.
3
Enter a strong password to lock the message.
4
Press Submit again, then copy the result.
How to Decrypt
1
Click Decrypt and paste the encrypted Base64 text.
3
Enter the password used during encryption.
4
Press Submit again to reveal the original text.
⚠️ If you lose your password there is no recovery option. Keep it somewhere safe.
Clear Button
Press Clear at any time to reset all fields, the output, and your clipboard.
A confirmation prompt will appear before anything is wiped.
Encryption
AES-256-GCM — authenticated encryption that protects confidentiality and detects tampering.
PBKDF2-SHA256 with 100,000 iterations — hardens your password against brute-force attacks.
Random salt & IV per encryption — the same text and password never produce the same output twice.
Your data is yours. Learn how to decrypt messages
independently without this app:
Decryption Guide
Privacy & Storage
Fully offline. Outbound connections are blocked by Content Security Policy — nothing is sent anywhere.
Zero storage. No cookies, localStorage, or saved passwords are ever used.
Clipboard. Other apps may read clipboard contents — only copy when appropriate.
Once text leaves this tool — via clipboard, email, or file — it is outside this tool's control.
Open Source
Fully open source under GPL v3. Anyone can inspect and verify the complete source code.
☕
Like this tool? Support its development!
This tool is completely free and open-source. If it saves you time or keeps your data safe, consider supporting its development with a small donation. Every coffee helps!
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Overview
Fully local. This app works entirely on your device.
No data collection. No personal data, analytics, or identifiers are collected.
No transmission. Nothing you enter is sent anywhere.
Encryption & Decryption
On-device processing. Encryption and decryption are performed locally using the Web Crypto API.
Your secrets stay local. Your text, password, and output never leave your device through this app.
Clipboard
Paste. Reads clipboard content only when you choose to paste.
Copy. Writes the result to your clipboard only when you choose to copy.
Clear. Can clear your clipboard when you choose Clear.
No background access. Clipboard data is not stored or accessed at any other time.
Network & Services
No internet use. The app makes no network requests.
No servers. It does not contact any backend or external service.
No third parties. No ads, analytics, crash reporting, or tracking SDKs are included.
All operations are fully offline. Nothing is uploaded, synced, or shared by this app.
Permissions & Storage
No device permissions. No access to camera, microphone, location, contacts, or storage is requested.
No saved data. No passwords, plaintext, ciphertext, or session data are written to persistent storage.
No leftovers. When you close the app, no session data is intentionally kept.
Policy
Children. Because no data is collected, this app poses no privacy risk to users of any age.
Updates. If this policy changes, the updated version will replace the current one.
Last updated: 17 April 2026
