AES-GCM Secure Encrypted Notepad
Author, encrypt, and decrypt custom text files locally using secure AES-GCM 256-bit password-based encryption.
🔒 Processed entirely in your browser — nothing you enter here is ever uploaded.
The result appears on this page after you run the tool. Nothing you enter is uploaded.
Result
About this tool
Need to store confidential credentials, personal journals, or secure project notes without trusting cloud storage? This offline encrypted notebook secures texts locally.
A standout capability is the Self-Decrypting HTML exporter: download notes as a single, offline HTML file. When opened, it displays a password prompt that decrypts the message locally via native WebCrypto APIs.
For physical security, the Autoshredder monitors inactivity. If the tab sits idle for 5 minutes, it automatically shreds the inputs and state memory, protecting against shoulder surfing.
Example. Encrypting a note with a password writes a single line that starts with ENC: followed by base64 salt, IV, and ciphertext.
Limit. Key setup is PBKDF2-SHA-256 for 10000 iterations, and text that does not start with ENC: cannot be decrypted.