Online Notepad
A serious in-browser notepad: multiple notes with auto-save, optional markdown preview, full-text search across notes, focus and dark mode, AES-256-GCM password encryption per note (with PBKDF2 key derivation, 250k iterations) and one-click export to .md or .txt. Notes stay on your device — nothing is uploaded.
Notes are saved only to your browser's localStorage on this device. Nothing is uploaded. Locked notes are encrypted with AES-256-GCM. Export important notes — clearing site data or private mode will lose them.
How to use this online notepad
- Open the page — your last note loads automatically (or a Welcome note on first visit).
- Click + New for additional notes; pick any from the sidebar (full-text searchable).
- Toggle Markdown preview, dark mode or focus mode as needed.
- Click Lock with password to encrypt a sensitive note (AES-256-GCM).
- Use Download or Export all to keep a backup outside the browser.
Frequently asked questions
Where are my notes stored?
In your browser's localStorage on this device only. They're tied to this browser — clearing site data, switching browsers, or private/incognito mode will lose them. For long-term storage, export.
How does the password encryption work?
Your password is converted to a 256-bit AES key with PBKDF2-SHA-256 (250,000 iterations and a fresh random salt per lock). The note text is then encrypted with AES-GCM and only the ciphertext is stored. The plaintext is never written to disk.
What if I forget the password?
There is no recovery — that's the point of strong encryption. The note is unrecoverable. Keep the password somewhere safe (e.g. a password manager).
Can I sync notes between devices?
Not directly — that would need a backend, which this site doesn't have. Use Download or Export all to move notes to another device.
Are notes really private?
Yes from a network point of view — nothing leaves your browser. Anyone with access to your browser profile (and not a password-locked note) can read them, so use locking on shared devices.