Local Secure Notes
Notes encrypted in your browser
Browser-only processing
Related tools
More browser-based tools for this workflow.
What this tool does
Write notes that stay in your browser only — never uploaded. AES-encrypted with your passphrase.
Local Secure Notes is a free security utility that gets the job done without installing software or creating an account. The whole process runs inside this browser tab, so your input never leaves your device. Common searches that land here include local notes, secure notes.
Key features
- AES-GCM encryption with a key derived from your passphrase via PBKDF2
- Notes are stored only in localStorage on this device — never on a server
- Wipe button clears all encrypted data locally with one click
Common use cases
- Jotting down a sensitive snippet you don't want in a plain notes app
- Holding a recovery phrase or PIN temporarily on a trusted device
Things to know
- Losing the passphrase means losing the notes — there is no recovery
- Notes do not sync between devices; clearing browser storage erases them
- Browser localStorage is not a hardware-secured vault — use a real password manager for long-term secrets
Privacy & local processing
Local Secure Notes processes everything inside your browser — your files and text are never uploaded to a server, never logged, and never shared with third parties.How to use Local Secure Notes
- 01
Set a passphrase.
- 02
Write your notes.
- 03
Notes save encrypted to localStorage.
Frequently asked questions
Is my data uploaded anywhere?
No. Every tool on WebToolsLabs runs entirely inside your browser. Your data never leaves your device.
Is this tool free?
Yes. All tools on WebToolsLabs are 100% free with no signup, no watermarks, and no usage limits.