無料オンラインメモ帳 - メモを書く、保存する、暗号化する｜Absolutool
Write, edit, and save text · multiple tabs, auto-save, encryption & focus mode.
Encrypt this note with a password. Uses AES-256-GCM · everything stays in your browser.
How does auto-save work?
Your text is automatically saved to your browser's local storage every time you stop typing for half a second. It persists between sessions · close the tab and come back later, your notes will still be here. Each tab saves independently, and you can add more with the + button. Clearing your browser data will erase saved notes.
Is my text private?
Yes. Everything stays in your browser. No text is ever sent to any server. For extra security, use the Lock button to encrypt a note with a password · it uses AES-256-GCM (the same standard banks use) and the encryption happens entirely on your device.
How does password encryption work?
Click the Lock button, enter a password, and click "Encrypt & Save." Your note is encrypted using AES-256-GCM with a key derived via PBKDF2 (100,000 iterations). The encrypted text replaces your note in storage. To read it again, enter the same password and click Decrypt. If you forget the password, the note cannot be recovered · that's the point of real encryption.
Want a fully private workspace?
For a truly private, encrypted workspace beyond what any browser can offer, consider using Standard Notes (free, open-source, end-to-end encrypted), Joplin (free, encrypted sync across devices), or CryptPad (zero-knowledge collaborative editing). These tools encrypt your data so that even the service provider cannot read your notes.