Encrypted Note
Write a note, encrypt it in your browser and share it as a private link. The text is turned into unreadable data before it goes anywhere, and the key stays inside the link.
How we keep your files private
How to use Encrypted Note
- Type or paste your note. Add a password if you want a second lock, and pick an expiry.
- Press Create private link and copy the link or show the QR code.
- Send the link. When the other person opens it, their browser decrypts the note on their own device.
Common uses
- Sharing a Wi-Fi password, an account recovery code or an API key with one person.
- Sending a private message that should not sit in plain text in a chat history.
- Passing a note from your phone to your computer without an app.
- Sharing sensitive instructions that you protect with a password sent through a different channel.
About this tool
The note is encrypted with AES-GCM, a modern standard, using a random 256-bit key generated by your browser. The encrypted text and the key are packed into the part of the link after the # sign, which browsers never send to websites. Our servers therefore never see the note or the key, and we do not store anything.
If you set a password, the key is derived from it with PBKDF2 (300,000 rounds) and is not placed in the link at all, so the link alone is useless without the password. Choose a long password and share it by a different route than the link.
Be aware of what this cannot do: there is no server to delete the note, so the link works for anyone who has it until it expires, and the expiry date is checked by the reader's browser rather than enforced by a server. Treat the link like the note itself, and avoid pasting it into places that log links.
Privacy. Everything runs in your browser. We never receive your files or notes.
Related tools and guides
Frequently asked questions
Can you read my note?
No. The note is encrypted before it leaves the page and the key is in the part of the link that is never sent to our servers.
Does the note disappear after it is read?
No. There is no server to delete it. The link keeps working until it expires, so share it only with people you trust.
How secure is the password option?
It uses PBKDF2 with 300,000 rounds and AES-GCM. A long, unique password makes guessing impractical. A short password is much weaker.
How long can a note be?
Up to 20,000 characters. Long notes make long links, and some chat apps cut very long links, so shorter notes travel better.
Where is the note stored?
Nowhere except inside the link itself. If you lose the link, the note cannot be recovered.
Can chat apps or browsers see the link?
The app you paste it into can, and your browser history may keep it. That is why a password is worth adding for sensitive notes.
Does it work offline?
Yes, once the page has loaded: all encryption happens in your browser.