AES-256-GCMZero KnowledgeWeb Crypto APIClient-Side

Frequently Asked Questions

How secure is this?
This uses AES-256-GCM encryption via the Web Crypto API, which is the same standard used by banks and governments. The security depends on your password strength.
Is my data sent to any server?
No. All encryption and decryption happens entirely in your browser. Nothing is transmitted or stored on any server.
What if I forget the password?
The message cannot be recovered without the password. There is no backdoor or recovery mechanism.
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About Secure Note

Secure Note is a free, browser-based utility designed to make privacy checks as quick and frictionless as possible. Processing runs locally in your browser using modern Web APIs. Nothing is uploaded, nothing is logged, and there is no quota to worry about for casual use. If you find yourself doing this regularly, the rest of the utility suite covers most adjacent tasks with the same approach.

When you'd reach for Secure Note

  • You're cleaning up a folder of files that accumulated over a project and need to standardize them.

    Designers, writers, and developers wrapping up deliverables.

    Drop each file in, copy the output, move on.

  • You're hitting the daily limit of a paid SaaS and need a backup option for a single quick job.

    Marketers and ops people whose primary tool is metered.

    Stay productive without burning credits.

  • You need to handle a one-off task right before a meeting and don't have time to install anything.

    Anyone working remotely on a borrowed or restricted machine.

    Open the page, get the result, paste it into your doc — under a minute.

  • You're on a public or shared machine and don't want to leave traces of what you're working on.

    Travelers, contractors, anyone working from a friend's computer.

    Nothing is uploaded, nothing persists if you're not signed in.

Frequently asked about Secure Note

Can I use Secure Note commercially?
Yes. The output of Secure Note belongs entirely to you, with no licensing restrictions.
Are my files uploaded to a server when I use Secure Note?
Secure Note processes everything in your browser using local APIs. Your files never leave your device.
Will Secure Note change my original file?
Never. Secure Note only reads your input file and produces a new output file.
What browsers does Secure Note support?
Every modern browser released in the last three years: Chrome, Firefox, Safari, Edge, Brave, Opera.
Does Secure Note work on mobile?
Yes, Secure Note is fully responsive and tested on iOS Safari and Android Chrome.