Privacy
Keys Wizard does not collect data about you. Your songs, your notes, and your microphone sound stay in your browser.
Last change: November 14, 2026.
The short version
- There are no accounts.
- There are no ads.
- There are no cookies.
- There is no analytics and no tracking.
- The app does not upload your song files.
- The app does not record or send sound from your microphone.
What stays on your computer
The app keeps these things in your browser. They do not go to a server.
| What | Where | Why |
|---|---|---|
| The song files that you open | Browser storage (IndexedDB) | To show them in “Your songs” the next time |
| Your settings | Browser storage (localStorage) | To remember the keyboard size, the volume, and the mode |
| The notes from your MIDI keyboard | Memory, while the page is open | To know which key you played |
| The sound from your microphone | Memory, while the microphone is on | To find the pitch of the note. The sound is not saved. |
Permissions
The browser asks for your permission before the app can use a MIDI keyboard or the microphone. The microphone is off until you select the microphone button in the top bar. You can remove a permission in the settings of your browser at any time.
What the host can see
Vercel hosts this site. When your browser gets a page, the Vercel servers receive the usual technical data of a web request, such as your IP address, the page address, and the name of your browser. Vercel can keep this data in its logs. I do not use it to identify you. Read the Vercel privacy policy.
The page does not load fonts, scripts, or pictures from other companies. Links to other sites, such as GitHub, open only when you select them.
How to remove your data
- To remove one song: on the start page, select ✕ next to the song.
- To remove all data: in your browser, clear the site data for this site.
Children
The app is safe for all ages. It does not ask for a name, an email address, or other personal data.
Changes
If the app starts to use data in a different way, I will change this page first and put the new date at the top. The history of this page is public on GitHub.
Questions
Open an issue on GitHub, or find me at antoniwan.online.