TuneIt is a free, browser-based instrument tuner designed for musicians of all levels. No downloads, no sign-up — just open the page and start tuning.
TuneIt uses your device's microphone and the Web Audio API to capture sound in real time. A mathematical technique called autocorrelation analyzes each audio frame to identify the fundamental frequency of the note you're playing, then displays it on a semicircular needle meter with cent-level accuracy.
Chromatic — any instrument, any key. Auto-detects the nearest semitone.
Guitar — E2 A2 D3 G3 B3 E4 (standard tuning)
Bass — E1 A1 D2 G2
Ukulele — G4 C4 E4 A4
Violin — G3 D4 A4 E5
Auto string detection highlights the string you're playing in real time. You can also manually lock any string as a reference. Theme preference (light/dark) is saved locally in your browser.
All audio processing happens entirely in your browser. Your microphone input is never transmitted to any server. See our for full details.
Questions or feedback? Use the GitHub Issues page.
Last updated: May 2025. This policy explains how TuneIt collects, uses, and protects information when you use this website.
TuneIt requests access to your microphone solely to detect pitch. All audio processing is performed locally in your browser using the Web Audio API — no audio data is ever recorded, transmitted, or stored on any server.
TuneIt stores only your theme preference (light/dark) in your browser's localStorage. This data never leaves your device. No tracking cookies or session cookies are set by this application.
This site uses Google AdSense to display advertisements. Google and its partners may use cookies to serve ads based on your prior visits to this or other websites. Google's use of advertising cookies enables it and its partners to serve ads to you based on your visit to our site and/or other sites on the Internet.
You may opt out of personalized advertising by visiting Google Ads Settings or www.aboutads.info.
TuneIt is not directed at children under the age of 13. We do not knowingly collect personal information from children.
This site uses Google Analytics to collect anonymised usage data such as pages visited, session duration, and device type. No personally identifiable information is collected. You can opt out by installing the Google Analytics Opt-out Browser Add-on.
TuneIt does not collect or retain any personal data. The only data stored is your local theme preference, which you can clear at any time by clearing your browser's localStorage.
We may update this Privacy Policy from time to time. Any changes will be posted on this page with an updated date.
For any privacy-related questions, please use the GitHub Issues page.