Online Guitar Tuner

Grant microphone access to detect pitch locally and tune standard E A D G B E guitar strings.

Tuning

Reference A4

Input

—

Waiting for microphone

−50¢ flatin tune+50¢ sharp

—Cents

—Target

—Nearest string

—Signal

Pitch detection runs locally in your browser. A quiet room and a clean single note improve stability. Microphone permission is required.

How to use this Online Guitar Tuner

Tune a guitar through your microphone with live pitch, note, cents, and string guidance. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.