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TestOnDevice

Instrument Tuners & Music Tools

In-browser tuners for guitar, bass, ukulele, strings and more, plus a chromatic tuner, pitch detector and metronome.

Guitar Tuner

Tune a 6-string guitar by ear or mic — standard EADGBE plus Drop D, DADGAD, Open G and more, with a cents-accurate needle.

Chromatic Tuner

A universal tuner that detects the nearest of all 12 notes for any instrument or voice, showing cents deviation.

Bass Guitar Tuner

Tune a 4- or 5-string bass (EADG, Drop D, BEADG). Built for the low notes down to ~31 Hz that trip up ordinary tuners.

Ukulele Tuner

Tune a ukulele in standard re-entrant gCEA, low-G, baritone DGBE or D-tuning, with reference tones for each string.

Pitch Detector

Read the exact detected frequency, nearest note, cents deviation and MIDI number from your microphone in real time.

Violin Tuner

Tune a violin in perfect fifths GDAE, with reference pitches (A = 440 Hz) and a precise cents readout for fine tuners.

Vocal Pitch Monitor

Sing and watch your pitch scroll across a note graph in real time — a practice aid for hitting and holding notes.

Alternate Guitar Tunings

Tune to Drop D, Drop C, DADGAD, Open G, Open D and Eb, with a string-by-string reference table for each preset.

BPM Tap Tempo

Tap along to any song to find its tempo in beats per minute — no microphone needed, works fully offline.

Viola Tuner

Tune a viola in fifths CGDA — a fifth below the violin — with reference tones and fine cents accuracy for its darker low C.

Cello Tuner

Tune a cello in fifths CGDA, an octave below the viola. Optimized for the low C near 65 Hz with a clear, steady readout.

Banjo Tuner

Tune a 5-string banjo in Open G (gDGBD), Double C, Drop C or G Modal, accounting for the short high 5th-string drone.

Mandolin Tuner

Tune a mandolin’s four paired courses to GDAE (same notes as a violin), matching each pair to a clean unison.