Tools

Free music tools for musicians

Generators, references, trainers, and instruments — free in your browser. New tools are landing soon; here's what's coming.

Generators

Soon

Chord Progression Generator

Generate chord progressions in any key, hear them played back, and use them as songwriting starting points.

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Reference

Soon

Interactive Circle of Fifths

Explore keys, key signatures, relative minors, and chord relationships with an interactive circle of fifths you can click and hear.

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Soon

Music Scales Tool

Look up any scale or mode, see its notes and formula in any key, and hear it played.

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Soon

Chord Player

Play and hear any chord in any voicing and inversion.

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Trainers

Soon

Interval Memorizer

Memorize musical intervals by ear with song references and focused drills.

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Soon

Sight Singing Trainer

Practice sight singing with generated melodies, solfege, and pitch feedback.

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Soon

Vocal Warmup Tool

Warm up your voice with guided exercises, piano-led scales, and lip trills tailored to your range.

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Tests

Soon

Vocal Range Test

Find your vocal range and voice type with a guided microphone test.

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Soon

Perfect Pitch Test

Test whether you can identify notes without a reference.

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Instruments

Soon

Virtual Piano Keyboard & Recorder

Play a virtual piano in your browser with your mouse or keyboard, and record what you play.

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Train your ear while the tools roll out

Download Coco and start a short ear-training session today.

Free to start · iOS & Android · or play on the web