Theory, tempo, and tuning
Music tools
Chords, keys, degrees, metronome, BPM, and tuners for music practice.
When you need to quickly understand the key of a progression, label chord degrees, or check which triads belong to a scale, a full notation editor is often too much.
Music tools run locally in the browser and help with harmony, tempo, and instrument tuning without dedicated music software.
This category includes chord analysis, key chord building, metronome practice, BPM tapping, instrument tuners, and approximate key detection from audio.
Music tools in this category
17 tools
Audio Key Detector
Estimate the musical key of an uploaded audio file with local browser analysis.
- Music theory analysis
- Degree and function labels
- Local browser processing
Bass Guitar Scale Fingering
Scale patterns for 4-string bass by position: one-finger-per-fret or Simandl 1-2-4 fingering, with roots, note names and degrees on the fretboard.
- Major, three minor forms, pentatonics, and blues
- One-finger-per-fret or Simandl 1-2-4 system
- Open position plus positions I-IX on a 4-string neck
Violin, Cello and Double Bass Scale Fingering
First-position scale fingerings for violin, viola, cello, and double bass: which finger plays each note, on which string, with low and high placements marked.
- Violin, viola, cello, and double bass
- Major, natural, harmonic, and melodic minor
- First-position fingering with placements and extensions
Tap BPM Counter
Determine the tempo of music (BPM) in real time with simple keystrokes.
- Start, pause, reset, and adjustment controls
- Readable timing display
- Local session state with no account required
Chord Chart Transposer
Paste a chord chart with lyrics and shift every chord by semitones, with a real chord-symbol parser and enharmonic-aware sharp/flat spelling.
- Chord-symbol grammar parser: root + quality + extensions + slash-bass
- Enharmonic-aware sharp/flat spelling based on the transposition amount
- Whitespace- and alignment-preserving text output
Chord Key Finder
Find likely major or minor keys from a typed chord progression with scale-degree labels.
- Music theory analysis
- Degree and function labels
- Local browser processing
Guitar Chord Diagrams
Type any chord name — Cmaj7, F#m7b5, G/B, anything — and get real, computed fretboard chord-box diagrams from a brute-force voicing search, not a static lookup image.
- Live chord-name parser with instant validation as you type
- Backtracking search across a sliding fret window, base fret 0 through 9
- SVG chord-box diagrams with open, muted, and barre markers
Guitar Scale Fingering
Map any scale onto the guitar fretboard by position: fingers 1-4, root markers, and the positions that cover the whole scale — for classical and any six-string guitar.
- Major, three minor forms, pentatonics, and blues
- Open position plus positions I-IX with a shaded window
- Finger, note-name, or degree labels on every dot
Guitar and Ukulele Tuner
Tune guitar, ukulele, bass, violin, and mandolin with live microphone pitch detection.
- Music theory analysis
- Degree and function labels
- Local browser processing
Interval Ear Trainer
Hear two live-synthesized notes, name the musical interval, and let adaptive difficulty focus practice on your weakest intervals.
- Melodic and harmonic playback modes
- Adaptive difficulty weighted by your live accuracy
- Per-interval correct/wrong/accuracy breakdown table
Key Chord Builder
Build the diatonic chords of a selected key and label every degree with its harmonic role.
- Music theory analysis
- Degree and function labels
- Local browser processing
Metronome
Professional online metronome with selection of tempo and sound accents for rehearsals.
- Start, pause, reset, and adjustment controls
- Readable timing display
- Local session state with no account required
Piano Scale Fingering Chart
See the standard fingering for any major or minor piano scale on an interactive keyboard — right hand, left hand, one or two octaves, with thumb-under crossings marked.
- All 12 keys, major plus three minor forms
- Right hand, left hand, or both together
- One- or two-octave fingering with crossings marked
Rhythm Sight-Reading Trainer
Practice reading and tapping random rhythms with real, measured timing-accuracy feedback.
- Random rhythm generator for 4/4, 3/4, and 6/8 with quarter, eighth, sixteenth notes and rests
- Precise click-track playback and tap capture built on the Web Audio clock
- Per-note timing table with an overall rushing/dragging verdict and an average error score
Step Sequencer
Program a 16-step drum beat with kick, snare, hi-hat, and clap, then export it as a real WAV file.
- 16-step grid for kick, snare, hi-hat, and clap with adjustable tempo and swing
- Live looping playback driven by a precise Web Audio lookahead scheduler
- One-click WAV export rendered offline at full quality
Guitar & Bass String Tension Calculator
Calculate the real pulling tension of a guitar or bass string in lbs, kg, and Newtons from its gauge, your scale length, and the target note.
- Real physics for plain steel strings: cross-sectional area × steel density, no shortcuts.
- Transparent approximation for wound strings (nickel-wound, phosphor bronze, bass roundwound), labeled as an estimate.
- Quick-select scale length presets (Stratocaster, Les Paul, bass) plus free-form custom entry and note parsing in scientific pitch notation.
Ukulele Chord Diagrams
Type any chord name and see every playable ukulele chord shape in standard GCEA tuning — a real voicing search, not a static lookup chart, with every match you can page through.
- Live chord-name parser with instant validation as you type
- Near-exhaustive search of a sliding fret window, base fret 0 through 9
- Paged SVG chord-box diagrams with a running "showing N of M" count