Fifteen tools · All free · All in the browser
The tools.
These are not stripped-down demo tools built to collect an email address. They work in the browser, they explain what they are showing you, and they are free. Audio is generated on your device, and the tuner's microphone data never leaves it.
Choose by the problem
You do not need to know the tool's nameMy guitar is out of tune
Use the tuner for the pitch, then check the setup and stringing guides if the note will not stay there.
I do not know what chord I am holding
Select the notes you are playing and compare the strongest chord names, inversions, and possible contexts.
I have chords but do not know the key
Enter the progression and see which keys explain it best, including cases where more than one answer is honest.
I need notes that fit a key or chord
Map the scale on the fretboard, then use the soloing lesson to turn the map into phrases instead of exercises.
My timing drifts or feels stiff
Practice with a click or groove, change the subdivision, and expose where the beat is actually being lost.
I need a song key that fits my voice
Run the guided singing test, then treat the result as a useful starting range rather than a permanent label.
Start with a goal
Chromatic tuner
Autocorrelation pitch detection accurate to a single cent, with 42 tunings covering six-string, baritone, seven- and eight-string, bass, ukulele, mandolin and banjo. Adjustable reference pitch from 415 to 466 Hz, auto or manual string targeting, and a reference tone for every string.
TimeMetronome & drum beats
Sample-accurate scheduling so the click doesn't drift. Nineteen grooves including shuffle, half-time shuffle, 12/8 blues, train beat, bossa, Motown, 7/8 and 5/4, each one editable step by step. Swing slider, tap tempo, count-in and a per-voice mixer.
HarmonyChord library
Choose a root and every chord built on it appears, grouped into major, minor, dominant, suspended, sixth, diminished, altered and power families. Open-position fingerings sit beside movable shapes, and every card plays back a real strum.
FretboardScales & fretboard explorer
Draw any scale or mode across the whole neck with intervals labeled, root notes highlighted and the five box positions outlined. Works in any tuning, plays back ascending and descending, and shows you which chords come out of the scale.
EarTuning by ear
The fifth fret method walked through one string at a time with audio for each pair, the harmonic and octave cross checks, a lab where you can hear beat frequencies slow to nothing, and the history of how the world landed on A = 440 Hz.
TablatureRead guitar tab
The six lines, fret numbers, chords, and every technique symbol, hammer ons, pull offs, bends, slides and palm mutes, explained simply with real examples. No music theory required.
EarNote trainer
Calls out notes at random and you find them on the neck. Set the strings and the fret range you want to drill, pick your pace, and work the whole fretboard until the names come without thinking.
NotationRead sheet music
Standard notation from the ground up. The staff, both clefs, note values and rests, dotted notes and ties, time signatures and counting, repeats and chords, with audio throughout and printable staff paper at the end.
TheoryCircle of fifths
Click any key to see its signature, how many sharps or flats it carries, its relative minor and the chords that belong to it. The quickest way to work out what fits together in a given key.
SongwritingKey finder
Click the chords you already know are in your song and this works out which keys they could belong to, then hands you the rest of the chords and the strongest notes for a melody or solo.
SongwritingChord looper
Pick a key, click in a progression, and loop it with a straight, swing, or shuffle feel. Practice soloing, write lyrics, or test a progression before you commit to it.
EarPerfect pitch trainer
Two tones play and you say which was higher. The gap narrows from a whole tone down to a couple of cents, so you find the real limit of what your ear can hear, and train it wider.
EarPerfect pitch test
You hear middle C once, then ten random notes to name. Close answers still score, and you see the right answer every time.
EarVocal key finder
A guided singing test that finds your comfortable range and the key your voice actually sits in, with real pitch tracking and a full report.
ChordsWhat chord is this?
Click the frets you are holding down and it names the chord, including inversions and slash chords, with the notes and intervals so you can see why.
CourseThe building course
The other half of the site: twelve full length written guides, each paired with its video, covering the whole process of building an electric guitar from the first drawing to the final wiring.
A note on how these work
Every tool here is a single page of HTML and JavaScript. There is no server doing the work, no audio uploaded anywhere, and no tracking beyond basic analytics. Once a page has loaded it will keep working with the network off, which is useful in a rehearsal room with bad signal.
The tuner needs microphone permission and a secure connection. If you have opened one of these files directly from your hard drive rather than over the web, the microphone will not start, that is a browser rule, not a bug.