Drop in a tab file and get it back with the harmony stamped above every bar, a strummed backing track, humanized playback, and the lazy authoring defaults fixed. Works with .gp3 / .gp4 / .gp5 / .gpx / .gp tab files, and with MusicXML from any notation app. Around it: a library that makes your whole collection searchable, playable and key-aware, plus a Learn hub that turns theory into files you can play.
e|-------0-------0---|-------1-------1---| B|-----1-------1-----|-----1-------1-----| G|---2-------2-------|---2-------2-------| D|-------------------|---3---------------| A|-0-----------------|-------------------| E|-------------------|-------------------|
Am Dm7
e|-------0-------0---|-------1-------1---|
B|-----1-------1-----|-----1-------1-----|
G|---2-------2-------|---2-------2-------|
D|-------------------|---3---------------|
A|-0-----------------|-------------------|
E|-------------------|-------------------|
Chord names and fingering diagrams, voiced near where the part actually sits on the neck, including mid-bar changes when the harmony moves inside a bar.
The short version is below; the full guide covers every option, the library, and the practice files.
.gp3 – .gp5, .gpx, .gp or MusicXML
backing track, humanize, polish, lyrics
an enriched .gp5 your music software opens
Evidence from every track, weighted by duration and downbeats. A chord is only named when its defining tones are actually there. No fantasy 7ths. Mid-bar changes get their own stamp.
Open shapes near the nut, real barre and 7th grips up the neck, voiced near where the part is played. Alternate tunings handled.
A muted rhythm track on its own mixer channel, following the detected changes in any meter. Unmute it and jam over your own tab.
Downbeat accents and natural dynamics; fixes center-panned mixes, missing letRing on arpeggios, and channel collisions, but only where the author left defaults.
Paste lyrics and they land in the native lyric lanes, with section markers, anchored to any bar you choose.
Your file is processed in memory and deleted the instant your download starts. No library, no sharing, no analytics on your music. It's your file; it only ever returns to you.
Point the Library at your tab folder once: tens of thousands of files index in seconds, entirely in your browser. Your files stay on your machine; the only one that ever travels is the one you stamp.
Type three letters and it's already there, with album art per artist, A–Z jumps, and deep links you can bookmark.
One click detects a song's key and progression; another opens Learn in that key, with scales, CAGED map and jam sheet already set.
Full notation preview with playback, right in the browser. No more opening five files to find the right one.
Per-song stamping, or batch a whole artist (even your entire starred tab), with outputs saved beside your originals.
Drills generated from Learn land here as real tab files: preview them, export them, keep them across visits.
Practice files, detected keys and settings export as one .zip you keep. Favourites, stars and stamps survive every refresh.
The Learn hub has one goal: get you past needing lessons. Interactive CAGED and scale maps, a live circle of fifths, ear training, and a weekly practice plan, where every drill, loop and scale is one click from becoming a real tab file in your library: the theory page and your practice folder are the same place. Free, no account, works in any key you throw at it.
The engine is validated against a corpus of tens of thousands of real tab files spanning three decades of formats, and scored against thousands of bars hand-annotated by human transcribers, with 98% agreement on chord quality where a comparison exists. When it isn't sure, it says nothing rather than guessing wrong.
A chromatic tuner in the browser. Mic in, needle out. Tune by ear against reference notes in Learn, then check yourself here.
Noir, olympic white, sunburst, crimson: the little guitars in the nav re-skin every page, tools included.