This interactive circle of fifths chart helps users explore chords, keys, notes and the related circle of fourths.
JamStart
JamStart finds song keys, modes and tempos from a Spotify playlist, with chord, scale and circle-of-fifths charts.
About JamStart
JamStart is a web tool for musicians who want to know the key, mode and tempo of songs. It draws on Spotify's catalog, letting users search for a song, album or artist, or look up a public playlist by its playlist ID, and returns the key, mode, BPM and related charts for each track. Per-song information includes chord charts, scale charts and a circle of fifths chart with the diatonic chords.
Searching for a song and looking up a public playlist by ID are listed as public features. Features tied to your own playlists require logging in: getting keys and modes for songs in your playlists, viewing chord and scale charts per song, filtering songs by key or mode, and adding the filtered results to another playlist. The site says it can be tried for free, with a subscription for full features; pricing is not stated on the homepage. A privacy and end user agreement is linked from the page.
Key features
- Find key, mode and BPM for songs via Spotify's catalog
- Search songs by title, album or artist
- Look up public playlists by playlist ID
- Per-song chord, scale and circle of fifths charts
- Filter playlist songs by key or mode after login
- Export filtered songs to a new playlist
Best for: Musicians and jam-session players who want key, mode, tempo and chord information for songs in Spotify playlists.
Good for
- Combines key, mode, BPM and chord or scale charts for each song
- Filtering by key or mode can build new playlists around a single key
- Song and public playlist ID lookups are available without logging in
Watch out for
- Login is required for personal playlist features such as key and mode lists, charts, filtering and export
- The homepage asks how accurate the key and mode results are but does not answer it
- Full features require a subscription; pricing is not shown on the homepage
JamStart at a glance
- Website
- jamstart.app
- Category
- Lifestyle & Hobbies › Hobbies & DIY
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
JamStart alternatives
Tools and sites you could use instead, ranked by how closely they match.
The fretflip chart visualizes guitar, bass and ukulele scales in different keys and tunings on an interactive fretboard.
Piano Trainer by ZaneH teaches scales and chords with MIDI or QWERTY keyboard input and quiz modes.
My Fretboard Trainer teaches guitar notes, chords and intervals through quizzes, exercises and scale visualizations.
Hooktheory analyzes chord progressions across songs and shows common progressions and likely next chords.
ChordReader2 searches for chords, displays and transposes them, and saves chord charts on a phone.
Open source
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JamStart FAQ
What information does JamStart show for a song?
Each song is listed with its key and mode, BPM, and music charts including chord charts, scale charts and a circle of fifths chart with information about the diatonic chords.
Can I use JamStart without logging in?
Yes for some tasks. Searching for a song by name, album or artist and searching public playlists by playlist ID are listed as public features. Getting keys and modes for songs in your own playlists, viewing chord and scale charts, filtering by key or mode, and adding filtered songs to another playlist require logging in.
Can I build a playlist containing only songs in one key?
Yes, after logging in. The site lets you filter a playlist's songs by key or mode and add the filtered songs to another playlist, so you can create playlists such as ones with only C major or only minor songs.
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