ChordProgressions.org

ChordProgressions.org is a free browser studio for guitarists, pianists, songwriters, and music-theory learners working with chord progressions. It is best for people who want creation, analysis, practice, and export tools together rather than a single-purpose chord reference. Its broad workflow comes with one key constraint: studio playback and editing require JavaScript.

Overview

The studio takes a progression from discovery or creation through voicing, theory analysis, practice, and export. That range suits songwriters moving between an idea and a playable arrangement, as well as learners who want to understand why a sequence works. It is less suitable for someone who needs only a static reference or wants a dedicated desktop application.

Projects autosave in the browser and stay on the device; imported files are read there and never uploaded. That local workflow is useful for private or unfinished material. The progression library, key reference, theory articles, and chord tables remain accessible as plain HTML without JavaScript, but playback and editing do not.

Key features

Find, build, and understand

A generator, builder, finder, identifier, analyzer, and transposer cover both starting a progression and investigating one already in hand. Reverse chord lookup helps when a player knows a chord and wants to find progressions that use it. The library offers more than 130 patterns across genres, providing a broad set of starting points without requiring a blank-page approach.

The analyzer can show Roman numerals, Nashville numbers, chord functions, cadence points, borrowed chords, and a key estimate with a confidence rating. This is more useful for learning and revision than a bare chord-name display, though the estimate should be treated as a guide rather than a definitive reading.

Instrument voicings and practice

Guitar shapes and piano voicings can be customized by tuning, capo position, difficulty, inversion, and fingering. Those controls make the same progression more adaptable to different players and arrangements. The practice tool loops progressions with a metronome and count-in, and includes ear-recognition and playing exercises in every key; that gives learners a way to move from analysis to repetition in the same workspace.

Audio, files, and export

The studio supports MIDI input and output, and imports MIDI, MusicXML, project files, and plain-text chord sheets. Audio decoding and analysis happen in the browser; the resulting chord timeline is an editable estimate with a confidence score, so it can help map a recording but should not be mistaken for an unquestionable transcription.

Exports include MIDI, WAV, chord-chart PDF, PNG and SVG diagrams, plain text, CSV, JSON, MusicXML, and a share link. This breadth is a practical advantage for moving material into other workflows. MIDI device input and output are supported, but no third-party service integrations are stated.

Pricing

ChordProgressions.org is free: its ChordProgressions.org plan costs nothing and provides a free in-browser studio. There is no free trial because the plan itself is free. That removes a payment barrier for learners and songwriters exploring a full progression workflow; the trade-off is that JavaScript is required for studio playback and editing. The plan description gives no seat or usage quota, so those should not be assumed.

Platforms

The product runs on the web. Its studio functionality depends on JavaScript, while the progression library, key reference, theory articles, and chord tables work as plain HTML without it. It supports guitar and piano voicings, MIDI device input and output, and imports including MIDI and MusicXML.

Who it's for

Songwriters can use the generator, builder, pattern library, voicing controls, and export formats to develop and carry progressions forward. Guitarists and pianists benefit from instrument-specific shapes and voicings, while theory learners get multiple analytical views and practice in every key. It is a weaker fit for people seeking a JavaScript-free editing studio, a desktop-native application, or only a quick static chord lookup.

Pros and cons

• Pros: A wide set of creation, analysis, practice, and export tools sits in one free browser studio, reducing the need to switch between separate progression tasks.
• Pros: Projects and imported files stay in the browser rather than being uploaded, a useful privacy property for personal work.
• Pros: Instrument voicings, theory views, and editable audio-analysis results give users control over both arrangement and interpretation.
• Cons: Playback and editing require JavaScript, limiting the studio's usefulness in environments where scripts are disabled.
• Cons: Audio analysis produces an estimate with a confidence score, so users must review and edit its timeline rather than rely on it as a final transcription.

Alternatives

For a wider category comparison, see Chord Finder Software. Pick OtoTheory if an iOS app or web access and a lifetime purchase are more important than this free browser studio; its free iOS tier limits sketch saves to three and excludes MIDI and audio export. Choose ChordU for Android or iOS access and song uploads, MusicOnly mode, and downloads through Premium at $5 a month.

Chord Analyser is an Android and iOS option for readers who prefer a mobile app. chords·lol is another free web option for those seeking an educational and reference resource without signup. Choose Chordify if access to songs and its Toolkit across web, iOS, and Android better fits your workflow; its Basic plan costs $24 a year. ChordSequence is a free Android and web alternative with all features and WAV and MIDI export. Chordio is for readers looking for an iOS or macOS app with built-in sounds, an on-screen keyboard, and real-time MIDI chord detection. SongEngine is a macOS and Windows option centered on a core plug-in with 60+ presets.

Verdict

ChordProgressions.org is a strong choice for songwriters and music learners who want a free, locally handled browser workspace spanning progression creation, theory, practice, and flexible export. Its main limitation is the JavaScript dependency for studio playback and editing; look elsewhere if that prevents use or if a native mobile or desktop app is essential.