ChordSequence

ChordSequence is a browser-based set of music tools for building and shaping chord progressions. It is best suited to songwriters, producers, students, and teachers who want to hear arrangements and export them without a subscription. Its strongest case is the combination of a full progression player and supporting tools at no cost.

Overview

The central player turns selected chords into an arrangement with drums, bass, piano, guitar, and synth. Chords can be reordered, grouped into song sections, and looped; instrument parts can also be edited within a rhythm. That makes ChordSequence more useful for developing an arrangement than a chord lookup tool alone.

The surrounding toolkit adds a chord finder, transposer, key detector, Circle of Fifths, tuner, metronome, guitar and bass tabs, and drum machine. Reverse chord lookup and progression generation extend its appeal for learners and writers working from either a sound or a starting idea. The breadth is convenient, though musicians who need only one specialized reference tool may prefer a focused alternative.

Key features

Playback and arranging

With 548 rhythms across styles such as pop, rock, salsa, and reggae, the player gives users a substantial range of grooves against which to try a progression. Section grouping and looping help when sketching song form, while the available instruments include guitar, piano, and ukulele. The rhythm count and variety are useful for exploration, but the central purpose remains arranging chord progressions rather than replacing a full production environment.

Mixing and export

Each instrument has its own volume, pan, mute, solo, EQ, and compression controls, with reverb applied to the whole mix. That offers meaningful control over a sketch before it leaves the browser. WAV export provides an audio version, while MIDI notes can be carried into a DAW for further work; chord chart export is also supported.

Additional tools

The site brings common composition and practice utilities together, from transposition and key detection to a tuner, metronome, and tabs. That makes it a practical hub for students, teachers, and songwriters who move between learning chords and testing ideas. It is not necessary to use the larger toolkit to benefit from the player, so users seeking only a progression sketch can stay focused on that core task.

Pricing

The Free plan costs nothing and includes all features, with no paywall or usage limit. WAV and MIDI export are included, so users do not have to move to a paid tier to save a finished sketch or continue it in a DAW. There is no free trial because the full product is free, and there are no stated seat or usage quotas to weigh against the plan.

This is an unusually straightforward fit for learners and independent writers who want to explore without committing to a subscription. The trade-off is not a cheaper tier with reduced functions; rather, users who need an iPhone app will need to work through the browser.

Platforms

ChordSequence runs in the browser using the Web Audio API and supports Chrome, Firefox, Safari, and Edge. The Android app works offline, requires no account, and supports Android 8.0 or later, which makes it the clearest option for composing without a connection. There is no iPhone app; iPhone users can use the browser player instead.

The maker says saved songs are private unless shared, and that the Android app stores songs on the device without uploading them. The site is hosted on Netlify and uses Supabase for its community song library database.

Who it's for

Songwriters and producers get the most from the progression player, arrangement controls, mixer, and exports. Music students, learners, and teachers can use the supporting reference and practice tools alongside playback. Worship teams may also find the ability to organize and loop sections useful when shaping a song structure.

ChordSequence is a weaker fit for anyone who requires a dedicated iPhone app or needs a full-featured DAW rather than a browser-based way to develop and export musical ideas.

Pros and cons

• Pros: The full feature set is free, with no usage limit or paywall, including WAV and MIDI export; that makes it practical for ongoing use rather than just a trial sketch.
• Pros: A 548-rhythm library, section editing, and instrument-level mixing give writers several ways to shape and compare arrangements.
• Pros: The Android app works offline and does not require an account, and songs remain on the phone according to the maker.
• Cons: There is no iPhone app, so iPhone users must rely on browser access.
• Cons: The browser player depends on a supported browser and its Web Audio API, so it is less suitable for users who want a standalone desktop application.

Alternatives

For a broader shortlist of chord lookup tools, browse Chord Finder Software.

ChordU is worth considering if you want a freemium option across Android, iOS, and web, with a paid Premium plan at $5 a month for uploads, MusicOnly mode, and downloads.

Chord Analyser is an Android alternative with a free plan and no free trial.

Chordio is an option for users on iOS or macOS who prefer a free download with built-in sounds, an on-screen keyboard, and real-time MIDI chord detection.

OtoTheory may suit iOS users who want a free starting tier with three local sketch saves, or a one-time Lifetime plan at 99.99 USD for its Pro features.

Autochords is an iOS option with a free tier, though some progressions require PRO.

Chord ai is available on Android and iOS, with basic features and unlimited free use in its free plan; its monthly Pro plan is $9 a month.

Harmony Pro is a free alternative for macOS, Windows, and web users.

Open—Shape is another iOS and web option, with a free plan that includes its chord engine, voicings, built-in tunings, and acoustic playback.

Verdict

Choose ChordSequence if you want a free place to build, hear, edit, and export chord progressions, especially on Android or in a desktop browser. The unlimited access and included WAV and MIDI exports are its clearest advantages. Look elsewhere if a dedicated iPhone app is essential or your work calls for a full production suite rather than an arrangement sketchpad.