Song structure finder: map a track's sections
Drop a track and see its rough arrangement, intro, verse, chorus, outro, estimated from the audio. Free and fully in your browser.
Drop your track here
MP3, WAV, FLAC, AIFF, up to 50 MB. Analysed in your browser; nothing is uploaded.
Every song has a shape: an intro that sets it up, sections that build and release, and an outro that lets it go. Knowing that arrangement is useful for producers learning from a reference, DJs planning where to mix, or anyone briefing an AI generator on how a track should be structured. This tool sketches that shape for you, straight from the audio.
It runs entirely in your browser. The file is decoded and analysed on your own device, so nothing is uploaded, nothing is stored, and there's no account. It uses the same section estimation that feeds our reverse tool, pulled out on its own.
How structure detection works
The tool reads the track's loudness and energy envelope over time and groups it into contrasting segments, quieter intros and breakdowns versus louder choruses and drops. The result is an approximate count and ordering of sections, a guide to the arrangement rather than a bar-accurate, labelled map.
Why it's approximate
Section boundaries are estimated from energy, not from a true understanding of song form, so a dynamic verse and a quiet chorus can be read against expectation. Treat the output as a sketch of how the track rises and falls, and trust your ear where it disagrees.
From structure to a full prompt
If you want the rest of the picture, tempo, key, mood, instruments and a ready-to-paste prompt that includes the section layout, run the same track through the reverse tool, which builds the interpreted layer on top of this measurement.
Frequently asked questions
- Is my audio uploaded anywhere?
- No. The file is decoded and analysed entirely in your browser; it never reaches our servers and isn't stored.
- How accurate is the structure map?
- It's approximate, sections are estimated from the loudness envelope, so treat it as a guide to the arrangement rather than a precise, bar-aligned breakdown.
- What counts as a section?
- A stretch of the track with broadly consistent energy, an intro, verse, chorus, breakdown or outro. The tool reports how many it finds and their rough order, not formal labels.
- Do I need an account?
- No. Like our other free tools, it runs entirely on your device with no sign-up.