Free BPM & Key Finder
Exact tempo and musical key of any song, measured from the audio — not guessed from tags. Works on unreleased tracks, Suno/Udio exports and raw bounces. Free, about 60 seconds, no card.
Typical BPM ranges by genre
Why tempo matters beyond the DJ booth
Key and BPM decide which remixes, mashups and collabs are compatible — but on short-form they decide something else: the cut rhythm. Beat-synced edits only land when the edit grid matches the real tempo, and a track that sits far outside its genre’s typical range (see the table above) reads as either a deliberate statement or a mistake. Where your tempo sits inside that range — and whether your clip cuts on the beat — is covered in our best BPM for TikTok guide. The reels Songbrain renders from your analysis are cut on your song’s measured beat grid automatically.
What you get
Exact BPM
Beat-tracked over the full song, so a tempo change or rubato intro doesn't fool the number. Reported to the beat, not rounded to the nearest 5.
Musical key with mode
Tonic and major/minor, estimated from the full track's pitch content — what you need for remixes, mashups and choosing a collab topline.
Loudness & energy
Integrated LUFS vs Spotify/YouTube/Apple targets and the energy profile across the track come with the same analysis.
Your strongest seconds
The analysis also ranks your song's best moments with timestamps — the seconds to clip for short-form video.
How it works
MP3 or WAV, full track (30 seconds minimum). No account data or metadata needed to start.
Beat tracking for tempo, pitch-content analysis for key, loudness measurement for LUFS — all computed from the waveform.
BPM and key sit at the top of your result, next to the loudness check, your best moments and the Virality Score.
Common questions
From the audio itself — beat tracking over the full waveform, not a metadata lookup. That's why it works on unreleased tracks, AI-generated songs and bounces that have no tags at all.
Both, in a sense. Genres like trap and hip-hop are produced at a high BPM but felt in half-time — a 140 BPM trap beat grooves like 70. Beat detection reports the pulse it measures; if the number is exactly double or half what you expect, that's the half-time relationship, not an error.
Yes — you get the tonic plus mode, e.g. A minor or F# major, estimated from the track's pitch content across its full length.
Remixes, DJ sets and collabs need matching keys and compatible tempos. Beat-synced video editing needs the exact BPM. And knowing your tempo tells you whether you sit inside or outside your genre's typical range — see the table on this page.
The same free analysis includes loudness (LUFS vs platform targets), your song's strongest moments with timestamps, a 0–100 Virality Score, genre classification and 7 ready-to-post reels.
Related guides & tools
Know your numbers
BPM, key, loudness and your strongest seconds — one free analysis, about 60 seconds, no card.
Detect BPM & Key →