Free Song Key & BPM Finder
Detect the key and BPM of any song instantly. Just upload your audio and our tool analyzes its musical key and tempo with high accuracy — perfect for DJ mixing, mashups, and music production.
Audio Analyzer
Key & BPM Detection
Drop your song here
Supported: MPEG, MP3, WAV, M4A, AAC
How It Works
Upload Audio
Upload your audio file – MP3, WAV, M4A, FLAC, or any common format.
AI Analysis
Wait 1–2 seconds while our AI analyzes the musical key and BPM.
Get Results
Get instant results including Key, BPM, Energy Level, and Harmonic Insights.
No account required. No limits on basic usage.
Key Features
Accurate Song Key Detection
Determine the exact musical key (major/minor) of any track using AI-powered harmonic analysis.
Fast BPM Finder
Instantly detect the song’s tempo, even for tracks with tempo changes or complex rhythms.
Harmonic Mixing Insights
Great for DJs — find compatible tracks using Camelot Wheel + harmonic mixing recommendations.
100% Free Online Tool
No signup, no watermark, no app installation. Just upload and get your song data.
Ideal for DJs & Producers
Use it for mashups, live sets, transitions, remixes, vocal pitching, and more.
Part of our All-in-One Music Tools
Works seamlessly with Mashup Maker, Audio Enhancer, Vocal Remover, and more.
Who Is This Tool For?
For DJs
- Find the key & BPM for harmonic mixing
- Build smoother transitions
- Check tracks before a live set
For Music Producers
- Confirm song key for remixes
- Match vocals and instrumentals
- Build mashups with perfect pitch alignment
For Creators
- Prepare audio for TikTok, YouTube, or Reels
- Understand basic music properties without expensive DAWs
Why Detecting Song Key & BPM Is Important
Accurate musical key and BPM detection helps you:
For both beginners and professionals, this key finder music tool saves time and improves the quality of your final mix.
Frequently Asked Questions
Is this Song Key & BPM Finder free to use?
Yes. The basic version is 100% free with no signup required.
How accurate is the key detection?
Our AI model analyzes harmonic frequencies and is highly accurate for most genres, including pop, EDM, hip-hop, and acoustic music.
What file formats are supported?
You can upload MP3, WAV, M4A, FLAC, AAC, OGG, and more.
Can DJs use this for harmonic mixing?
Absolutely. We provide Key, BPM, and harmonic compatibility info for perfect mixing.
Does this tool work in the browser?
Yes. Everything runs online — no software installation needed.