Online Song Key Finder – Detect Musical Key Instantly

The AudioMetrics Key Finder accurately detects the musical key and scale of any song or instrumental. This tool is essential for vocalists, producers, DJs, and anyone who needs the correct key for autotune, harmonies, or remixes.

Features

• ✔ Fast key detection using harmonic frequency analysis
• ✔ Supports MP3, WAV, M4A, AAC & more
• ✔ Ideal for autotune, vocal mixing & pitching
• ✔ Works entirely offline in your browser
• ✔ 100% free

Why Artists Use This Tool

• • Singers to choose the correct autotune key
• • Producers creating chord progressions
• • DJs building harmonic mixes
• • Remixers and mashup creators

How It Works

Our algorithm analyzes dominant notes, harmonic peaks, and chord likelihood to determine the most probable musical key.

FAQ

Does it detect major or minor keys?

Yes — including sharps (#) and flats (b).