Free BPM & Key Finder Online
Analyze your audio locally and detect BPM, musical key and Camelot notation based on the entire track. No upload required. Works offline after first load.
Results
Log
RM Analyzer booting…
About this BPM & Key Finder
RM Analyzer is a free BPM and key finder that helps DJs, producers, editors and music creators analyze songs directly in the browser. It estimates the tempo of your track in BPM, identifies the musical key and also shows the Camelot notation for harmonic mixing.
Unlike many online analyzers, RM Analyzer is designed for local analysis. Your file is processed in your browser, which means no upload is required. This can be useful when you want a faster workflow, more privacy and an offline-first experience after the first load.
How it works
Select an audio file, choose your preferred balance between speed and detail for key detection, then start the analysis. The tool scans the whole track to produce a global estimate rather than relying on a tiny fragment. Results may still vary on songs with tempo changes, unusual rhythm structures, modulation or dense harmonic content.
Who is it for
This tool is useful for DJs checking track tempo before a mix, producers organizing libraries, creators preparing mashups, and anyone who needs a quick online BPM detector and song key finder without installing heavy desktop software.
FAQ
What is BPM in music?
BPM means beats per minute. It tells you the tempo of a song and is especially important for DJs, remixing, beatmatching and playlist organization.
What is musical key?
The musical key describes the tonal center of a song. Knowing the key helps with harmonic mixing, mashups and combining tracks that work well together.
How accurate is this song BPM detector?
RM Analyzer gives an estimate based on the full track. In many cases it is useful and consistent, but some songs may be interpreted at half-time or double-time, and complex harmonic material can sometimes produce a nearby key instead of the exact one.
Does RM Analyzer upload my audio?
No. The analysis is designed to happen locally in your browser, so your audio file does not need to be sent to a remote server.
Can I use RM Analyzer offline?
Yes. After the first load, the app is designed to work offline as an installable web app on supported devices and browsers.