Song Key Finder
Listen deeper. Find the tonal center.
Analyze a Song
Upload an audio file for the most stable estimate. YouTube links can use the site API or the local helper.
Checking API...
Checking YouTube access...
Waking the analyzer
The first request after an idle period can take a few seconds.
Open service statusYour upload is used only for analysis and is deleted from temporary storage when the job finishes.
Advanced: optional local YouTube helper
Want local YouTube link analysis?
The site API can analyze YouTube links. Install the helper only if you want a local fallback on this computer.
- On Mac, unzip the helper and run INSTALL_MAC_HELPER_PROTOCOL.command once.
- On Windows, unzip the helper and run the setup files once.
- Return here and use Start Helper only when you want to run the local fallback.
Ready when you are.