Upload MIDI, MusicXML, or audio to analyze chord structure, detect key, and generate visualizations. Free online music theory tool.
Chord Analyzer is a free online music tool that runs entirely in your browser — your files never leave your device and are never uploaded to any server.
No installation, no signup; works on both phone and desktop, ready to use instantly.
We noticed most online tools upload your files to remote servers. Since privacy is our core principle, we built this tool to process everything locally in your browser.
Yes, completely free with no signup required.
Yes, it works on mobile browsers with touch support.
Music
Yes. Chord Analyzer runs entirely in your browser: files you select are never uploaded to any server — all processing happens in your device's memory and is wiped when you close the page.
Privacy & Security: All processing happens locally in your browser. Files are never uploaded or stored.
Privacy: All processing happens locally in your browser. Your files and data never leave your device — no upload, no server, no tracking.