Question 1

Is this song key finder free?

Accepted Answer

Yes, everything here is free: key and Camelot detection, the confidence score, the second-best guess, the key-over-time timeline, the tuning-offset reading, batch analysis, CSV export, and key tag export. Tunebat's own Analyzer keeps Save Results, Download Results, and Analysis Configuration behind a €6.99/mo Pro plan and runs ads on its free tier. Nothing here is held back for a paid tier.

Question 2

How do I find the key of a song with this tool?

Accepted Answer

Drop an audio file into the upload area above, or click it to browse for one. Whether you think of this as a music key finder, an audio key finder, or a song key detector, the job is the same: it listens to the whole track in your browser and shows its musical key and Camelot code within a few seconds, with no account and no configuration screen first.

Question 3

Is my audio file uploaded anywhere, or does it stay on my device?

Accepted Answer

It stays on your device. Decoding and key analysis both run through the Web Audio API directly in your browser, and this tool doesn't have a server to send a file to in the first place. "Upload" in the interface just means picking a local file for that in-browser analysis, never a network transfer.

Question 4

What key is this song, and how accurate is the result?

Accepted Answer

Upload the track and this tool answers that directly: a key and mode (like "E minor"), its Camelot code, and a confidence score built from how strongly the track's actual pitch content matches that key, not a flat, unverifiable accuracy percentage. A clean, single-key track typically lands the confidence badge in the 70-100% range; a drum-heavy or atonal clip reads low on purpose, because there genuinely isn't a strong key to detect there. That's a more honest signal than a marketing number with no test set behind it.

Question 5

Why does this tool show a second possible key?

Accepted Answer

Because key detection has two real, well-known ambiguity types, and pretending they don't exist would be dishonest. A relative major and minor (like C major and A minor) share every note in their scale, so a chromagram can genuinely read either one; a parallel major and minor (like C major and C minor) share a tonal center but differ in the third, which a busy mix can blur. This tool names which of the two it's showing next to your second-best guess, instead of just labeling it "alternate."

Question 6

Can this key finder show where a song changes key?

Accepted Answer

Yes. Underneath your result, a colored timeline strip breaks the track into segments wherever its key actually holds steady, so an intro in a different key or a modulation into the final chorus shows up as its own block. Ordinary wobble between a track's relative or parallel key during a dense mix is smoothed out on purpose, so it doesn't get mislabeled as a real modulation.

Question 7

What's a Camelot code, and how do I use it for harmonic mixing?

Accepted Answer

It's the two-character notation DJ software like Rekordbox, Serato, and Traktor uses for harmonic mixing, e.g. "9A" for E minor. Two tracks mix cleanly when their codes share a number with a different letter (the relative-key swap) or sit one number apart on the same letter (a perfect-fifth neighbor). Your result includes an interactive Camelot wheel highlighting those three compatible keys, plus a plain-language list next to it if you don't already have the numbers memorized.

Question 8

Can I find a song's key and its BPM at the same time?

Accepted Answer

Not on this page: key is a tonal property, worked out from pitch and harmony, while BPM is a rhythmic one worked out from timing, so measuring one doesn't tell you the other. Whether you're looking for a key and bpm finder in one place or asking two separate questions, the two live on separate pages here: for a track's tempo, use this site's BPM Finder, which runs the same kind of full-track, in-browser analysis.

Question 9

Can I analyze more than one song at once?

Accepted Answer

Yes. Drop multiple files into the upload area and each one is analyzed on its own; results appear in a table with per-file key, Camelot code, confidence, and second-best guess, and the whole batch exports as a CSV. Neural Frames offers a lighter version of this; Tunebat's own batch analysis and export sit behind its paid plan. Neither limit applies here.

Question 10

Can this tool add the detected key to my file's tag?

Accepted Answer

Yes, for MP3 and FLAC files. Once a file is analyzed, download it with the detected key written into its tag (the ID3 TKEY frame for MP3, a Vorbis comment for FLAC) in standard notation like "Am" or "F#", ready to re-import into tag-reading DJ software like Serato, Rekordbox, or Traktor without retyping it. None of the 6 competitors checked while building this tool offer that.

Question 11

What audio formats does this tool support?

Accepted Answer

MP3, WAV, FLAC, OGG, M4A/AAC, and AIFF, with no file-size cap beyond a soft warning on very large files for your own browser's memory, beating MusicWave.ai's 50MB cap.

Question 12

Does this tool tell me if my track isn't tuned to standard pitch?

Accepted Answer

Yes. Every result includes a tuning-offset reading in cents from standard A=440 tuning, so a track recorded or mastered near A=432 ("Verdi tuning") shows that instead of being forced into the nearest standard-tuning key label. A reading close to zero also doubles as a sanity check that the analysis locked onto real pitch content instead of noise.

Question 13

Does this work on mobile?

Accepted Answer

Yes. Upload, batch analysis, the manual override, and key tag export all work on any modern mobile browser.

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