Privacy

Your audio and results

Audio is decoded, played and analyzed in your browser. This tool does not upload your audio or its filename. Clearing a result, replacing a file or closing the page releases that audio from the page. Your original file is not changed.

Listening, tapping a tempo, changing a half-time or double-time candidate, and copying a result do not send a correction automatically.

Correction history on this device

When you change an audio result, this browser saves a local history entry. It contains the filename, an audio identifier, file size and duration, the original and corrected values, the analysis version, the time, and any note you add. The identifier is a SHA-256 fingerprint of the file; it cannot reconstruct the audio.

History is specific to this browser. It remains until you delete an entry or clear this site's browser data. Clearing the current result does not clear your history.

Use Correction history to export JSON or CSV before clearing browser data. JSON includes your local filenames; CSV leaves filenames out. Both can contain your notes, so check an export before sharing it.

When you submit a correction

Save correction saves your edit locally and sends it to the feedback service. For changes made with half-time, double-time, tap or restore controls, choose Submit feedback in the history to share that entry.

A submission includes its record ID, audio fingerprint, file size and duration, detected and corrected values, analysis version, time, change source, and your optional note. It never includes the audio or filename. Please do not put personal information, private links or credentials in a note.

A received correction is stored as pending. It is not a verified answer, and receiving it does not change the analyzer. If submission fails, your local copy remains available for retry.

Submitted corrections are stored separately from your browser and do not expire automatically. Delete local copy removes only the copy on this device; it does not withdraw an already submitted correction.

Website requests and usage counts

Loading this website sends normal requests to its host, which can receive connection details such as your IP address, the requested page and your browser's request headers. These requests do not contain your audio.

The feedback service uses your connection's IP address for short-lived request limits. It does not save your IP address with your correction.

The live site loads Google Analytics (GA4) to count page views and basic usage. Google may receive your IP address, the page you opened, and your browser request headers. GA4 uses first-party cookies to distinguish visits and measure usage when your browser permits them. You can block or clear cookies in your browser settings. Usage events indicate when a real-file analysis starts, the tool, whether an analysis returned any candidate, and the first successful clipboard copy for each analysis or tapping sequence. These events do not include audio, filenames, file hashes, BPM or key values, correction notes, or a task identifier. Other diagnostic event counts stay in page memory and reset on reload. The site does not load advertising scripts or set extra tracking cookies of its own.

Affiliate link

One guide, Find the BPM of a song, contains the site's only affiliate link. Its text is “visit Splice”, it is marked sponsored, and its address is on splice.sjv.io. That guide says Find Key & BPM may earn a commission from eligible purchases made through the link. The address does not include your audio, a filename, an analysis result, or correction history.

Contacting us

For a privacy question or a request about a submitted correction, email [email protected]. Your email program sends the message. This website has no form that stores it.

Your choices

You can analyze and copy results without submitting feedback or creating an account. Review a note before sending it, export the local records you want to keep, and use the history controls to remove local copies. This notice will be updated if the site's collection or sharing behavior changes.