Key & BPM Lab

Key & BPM Lab is a set of free, browser-based audio tools for musicians, DJs, and creators who want to analyze tracks and make targeted tempo/key changes. You can detect a song’s musical key and tempo, get useful codes like Camelot, tap along with a BPM tapper, and practice with an online metronome. Each tool is built around a focused workflow so you can go from “measure” to “use the result” quickly.

For editing, you can change tempo without changing pitch, transpose tracks, and export transformed audio as WAV. You can also cut and join audio clips, record your voice, and use dedicated workspaces for common tasks. Many core analysis and editing operations run locally in your browser, keeping your workflow simple and responsive.

Privacy is a core design choice: your source audio and generated results remain in browser memory rather than being saved to an account or stored to a cloud bucket. The tools also explain when a feature requires cloud or AI processing, including what happens beyond local processing.

Pricing is credit-based. Free tools are $0 forever, and paid plans include Plus ($9.90/mo) and Pro ($19.90/mo) with monthly credit packs and different file retention windows. One-time credits are also available, and credits refresh on a monthly cycle.

Is Key & BPM Lab free to use?

Yes. Many tools are free to use in your browser, including the Key & BPM Finder and Changer, Audio Cutter and Joiner, BPM Tapper and the Metronome.

Do I need an account to analyze my audio with the free tools?

No account is required for free tools. You can start from a local audio file and work through the dedicated tool interface.

Will Key & BPM Lab upload my songs somewhere?

Core analysis and editing tools run locally in your browser, and your source audio isn’t saved to an account or cloud bucket. If a feature needs cloud or AI processing, its tool page explains what’s sent, stored, and retained.

What can I do after I find a track’s key and BPM?

You can practice at the detected tempo, use the BPM tapper to align your timing, and change pitch and/or tempo independently. You can also export your transformed audio for download.

Which paid features typically require credits?

Credit-based subscriptions cover AI processing options such as Vocal Remover, Stem Splitter, Audio Enhancer, and Audio to MIDI.

How do Plus and Pro pricing work?

Plus is $9.90/month for 1,000 credits/month, while Pro is $19.90/month for 2,500 credits/month. Credits refresh monthly, and file retention differs by plan (7 days for Plus, 30 days for Pro).