Key & BPM Lab
keybpmlab.com
Free browser-based audio tools to detect key and BPM, change tempo and pitch, and edit audio with privacy-first local processing.
Description
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Installation
Not sure where to start — ask an assistant to walk you through:
Features
🎵 Key & BPM Finder
Accurately detect the musical key, BPM, scale, and Camelot code of any audio file. All analysis is performed locally in your browser, ensuring your audio never leaves your device. Simply upload a track and get instant re
🔄 Key & BPM Changer
Change the tempo of a track without altering its pitch, or transpose it to a different key while preserving the original tempo. This is ideal for practicing along with songs, adjusting mixes, or creating remixes. Export
🧰 All-in-One Audio Toolbox
Access a comprehensive suite of additional audio tools including audio cutter, joiner, voice recorder, BPM tapper, metronome, and AI-powered features like vocal remover, stem splitter, audio enhancer, and audio-to-MIDI c
Use cases
DJ checks BPMs before a set.
Musician transposes song for practice.
Podcaster cuts interview pauses quickly.
Teacher uses metronome for student practice.
Producer extracts stems from a track.
FAQ
Yes, the essential audio tools like Key & BPM Finder, Changer, Cutter, Joiner, Tapper, and Metronome are completely free with no account required. AI-powered tools like Vocal Remover and Stem Splitter use credits, available through subscription or one-time purchases.
No. Most tools process audio locally in your browser without uploading your files to any server. For tools that require cloud AI processing, we clearly state what data is sent and stored. We do not save your source audio or generated results on our servers.
Use the BPM Finder to automatically detect the tempo of an audio file. Use the BPM Tapper to manually tap along to the beat to determine tempo when you don't have a file, or want to check a live performance.
The tools support common formats like MP3, WAV, M4A, and more. For the best results, use uncompressed formats like WAV for precise analysis. The specific formats depend on the tool and your browser's capabilities.
Yes, the tools are designed to work on mobile browsers as well as desktops. However, for intensive tasks like stem splitting, a computer with good processing power is recommended for faster performance.
The free plan gives you access to the core audio analysis and editing tools without any cost. Paid plans (Plus and Pro) provide credits for AI-based features like Vocal Remover, Stem Splitter, Audio Enhancer, and Audio to MIDI, along with additional benefits like private creation history and priority processing.
Credits are used for AI-powered tools. Each AI operation consumes a certain number of credits based on the complexity and length of the audio. You can purchase credits through a subscription (monthly/yearly) or one-time credit packs. When you subscribe, credits refresh each month.
Yes, if you have an active paid subscription, you have commercial use rights for the outputs generated using the AI tools. Free users may not have these rights, so we recommend subscribing if you plan to use outputs commercially.
Yes, we offer a 30-day money-back guarantee. If you haven't used any paid credits, you can get a full refund. Otherwise, a proportional refund for unused paid credits is available, as per our refund terms.
For any issues or questions, you can email us at support@keybpmlab.com. Paid subscribers receive priority email support, ensuring quicker responses.
Specs
| Type | Tool |
| Section | Audio |
| Pricing | has a free tier (от $9.9/mo) |
| Platform | Web only |
| Systems | web |
| Hosting | cloud |
| Install | saas |
| Site language | en |