Free browser-based audio tools for finding and changing song key and BPM
A portable 4-track recorder for iPhone with hardware-inspired workflow
Stage
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Founded
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Pricing model
Freemium
Paid
Pricing
Free plan includes Key & BPM Finder and Changer, Audio Cutter and Joiner, BPM Tapper and Metronome, Voice Recorder, and local processing tools with files saved for 6 hours. Plus plan: $9.90/month with 1,000 credits per month and files saved for 7 days. Pro plan: $19.90/month with 2,500 credits per m
$14.99 / £14.99 / €17.99 one-time purchase
Key features
Detect song tempo, musical key, scale and Camelot code
Change key and BPM independently and export as WAV
Cut and join audio segments
Record voice and tap beat timing
Practice with online metronome
Remove vocals from songs
Split songs into instrument stems
Enhance audio quality with AI
Convert audio to editable MIDI
32-bit float audio recording up to 96kHz
4 tracks per recording, stereo or mono
Overdub and punch-in with latency compensation
Bar-synced looper with 1, 2, 4, 8 or 16 bar lengths
Jog wheel interface with haptic feedback
MIDI clock and transport sync
8-in / 10-out USB audio routing
Export as WAV, AIFF or M4A with stems
Reverse playback and reverse recording
Master Record and Resample
What makes it different
Process audio locally in browser without uploading to servers
No file storage or account required for free tools
All free tools with privacy-first design
Direct export from browser without server processing
Hardware-inspired jog wheel interface with haptic feedback for tactile control
32-bit float audio recording with no clipping worries
One-time purchase with no subscription or ads
Auto-routing with any class-compliant USB audio interface
Key & BPM Lab
Reel