Free browser-based audio tools for finding and changing song key and BPM
Shape custom notification sounds with AI
Stage
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Founded
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Based in
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Pricing model
Freemium
Free
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
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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
Synthesize sounds from oscillators and noise layers
Stack multiple layers with individual pitch and envelope controls
Adjust wave shape: sine, triangle, saw, square or noise
Real-time visualization of sound waves
Apply effects: reverb, chamber, echo, chorus, phone filter and crunch
Share sounds via URL link carrying full sound data
Download sounds as MP3 files
Connect with Claude, ChatGPT, Cursor and VS Code via MCP server
Save sounds to personal browser library
No account or installation required
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
AI assistant integration through MCP server for natural language sound design
Synthesized from scratch with no samples or recordings
Real-time editing with live audio preview while adjusting
Works as notification sounds, ringtones, and in apps without conversion
Key & BPM Lab
Notify Sound