Free browser-based audio tools for finding and changing song key and BPM
Mac screen recorder that turns rough captures into polished product demos and stages them in device mockups
Stage
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Founded
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Based in
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Pricing model
Freemium
Freemium
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
3D cinematic camera with 30+ templates and keyframe support
AI smart auto-zoom on clicks, typing and mouse dwell
AI background removal with blur, color, or custom image
AI captions and subtitles with 98%+ accuracy
3D iPhone and MacBook device mockups with multi-device staging
Native Metal GPU acceleration for 3× faster export
Multi-track timeline with cuts, trims and per-clip properties
Screenify CLI with AI web demo automation
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
100% local processing with zero cloud upload or internet required
Lifetime license option with no subscription anxiety
Native Apple Silicon optimization with Metal GPU, not Electron wrapper
3× faster export speed than competitors on M3 Pro
Cinematic depth and professional camera moves without editing expertise
Key & BPM Lab
Screenify Studio