Free browser-based audio converter with no uploads or signups required
Free per-app volume control for macOS with real VU meters, no audio driver required
Stage
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Pricing model
Freemium
Free
Pricing
Free: 5 conversions per month with 10-second preview output, 20MB file size limit. Pro Weekly: $5.99/week with unlimited conversions, full-length output, 500MB file size limit. Pro Monthly: $9/month with same Pro features. Pro Yearly: $5/month billed as $60/year (44% discount) with same Pro features
Free
Key features
Local browser-based processing with WebAssembly
Works offline once page loads
Support for MP3, WAV, FLAC, OGG, M4A, AAC, WMA, AIFF, Opus
Unlimited conversions with Pro subscription
500MB file size limit on Pro plans
Audio editing tools including cutter, joiner, compressor, and speed changer
Cross-device access with Pro subscription
Works on all modern browsers and operating systems
Per-app volume sliders and mute controls
Real VU meters per app and master
No audio driver installation required
Output device switcher for speakers, AirPods, and audio interfaces
Hide specific apps from the volume control list
Drag-to-reorder app arrangement with persistent settings
Automatic per-app level memory across sessions
In-app self-updating mechanism
What makes it different
Files stay on your device with no server uploads
No installation, plugin, or account signup required
Works offline after initial page load
Processes audio at full CPU speed locally in browser
Conversion starts immediately without upload delays
Free solution to a macOS gap that Windows provides natively
No system audio driver installation required
Real analog-style VU meters rather than decorative animations
AppVol