Free browser-based audio converter with no uploads or signups required
Free 3D room acoustics solver and acoustic treatment calculator
Stage
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Founded
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Based in
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HU
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
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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
3D room builder supporting odd-shaped rooms, sloped ceilings, and attic layouts
Real physics-based acoustic treatment recommendation
Material absorption modeling with coefficients from frontier research
Real product database with 175 products across 37 brands
Before-and-after frequency response and decay time visualization
Studio mode for production work alongside listening room workflow
Rapid analysis completing in 2-10 seconds for position searches and up to a minute for panel placement
Guest access without account signup for full analysis
Room design persistence with optional account creation
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
Uses real room physics and first principles acoustics rather than generic rules
Optimizes for both speaker placement and listening position simultaneously
No account or sign-up required to design and analyze full systems
Handles complex room geometries including sloped ceilings and L-shaped layouts
Integrates real speaker and equipment products with audio system design
roomtreatment.diy