Free browser-based audio converter with no uploads or signups required
Audio gear reviews built from independent sources, with consensus on what reviewers agree about.
Stage
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Founded
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Based in
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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
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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
Aggregates independent reviews from multiple sources
Shows where reviewers agree and disagree on products
Names reviewer camps instead of averaging opinions
Includes 566 products across headphones, IEMs, speakers, amps and DACs
Audio dictionary with 44 listening guides and 265 definitions
Side-by-side product comparison tool
Longer essays (Overtones) drawn from reviews and dictionary
Machine synthesis of human reviews with published weights
All claims link back to original sources
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
Shows genuine disagreement between reviewers rather than averaging opinions into bland consensus
Built from 19,395 independent sources with transparent weighting of affiliated or copied reviews
Explains why reviewers disagree, such as fit and ear shape differences
Updated live as new reviews are added to the catalogue
No manufacturer payment or review approval process
Audiowords