Free Tool
A/B Audio
Comparator
Load two audio files and switch between them at the same playhead position — instantly, with no delay. Perfect for comparing mix versions, masters, or samples.
Files never leave your device — 100% in-browser
Space play / pause A / ← switch to A B / → switch to B Click waveform seek
Why A/B Testing Matters
Level the Playing Field
Louder often sounds "better" — but that's a psychoacoustic trick, not a real improvement. Use Loudness Match to equalize levels and hear the actual difference between two mixes.
Zero-Delay Switching
Both files are pre-decoded into memory and share the same playback position. Switching between A and B is instant — no reload, no gap, no drift. Your ears stay calibrated.
Inline Analysis
Each file is automatically analyzed for key, BPM, and LUFS after loading. See at a glance how two versions differ in loudness, tempo, and tonality without leaving the page.
100% Private
Your audio files are decoded locally in the browser. Nothing is uploaded anywhere. Close the tab and all data is gone.
Want to share audio with clients?
Tracklyst streams audio directly from your Dropbox or OneDrive — with waveform comments, version stacking, and listener portals.