I built a free browser tool for audio mastering. No install, no sign-up, processes entirely locally
Mastering tracks before putting them on YouTube or Spotify is always kind of a pain.
Sure, there are free mastering options out there, but I wanted something that looks better, is easier to use, and gives me more control for my own workflow.
So I just made one myself, and it does the job nicely.
* **100% Local Processing.** Your files are never uploaded to any server. Everything runs in your browser. (If it's too slow, sorry, blame your CPU) * **Batch Processing.** Drag & drop up to 50 tracks. * **Multithreading.** It uses parallel web workers, so the processing speed depends on your CPU's multi-core power. * **A/B Testing.** Toggle between original and mastered tracks instantly without lag. * **6 Presets.** *Transparent* is enough for most cases. * No subscriptions, no sign-ups, no paywalls, nothing.
Export as WAV or MP3 (it preserves your metadata/cover art), or download everything at once as a ZIP file.
Originally built this just for myself, but figured I'd share it. Feel free to use it. Thanks.