.ust file: how to open it on Windows

2 Windows apps register the .ust extension. Install one of them to open the file with a double-click.

• 
  Utsu

  An UTAU frontend implemented in java.

  Proprietary 0.4.5 349 ↓ ★ 203
• 
  Utaformatix

  Utaformatix (https://sdercolin.github.io/utaformatix3/) is an open source online singing synthesis project converter. It supports vocaloid, utau, deepvocal, cevio and synth-v. This is an electron app which lets you use it offline.

  Open source 3.6 ★ 3

Related guide: Change the default app for a file type in Windows