osu!mania ↔ Etterna / StepMania beatmap converter.
The reliable VSRG converter you asked for.
There are a handful of converters out there, but most of them mess up the timing - notes drift, BPM changes get flattened, and holds break. Henkan does it properly: millisecond-accurate timing, full note conversion, BPM changes preserved, holds intact. What comes out is exactly what went in.
Drag a .osu, .osz, or .sm file onto the window and it just works. Cross-platform, native performance, no web wrapper.
- osu!mania (.osu / .osz) ↔ Etterna (.sm) - timing, holds, BPM changes, metadata
- Metadata mapping - title, artist, creator, difficulty, preview point
- BPM changes - multiple tempo changes supported
- Hold/Long notes - start/end translation
- Background references - preserved across formats
Note: SV (scroll velocity) is not converted in the osu → .sm direction — the .sm format has no equivalent of osu's green lines.
- Available for Windows (.msi), macOS (Silicon) (.dmg), and Linux (.AppImage / .deb).
- Download here