Convert SMI or SAMI subtitles to ASS. Preserve cue timing and text in a basic Advanced SubStation Alpha subtitle file.
1. Select your SMI file
2. Select the source format
3. Select the output format
Select a local SMI file. The same tool can also parse other supported subtitle formats when you change the source format.
The page defaults to ASS, but you can switch the output selector to another supported format before converting.
Preview the converted result, copy it, or download the file for editors, players, publishing platforms, or transcript workflows.
Use the full browser-based converter here: adjust the source or output format when needed, then preview and download the result.
Timed subtitle formats keep their cue timing. Plain TXT creates simple sequential timing from the start, duration, and gap options.
Advanced styling from ASS, SSA, TTML, or SMI is simplified when the selected output format does not support that styling.
Common questions about converting SMI files to ASS.