Convert SMI
to SRT
Drop in a .smi (SAMI (Synchronized Accessible Media Interchange)) file, get a clean .srt (SubRip Subtitle) back. SubRip Subtitle is the most universal subtitle format — read by every video editor, media player, and platform. The conversion runs entirely in your browser — your captions never leave the page.
Frequently asked
Why convert SMI to SRT?+
SAMI (Synchronized Accessible Media Interchange) is Microsoft's HTML-like caption format from Windows Media Player era. Still required by some Korean and Japanese broadcast pipelines. SubRip Subtitle is built for delivery to almost any video editor or upload form. Converting lets you take a file produced for one workflow and use it in the other without re-typing or re-timing anything.
Is timing preserved exactly?+
Yes. The converter only re-encodes the file structure — start and end times round-trip to within one millisecond.
Does any styling survive the conversion?+
Neither format carries styling, so there's nothing to lose. The text and timing transfer exactly.
Does this run on a server?+
No. The conversion is pure JavaScript running in your browser — files never upload anywhere. Works offline once the page is loaded.