Free tool · SMITXT

Convert SMI
to TXT

Drop in a .smi (SAMI (Synchronized Accessible Media Interchange)) file, get a clean .txt (Plain text transcript) back. Plain text transcript is a clean transcript with no timestamps — one line per cue, ready to paste anywhere. The conversion runs entirely in your browser — your captions never leave the page.

Input · SMI
Output · TXT
Everything runs in your browser — no upload, no signup.
Need to generate the captions in the first place?
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Frequently asked

Why convert SMI to TXT?+

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. Plain text transcript is built for show notes, blog posts, search indexing, LLM input. 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. Plain text output drops timestamps entirely; the underlying cue order is preserved.

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.

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