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SMI to SRT Converter

Turn SAMI (.smi) subtitles into standard SRT for modern players and video editors, one episode or a whole season at a time.

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Subtitle editingSubtitle EditorShift SubtitlesMerge SubtitlesFix Garbled Subtitles

or drop files here

Accepts SMI

Encrypted upload. Files are deleted automatically after 1 hour.

About SMI to SRT

SMI to SRT is for SAMI subtitles, the format that came with Windows Media Player and is still common for Korean dramas and films. Many modern players, TVs and editing apps don't read .smi, or show its HTML-like tags as text, while SRT is the format they handle reliably. Upload one .smi or a whole season of them and download numbered SRTs, one per episode and all of them in one ZIP.

Each SYNC point becomes a subtitle that lasts until the next one, and the blank lines SAMI inserts to clear the screen end the previous subtitle at the right moment. Line breaks, italics, bold, underline and font colours are kept as SRT tags. Korean files in EUC-KR are detected automatically. When a file contains two languages, the first one in the file is used. Under More options, Fix overlapping and too-short subtitles keeps every line up for at least 0.7 s and ends it before the next, and Bilingual subtitles: keep can drop the Korean or the English lines from subtitles that hold both.

How to use SMI to SRT

  1. 1
    Upload the SMI files

    Choose or drop .smi subtitle files. Up to 20 go in one task, 50 with VIP.

  2. 2
    Click SMI to SRT

    SYNC points are turned into timed SRT cues on our server, episode by episode.

  3. 3
    Download the SRT

    Name each file like its video so the player picks it up, or take the whole season as one ZIP.

Why use Cubfile for this

  • Timing that matches

    Each subtitle ends exactly when the next SYNC point or a blank clearing line begins.

  • Korean encodings handled

    EUC-KR and CP949 files are recognised, so Hangul doesn't turn into gibberish.

  • A whole season at once

    Every episode's SMI converts in one task, each to its own SRT, with a ZIP of the set.

  • Basic styling kept

    Italic, bold, underline and font colours carry over as SRT tags, saved as UTF-8, UTF-8 with BOM or UTF-16.

FAQ

SMI to SRT: questions and answers

Can I convert a whole season of SMI files at once?
Yes. Add every episode's .smi to one task and press SMI to SRT. Each file comes back as an SRT with the same name, and the whole season is also in one ZIP, ready to copy next to the videos.
What if the SMI to SRT result shows the wrong language?
A file with two languages, such as Korean and English classes, gives the first language in the file. To get the other one, delete the first language's lines from the .smi in a text editor and convert again. Once you have both languages as SRT, Merge Subtitles can show them together, one above the other.
How do I fix garbled Korean with SMI to SRT?
Just convert the file. SMI files are checked for Korean encodings such as EUC-KR first, and the SRT is saved as UTF-8, which every player reads. For Korean SRT or ASS files that show the same garbling, Fix Garbled Subtitles re-saves them as UTF-8.
Is SMI to SRT free?
Yes. Without an account you have 2 tasks and with a free account 2 a day, each converting up to 20 files, while VIP is unlimited and takes 50 files a task.
Are my subtitles private?
Yes. Files travel over HTTPS, are converted in an isolated process and are deleted automatically after an hour.
Share SMI to SRT with a friendIt runs in any browser, and they can try it without signing up.

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