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SBV to SMI converter, without the upload.

Turn SBV captions into SMI. It is converted in your browser, so the file never leaves your device.

Drop SBV files here

or choose from your computer paste with Ctrl V

Ready · other file types work too0 bytes uploaded, ever

Convert to

How to convert SBV to SMI

  1. Add your SBV captions

    Drop SBV files onto the box above, or click it to choose them. ToAny reads the file's contents to detect the type, so a wrong extension does not matter.

  2. SMI is already chosen

    Press Convert. There is nothing else to set. The work happens in this tab.

  3. Download

    Save the SMI, or download everything as one ZIP if you converted several files.

Why ToAny

  • Private by construction

    The SBV to SMI converter is part of this page and runs inside your browser. Your captions are never sent to ToAny or to anyone else.

  • No upload, no queue

    Nothing has to travel to a server and back, so the conversion starts the moment you press Convert, even on a slow connection.

  • Free, without an account

    No sign-up, no email address and no watermark. Add several files and download them together as a ZIP.

SBV to SMI: what to expect

SBV is understood mainly by YouTube and a few caption tools. SMI can carry several languages in one file for the players that read it. SBV is at home in uploading and downloading YouTube captions; SMI is the usual choice for subtitles for Korean-market players and multilingual files.

The text is read as UTF-8 or UTF-16, whichever the file is. An older file in another code page is read using the charset it declares, or as Windows-1252 if it declares none, so accented letters in an unlabelled legacy file can come out wrong. A file that is not text, such as the picture-based subtitles of a DVD, is refused instead of being converted to nonsense. Of the styling, only italic, bold, underline and the position on screen (top, middle or bottom, left, centre or right) travel between formats; fonts, colours, outlines and effects do not. The file is written with one language class, and cues that overlap in time are shown together, as SAMI has a single timeline.

SBV vs SMI

SBV

YouTube SBV subtitles

SBV is the plain caption format YouTube exports and accepts: a time range such as 0:00:01.000,0:00:04.000 followed by the text. It carries no styling and few other programs read it.

Opens in YouTube Studio and some caption tools; few media players

SBV converter
SMI

SAMI subtitles

SAMI is an HTML-like subtitle format from Microsoft, with each cue a SYNC tag holding the start time in milliseconds. It can hold several languages in one file, selected by style class. It is most common in South Korea.

Opens in Windows Media Player, KMPlayer, PotPlayer, VLC and Korean-market players

SMI converter
SBV compared with SMI
SBVYouTube SBV subtitlesSMISAMI subtitles
Stands forYouTube caption fileSynchronized Accessible Media Interchange
TypeSubtitlesSubtitles
CompressionNoneNone
IntroducedThe late 2000s, by Google (YouTube)The late 1990s, by Microsoft
Opens inYouTube Studio and some caption tools; few media playersWindows Media Player, KMPlayer, PotPlayer, VLC and Korean-market players
Best forUploading and downloading YouTube captionsSubtitles for Korean-market players and multilingual files
File extension.sbv.smi, .sami

Questions

Are my captions uploaded anywhere?

No. The SBV to SMI conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.

Is anything lost when converting SBV to SMI?

No further quality is lost: SMI stores the decoded audio exactly. The result is identical in content.

Can I convert several SBV files at once?

Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.

How do I convert SBV to SMI on Windows, Mac, iPhone or Android?

The steps are the same everywhere because ToAny runs in the web browser: open this page in a current version of Chrome, Edge, Safari or Firefox, add the SBV file, press Convert and save the SMI. There is nothing to install.

Is there a file size limit?

Yes, but a subtitle file is small. Files up to 50 MB are accepted, far more than any real subtitle file. Beyond that the limit is your device's memory, since nothing is uploaded; a computer copes with large files better than a phone.