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SCC to SMI converter, without the upload.

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

Drop SCC files here

or choose from your computer paste with Ctrl V

Ready · several at once0 bytes uploaded, ever

Convert to

How to convert SCC to SMI

  1. Add your SCC captions

    Drop SCC (CEA-608, EIA-608, line 21) 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 SCC 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.

SCC to SMI: what to expect

SCC is a hex dump that people cannot read or edit by hand, and web players do not read it. SMI can carry several languages in one file for the players that read it. SCC is at home in closed captions for US and Canadian broadcast, DVD and some streaming deliveries; 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. CEA-608 pop-on, roll-up and paint-on captions on the first caption channel (or the second, if the first is empty) are read; colours are dropped, and a roll-up row becomes one cue that ends when it scrolls off. Times follow the 29.97 fps frame clock, drop-frame or not. The file is written with one language class, and cues that overlap in time are shown together, as SAMI has a single timeline.

SCC vs SMI

SCC

SCC closed captions

SCC stores the CEA-608 caption data of line 21 video as lines of hexadecimal byte pairs, each line starting at a timecode, one pair per video frame. It is limited to 32 characters on up to four rows, a Latin character set and a frame-based clock (usually 29.97 fps drop-frame), but it is what American broadcasters and many video editors expect.

Opens in Broadcast and DVD authoring tools, Premiere Pro, Final Cut Pro, DaVinci Resolve and VLC

SCC 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
SCC compared with SMI
SCCSCC closed captionsSMISAMI subtitles
Stands forScenarist Closed CaptionsSynchronized Accessible Media Interchange
TypeSubtitlesSubtitles
CompressionNone (hex text)None
IntroducedThe 1990s, by Sonic Solutions (Scenarist)The late 1990s, by Microsoft
Opens inBroadcast and DVD authoring tools, Premiere Pro, Final Cut Pro, DaVinci Resolve and VLCWindows Media Player, KMPlayer, PotPlayer, VLC and Korean-market players
Best forClosed captions for US and Canadian broadcast, DVD and some streaming deliveriesSubtitles for Korean-market players and multilingual files
File extension.scc.smi, .sami

Questions

Are my captions uploaded anywhere?

No. The SCC 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 SCC to SMI?

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

Can I convert several SCC 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 SCC 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 SCC 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.