Convert SUB to SMI in bulk.
Large SUB files are supported.

You can convert SUB Learn more about SUB files to

Document/Office
Subtitles


How to convert SUB to SMI?

You can convert SUB to SMI with MConverter in three easy steps:
  1. Choose SUB files from your device
    At the top of this page, drag and drop your SUBs.
    You can also click to select SUB files using your operating system's file picker.
    Another method is to press the keyboard shortcut Ctrl+V (⌘+V on Mac) to paste a SUB file you have copied to clipboard.
    Converting a folder with SUB files to SMI is also supported: simply paste or drag and drop it.
  2. Click or tap on SMI from the list of target formats
    Alternatively, you can use the search field to quickly find the format you need, whether it's SMI or something else.
  3. Download your SMI files, after MConverter has finished processing them
    There's an option to automatically download the converted SMI files, so you don't have to press the download icon for each SMI.
    On desktop platforms, you can download the SMI files to a different folder by clicking on SAVE TO...
    You may see a share icon as well. Use it to directly share the SMIs with other apps.

About the formats

Extension sub
Category Subtitles file formats
Developed by Tiamat Software
Mime type -

Description

MicroDVD Subtitle files (SUB) contain subtitle text, start and end time points. SUB files are meant to be used together with the corresponding video the subtitles are for. MicroDVD Subtitle do not support text formatting.
Note: SUB files do not contain a video stream inside.
Extension smi
Alternative extension sami
Category Subtitles file formats
Developed by Microsoft
Mime type -

Description

SAMI is short for Synchronized Accessible Media Interchange. Developed in the late 90s by Microsoft, SMI or SAMI files were an accessibility initiative by the company. Such files contain subtitles with formatting, extended from HTML. In other words, subtitle text in the SAMI format can be bolded, italicized, underlined, colored, and more. SAMI files are used along with video files as closed captions.

Common questions about converting SUB to SMI

Can I convert SUB to SMI in bulk?

Yes, MConverter supports batch converting of multiple SUBs to SMIs simultaneously. You can even drag and drop folders containing SUBs to convert to SMI.
Pasting SUB files and folders copied in the clipboard also works: use Ctrl+V.

Can I convert a SUB file to SMI, if its size is 1 GB?

Yes, with MConverter Premium you can convert big SUBs, up to 1 gigabyte each.
The free version lets you convert files up to 100 MB. If you need to convert SUB files over 100 megabytes, try MConverter Premium.

Is converting SUBs to SMI safe with MConverter?

Yes, we encrypt your connection using industry standards. Plus, your SUB files are only accessible by you. 4 hours after the conversion completes, they are automatically deleted from MConverter’s servers. You can also delete your SUBs and other converted files immediately after finishing the conversion by clicking the bin icon.
Join others who have trusted us to convert over 3,282,414 files so far.

How long does it take to convert SUB to SMI?

For most files with subtitles, the wait is just one or two seconds. However, MConverter also supports converting larger files with subtitles, meaning that it could take a while (up to over an hour, for example).

SUB to SMI Converter Rating

4.3
15 votes

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