SAMI to SUB Converter • Online & Free • MConverter

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

Drop Tap to Choose SAMI Files Here

Or Browse

Paste files with Ctrl+V

To select multiple, hold and drag on the file icons

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How to convert SAMI to SUB?

You can convert SAMI to SUB with MConverter in three easy steps:

Choose SAMI files from your device or cloud storage
At the top of this page, drag and drop your SAMIs.

Alternatively, click on the Browse box to select files with your device's file picker, or copy and paste a SAMI file by pressing Ctrl+V (or ⌘+V on Mac).

MConverter can easily import SAMIs from Google Drive, OneDrive, and Dropbox.

Converting a folder with SAMI files to SUB is also supported: simply paste, drag and drop it, or use the ADD FOLDER button.
Click or tap on SUB from the list of target formats
You could also use the search box at the top right to quickly find the format you need, whether it's SUB or something else.
Get your SUB files after MConverter has finished processing them
Click on DOWNLOAD ALL to save your SUBs to your default downloads folder, or select SAVE TO to choose another location.

You can also configure automatic file downloads during the conversion process or in the settings menu. When enabled, each SUB file is downloaded as soon as its conversion is complete, without waiting for the others to finish.

If supported by your device, you'll see a Share icon, allowing you to directly send converted files to other apps.

About the formats

File extension	.smi
Alternative filename extension	.sami
Category	Subtitles file formats
Developed by	Microsoft
Mime type	application/x-sami

Format 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.

File extension	.sub
Category	Subtitles file formats
Developed by	Tiamat Software
Mime type	text/x-microdvd

Format 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.

Common questions about converting SAMI to SUB

Can I convert SAMI to SUB in bulk?

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

Can I convert a SAMI file to SUB, if its size is 2 GB?

Yes, with MConverter Pro you can convert big SAMIs, up to 2 gigabytes each.
The free version lets you convert files up to 100 MB. If you need to convert SAMI files over 100 megabytes, try MConverter Pro. If your files aren’t over 1 GB, then you can use MConverter Plus instead, as it’s cheaper.

Is converting SAMIs to SUB safe with MConverter?

Yes, we encrypt your connection using industry standards. Plus, your SAMI 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 SAMIs and other converted files immediately after finishing the conversion by clicking the bin icon.
Join thousands who have trusted us to convert over 15,880,767 files so far.

How long does it take to convert SAMI to SUB?

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).