LanguageSMI
Microsoft SAMI subtitles
File type: Text file
Files with smi extension can be often found as subtitles in Microsoft's Synchronized Accessible Media Interchange (SAMI) format.
Found 6 different file type records with the same smi filename suffix.
What is smi file?
File type category:
Text file
Date updated: July 13, 2025
File extension smi is mainly related to SAMI (Synchronized Accessible Media Interchange) subtitles format developed by Microsoft. It is based on both HTML and CSS and stores subtitles in a text based format.
Nowadays, this format is somewhat rare, because most subtitles are in common formats like SRT or SUB.
How to open smi file?
Several media players still support *.smi subtitles.
How to convert smi file?
Some subtitles editors and converters may still support SMI format and convert it to one of the newer formats.
Suggested software to open smi file:
Associated software actions with the smi file
Apps designed for playing smi files:
Microsoft Windows Media Player (Microsoft Windows)
VLC media player (Microsoft Windows)
KMPlayer (Microsoft Windows)
Apple QuickTime (Microsoft Windows)
MPlayer (Microsoft Windows)
GOM Media Player (Microsoft Windows)
VLC media player for Mac (Apple macOS / Mac OS X)
Apple QuickTime for Mac (Apple macOS / Mac OS X)
MPlayer for Mac (Apple macOS / Mac OS X)
VLC media player for Linux (Linux/Unix)
Xine (Linux/Unix)
MPlayer for Linux (Linux/Unix)
Software apps that convert smi files:
URUworks Subtitle Workshop (Multiplatform)
Software apps that import smi files:
VobSub (Microsoft Windows)
Subtitle Converter (Apple macOS / Mac OS X)
Daylight SMILES data
File type category:
Various data file
Date updated: February 25, 2018
The smi file extension is related to the SMILES, a simple yet comprehensive chemical language in which molecules and reactions can be specified using ASCII characters representing atom and bond symbols.
SMILES development was initiated by David Weininger in the late 1980s using the concept of a graph with nodes as atoms and edges as bonds to represent a molecule.
Mime types:
chemical/x-daylight-smiles
chemical/x-x-daylight-smiles
How to open smi file?
Some specialized programs still support the SMO format and can work with it.
How to convert smi file?
It is unlikely that this file type can be converted to anything else.
IBM Lotus smart icons
File type category:
Graphics file
Date updated: April 2, 2019
The same as CC: Mail Smart icon. CC: Mail Smart icon technology was implemented in Lotus.
Most likely some old format without support from developer. No further information could be found.
Suggested software to open smi file:
Associated software actions with the smi file
Software applications that handle other tasks involving smi files:
Lotus 1-2-3 (Microsoft Windows)
Mac Self-mounting disk image
File type category:
Disk image (ISO) binary file
Date updated: November 29, 2024
The smi file extension is related to Self-mounting disk image format used on Macintosh Classic platform before the introduction of DMG file format.
How to open smi file?
The SMI images can be handled by programs like DropDMG.
How to convert smi file?
DropDMG program might be able to convert this format to the newer DMG.
Suggested software to open smi file:
Associated software actions with the smi file
Software applications that can open smi files:
Apple Disk Utility (Apple macOS / Mac OS X)
DropDMG (Apple macOS / Mac OS X)
Software apps that create smi files:
DropDMG (Apple macOS / Mac OS X)
Software apps that export smi files:
DropDMG (Apple macOS / Mac OS X)
Software apps that extract smi files:
Apple Disk Utility (Apple macOS / Mac OS X)
DropDMG (Apple macOS / Mac OS X)
Software applications that handle other tasks involving smi files:
Mac OS X (Apple macOS / Mac OS X)
macOS (Apple macOS / Mac OS X)
Siemens mobile phone inbox SMS data
File type category:
Mobile phones related file
Date updated: December 5, 2018
The smi file extension is also associated with the SiSMS, a software for Windows operating system that allows users to backup SMS messages from Siemens phones.
This type of .smi files contains archived SMS exported from from Siemens phones.
How to open smi file?
You can access this type of *.smi files using SiSmS app.
How to convert smi file?
Individual SMS messages can be probably exported from *.smi files and saved as text files.
Associated software actions with the smi file
Programs for viewing smi files:
SiSMS (Microsoft Windows)
Synchronized Multimedia Integration Language presentation
File type category:
Source code and script file
Internet related file
Date updated: October 27, 2024
The smi file extension is also used for multimedia presentation files based on the Synchronized Multimedia Integration Language, a a World Wide Web Consortium recommended Extensible Markup Language (XML) markup language to describe multimedia presentations.
It is a combination of HTTP and XML. which can be used for numerous purposes.
How to open smi file?
Several multimedia players are also able to playback these presentations.
How to convert smi file?
It doesn't look like this format can be easily converted to anything else.
Associated software actions with the smi file
Apps designed for playing smi files:
RealPlayer (Microsoft Windows)
Microsoft Windows Media Player (Microsoft Windows)
Adobe Media Player (Microsoft Windows)
Zune (Microsoft Windows)
QuickTime Player for Mac (Apple macOS / Mac OS X)
Adobe Media Player for Mac (Apple macOS / Mac OS X)
Totem (Linux/Unix)