A daily updated filename extension database!

SMIL file extension

The table below provides useful information about the .smil file extension. It answers questions such as:

  • What is the .smil file?
  • What program do I need to open a .smil file?
  • How can the .smil file be opened, edited or printed?
  • How can I convert .smil files to another format?

We hope you find this page helpful and a valuable resource!

0 extension(s) and 2 alias(es) found in database

✅ Synchronized Multimedia Integration Language

SMI file a Synchronized Multimedia Integration Language document. SMIL is a W3C Recommended XML markup language for describing multimedia presentations.
Category: Multimedia files
Application: Windows Media Player
Mime-type: application/x-smil
Magic number: -
Magic string: -
Sample: -
SMI aliases:
SMI related links:
SMI related extensions:
Extensible Markup Language File

M3U Playlist File

M4U Playlist File

RealPix Clip

XML Shareable Playlist File

Sandisk Sansa Playlist

✅ SMIL Document

SML file is a SMIL Document. The Synchronized Multimedia Integration Language, is a W3C recommended XML markup language for describing multimedia presentations.
Category: Multimedia files
Application: QuickTime Player
Mime-type: application/smil+xml
Magic number: -
Magic string: -
Sample: -
SML aliases:
SML related links:
SML related extensions:

Other types of files may also use the .smil file extension.

🚫 The .smil file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

mil, msil, sil, smi, sml, smol

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

CALS Compressed Bitmap
Micro Illustrator Uncompressed Image
PTC Creo Milling Parameter Data
Commodore 64 Micro Illustrator Image
SMILES Chemical Document
Silhouette Designer Document
SmartInspect Log
Synchronized Multimedia Integration Language
SMIL Document
Simile Model

🔴 Can't open a .smil file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .smil file association, check the FAQ.

🔴 Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .smil file extension, write to us!

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