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FileFormatProperties["fmt"]

returns an association of properties for the specified format "fmt".

FileFormatProperties["fmt","prop"]

returns the property "prop" for the format "fmt".

FileFormatProperties["fmt",{"prop1","prop2",…}]

returns multiple properties.

Details
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Properties & Relations  
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FileFormatProperties   

Listing of Formats »

FileFormatProperties["fmt"]

returns an association of properties for the specified format "fmt".

FileFormatProperties["fmt","prop"]

returns the property "prop" for the format "fmt".

FileFormatProperties["fmt",{"prop1","prop2",…}]

returns multiple properties.

Details

  • FileFormatProperties can return properties used by Import and Export.
  • For the full list of supported import and export formats, see $ImportFormats and $ExportFormats.
  • FileFormatProperties[] returns all properties for all registered import and export formats.
  • Available format properties include:
  • "FileNamePatterns"list of file name patterns associated to a format
    "MIMETypes"list of MIME types associated to a format
  • Import properties:
  • "ImportElements"import elements available for a format
    "DefaultImportElement"the element used as the default import element

Examples

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Basic Examples  (2)

Get all properties for the "CSV" format:

Wolfram Language code: FileFormatProperties["CSV"]

Get import elements for the "Text" format:

Wolfram Language code: FileFormatProperties["Text", "ImportElements"]

Scope  (5)

Get file name patterns for the "JPEG" format:

Wolfram Language code: FileFormatProperties["JPEG", "FileNamePatterns"]

Get MIME types for the "MP4" format:

Wolfram Language code: FileFormatProperties["MP4", "MIMETypes"]

Get the list of elements and file name patterns for the "CSV" and "XLSX" formats:

Wolfram Language code: FileFormatProperties[{"CSV", "XLSX"}, {"ImportElements", "FileNamePatterns"}]

Get the default element for all formats:

Wolfram Language code: FileFormatProperties[All, "DefaultImportElement"]//Short

Get all properties for all formats:

Wolfram Language code: Short[FileFormatProperties[], 10]

Applications  (2)

Find all formats that by default import as an image:

Wolfram Language code: Select[FileFormatProperties[All, "DefaultImportElement"], # == "Image"&]//Keys

Find all formats that could be imported as audio:

Wolfram Language code: Select[FileFormatProperties[All, "ImportElements"], MemberQ[#, "Audio"]&]//Keys

Properties & Relations  (1)

An export-only format returns None for import properties:

Wolfram Language code: MemberQ[$ImportFormats, "SVG"]
Wolfram Language code: MemberQ[$ExportFormats, "SVG"]
Wolfram Language code: FileFormatProperties["SVG", "DefaultImportElement"]
Wolfram Research (2021), FileFormatProperties, Wolfram Language function, https://reference.wolfram.com/language/ref/FileFormatProperties.html.

Text

Wolfram Research (2021), FileFormatProperties, Wolfram Language function, https://reference.wolfram.com/language/ref/FileFormatProperties.html.

CMS

Wolfram Language. 2021. "FileFormatProperties." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/FileFormatProperties.html.

APA

Wolfram Language. (2021). FileFormatProperties. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/FileFormatProperties.html

BibTeX

@misc{reference.wolfram_2026_fileformatproperties, author="Wolfram Research", title="{FileFormatProperties}", year="2021", howpublished="\url{https://reference.wolfram.com/language/ref/FileFormatProperties.html}", note=[Accessed: 13-June-2026]}

BibLaTeX

@online{reference.wolfram_2026_fileformatproperties, organization={Wolfram Research}, title={FileFormatProperties}, year={2021}, url={https://reference.wolfram.com/language/ref/FileFormatProperties.html}, note=[Accessed: 13-June-2026]}