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File Extensions

Clear explanations, compatible software, and practical guidance for file extensions.

32
Indexed file extensions
Popular searches:
.docx .psb .phtml .odt .pdf .7z

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32 extensions
Letter: O Clear all
.OBB

Opaque Binary Blob

Data
.OBJ (.OBJ)

Wavefront OBJ File

Data
.OCX

OLE Control Extension 4

Executable
.OCX (OLE CONTROL EXTENSION - OLDER WINDOWS TECHNOL

OLE Control Extension

Executable
.OCX (OLE CONTROL EXTENSION - OLDER WINDOWS TECHNOL

OLE Control Extension

Executable
.OCX (OLE CONTROL EXTENSION - OLDER WINDOWS TECHNOL

OLE Control Extension

Executable
.ODB

OpenDocument Database

Data
.ODP

OpenDocument Presentation

Data
.ODS

OpenDocument Spreadsheet

Data
.ODT

OpenDocument Text Document

Document
.OFX

Open Financial Exchange

Data
.OGG

Ogg Vorbis

Audio
.OLECONTROLEXTENSION1

Unknown OLE Control Extension File

Data
.OLECONTROLEXTENSION10

OLE Control Extension 1.0

Data
.OLECONTROLEXTENSION2

OLE Control Extension 2

Data
.OLECONTROLEXTENSION6

OLE Control Extension 6

Data
.OLECONTROLEXTENSION7

Unknown OLE Control Extension 7 File

Data
.OLECONTROLEXTENSION8

Unknown OLE Control Extension 8 File

Data
.OLECONTROLEXTENSION9

Unknown OLE Control Extension 9 File

Data
.OMF

Open Media Framework

Audio
.OPML

Outline Processor Markup Language

Data
.OPUS

Opus Audio File

Audio
.ORC

Optimized Row Columnar

Data
.ORF

Olympus Raw Format

Image
.OBB

Opaque Binary Blob

Data
.OBJ (.OBJ)

Wavefront OBJ File

Data
.OCX

OLE Control Extension 4

Executable
.OCX (OLE CONTROL EXTENSION - OLDER WINDOWS TECHNOL

OLE Control Extension

Executable
.OCX (OLE CONTROL EXTENSION - OLDER WINDOWS TECHNOL

OLE Control Extension

Executable
.OCX (OLE CONTROL EXTENSION - OLDER WINDOWS TECHNOL

OLE Control Extension

Executable
.ODB

OpenDocument Database

Data
.ODP

OpenDocument Presentation

Data
.ODS

OpenDocument Spreadsheet

Data
.ODT

OpenDocument Text Document

Document
.OFX

Open Financial Exchange

Data
.OGG

Ogg Vorbis

Audio
.OLECONTROLEXTENSION1

Unknown OLE Control Extension File

Data
.OLECONTROLEXTENSION10

OLE Control Extension 1.0

Data
.OLECONTROLEXTENSION2

OLE Control Extension 2

Data
.OLECONTROLEXTENSION6

OLE Control Extension 6

Data
.OLECONTROLEXTENSION7

Unknown OLE Control Extension 7 File

Data
.OLECONTROLEXTENSION8

Unknown OLE Control Extension 8 File

Data
.OLECONTROLEXTENSION9

Unknown OLE Control Extension 9 File

Data
.OMF

Open Media Framework

Audio
.OPML

Outline Processor Markup Language

Data
.OPUS

Opus Audio File

Audio
.ORC

Optimized Row Columnar

Data
.ORF

Olympus Raw Format

Image
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Frequently Asked Questions

Everything you need to know about file extensions

You can search by entering a file extension directly in the search bar or browse the directory by category or alphabetical index.

Each listing provides a definition of the file extension, common use cases, compatible software, supported platforms, and related or alternative formats.

The database is updated regularly to reflect new file extensions, changes in software compatibility, and evolving file format standards.