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File Extensions

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

23
Indexed file extensions

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23 extensions
Data Letter: O Clear all
.OBB

Opaque Binary Blob

Data
.OBJ (.OBJ)

Wavefront OBJ File

Data
.ODB

OpenDocument Database

Data
.ODP

OpenDocument Presentation

Data
.ODS

OpenDocument Spreadsheet

Data
.OFX

Open Financial Exchange

Data
.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
.OPML

Outline Processor Markup Language

Data
.ORC

Optimized Row Columnar

Data
.OSGB

OpenSceneGraph Binary File

Data
.OSGT

OpenSceneGraph Text File

Data
.OSM

OpenStreetMap Map

Data
.OSU

osu! Beatmap File

Data
.OTF

OpenType Font

Data
.OTIO

Open Timeline I/O

Data
.OTP

OpenDocument Presentation Template

Data
.OTS

OpenDocument Spreadsheet Template

Data

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.