Category Overview

Data File Extensions

Data file extensions are used by databases, applications, scientific tools, configuration systems, and structured datasets. Browse the formats below to identify a data file and find software that may read, import, edit, or export it.

441
Data Extensions
Category Guide

How to identify and use data file formats

Data files can be plain text, structured records, binary databases, caches, or application-specific resources. Avoid editing an unknown data file directly, keep a backup, and use the application that originally created it whenever possible.

Filter Extensions

Filter this category by the first letter of the extension.

441 Data Extensions Available
.PICKLE

Pickle Data

Pickle is a Python-specific file format used for serializing and de-serializing Python object structures. It allows you to save the sta...

Data
.CATIA PART (.CATPART)

CATIA Part

A .CATPart file is a 3D CAD (Computer-Aided Design) part file created by CATIA (Computer-Aided Three Dimensional Interactive Applicatio...

Data
.SDB

StarOffice Database

The SDB file extension is primarily associated with StarOffice and OpenOffice.org, specifically their database component, Base. It repr...

Data
.HTML

HyperText Markup Language

HTML (HyperText Markup Language) is the standard markup language for creating web pages. It provides the structure and content of a web...

Data
.BIP

Binary Image Partition

A .bip file is a Binary Image Partition file, often associated with firmware images for embedded systems and devices. These files typic...

Data
.LDF

SQL Server Log File

An LDF file is a log file used by Microsoft SQL Server. It contains a record of all transactions and database changes made to a corresp...

Data
.PSQL

PostgreSQL Query File

A .psql file is a plain text file containing SQL queries designed to be executed against a PostgreSQL database. These files are essenti...

Data
.SRT

SubRip Subtitle File

The SRT (SubRip Subtitle) file format is a plain text file format used to store subtitles for video content. It's one of the most basic...

Data
.GNUMERIC

Gnumeric Spreadsheet

The .gnumeric file extension is associated with spreadsheet files created by Gnumeric, a free and open-source spreadsheet program. Gnum...

Data
.DMP

Memory Dump File

A DMP file, short for Memory Dump file, is a snapshot of a computer's memory at a specific point in time. These files are typically cre...

Data
.HDD

Hard Disk Image

A .hdd file is a hard disk image file, essentially a complete sector-by-sector copy of a physical hard drive or a partition. It contain...

Data
.STL (.STL)

Stereolithography

STL (Stereolithography) is a file format native to the stereolithography CAD software created by 3D Systems. STL files describe only th...

Data
.POL

Plain Old Telephone

The .pol file extension is associated with Plain Old Telephone (POT) data files. These files typically contain configuration informatio...

Data
.APKM

APK Manifest

The APKM file extension typically refers to the manifest file associated with an Android Package Kit (APK). While the APK itself is an...

Data
.DXF

Drawing Exchange Format

The Drawing Exchange Format (DXF) is a CAD (Computer-Aided Design) data file format developed by Autodesk for enabling data interoperab...

Data
.REG

Registry Entries

A .reg file is a text-based file format used by Microsoft Windows to store and import registry settings. The Windows Registry is a hier...

Data
.NETCDF

Network Common Data Form

NetCDF (Network Common Data Form) is a set of software libraries and self-describing, machine-independent data formats that support the...

Data
.ASCIIDOC

AsciiDoc

AsciiDoc is a human-readable document format that is semantically equivalent to DocBook XML, but uses a plain text markup language. It'...

Data
.X3D

Extensible 3D Graphics

X3D (Extensible 3D Graphics) is an open, royalty-free ISO standard for defining 3D computer graphics. It is the successor to VRML (Virt...

Data
.DRAWIO

draw.io Diagram File

The .drawio file format is used by draw.io (now diagrams.net), a free, open-source diagramming application. It stores diagrams, flowcha...

Data
.TEXTFILE

Plain Text File

A plain text file (.txt) is a simple, unformatted document that contains only text characters, adhering to a character encoding standar...

Data
.ASX

Advanced Stream Redirector

The ASX file format, short for Advanced Stream Redirector, is a type of XML-based metafile used by Microsoft's Windows Media Player. It...

Data
.MHT

MHTML Web Archive

MHTML (MIME HTML) is a web page archive format used to combine, in a single document, the HTML code and its associated resources such a...

Data
.ESRI GRID

Esri Grid

The Esri Grid format is a raster data storage format used by Esri's ArcGIS software for representing geographic data. It's a fundamenta...

Data
.PICKLE

Pickle Data

Pickle is a Python-specific file format used for serializing and de-serializing Python object structures. It allows you to save the state of Python ob...

.CATIA PART (.CATPART)

CATIA Part

A .CATPart file is a 3D CAD (Computer-Aided Design) part file created by CATIA (Computer-Aided Three Dimensional Interactive Application), a multi-pla...

.SDB

StarOffice Database

The SDB file extension is primarily associated with StarOffice and OpenOffice.org, specifically their database component, Base. It represents a databa...

.HTML

HyperText Markup Language

HTML (HyperText Markup Language) is the standard markup language for creating web pages. It provides the structure and content of a webpage, defining...

.BIP

Binary Image Partition

A .bip file is a Binary Image Partition file, often associated with firmware images for embedded systems and devices. These files typically contain a...

.LDF

SQL Server Log File

An LDF file is a log file used by Microsoft SQL Server. It contains a record of all transactions and database changes made to a corresponding SQL Serv...

.PSQL

PostgreSQL Query File

A .psql file is a plain text file containing SQL queries designed to be executed against a PostgreSQL database. These files are essentially scripts th...

.SRT

SubRip Subtitle File

The SRT (SubRip Subtitle) file format is a plain text file format used to store subtitles for video content. It's one of the most basic and widely sup...

.GNUMERIC

Gnumeric Spreadsheet

The .gnumeric file extension is associated with spreadsheet files created by Gnumeric, a free and open-source spreadsheet program. Gnumeric is designe...

.DMP

Memory Dump File

A DMP file, short for Memory Dump file, is a snapshot of a computer's memory at a specific point in time. These files are typically created when a pro...

.HDD

Hard Disk Image

A .hdd file is a hard disk image file, essentially a complete sector-by-sector copy of a physical hard drive or a partition. It contains all the data...

.STL (.STL)

Stereolithography

STL (Stereolithography) is a file format native to the stereolithography CAD software created by 3D Systems. STL files describe only the surface geome...

.POL

Plain Old Telephone

The .pol file extension is associated with Plain Old Telephone (POT) data files. These files typically contain configuration information or data relat...

.APKM

APK Manifest

The APKM file extension typically refers to the manifest file associated with an Android Package Kit (APK). While the APK itself is an archive contain...

.DXF

Drawing Exchange Format

The Drawing Exchange Format (DXF) is a CAD (Computer-Aided Design) data file format developed by Autodesk for enabling data interoperability between A...

.REG

Registry Entries

A .reg file is a text-based file format used by Microsoft Windows to store and import registry settings. The Windows Registry is a hierarchical databa...

.NETCDF

Network Common Data Form

NetCDF (Network Common Data Form) is a set of software libraries and self-describing, machine-independent data formats that support the creation, acce...

.ASCIIDOC

AsciiDoc

AsciiDoc is a human-readable document format that is semantically equivalent to DocBook XML, but uses a plain text markup language. It's designed for...

.X3D

Extensible 3D Graphics

X3D (Extensible 3D Graphics) is an open, royalty-free ISO standard for defining 3D computer graphics. It is the successor to VRML (Virtual Reality Mod...

.DRAWIO

draw.io Diagram File

The .drawio file format is used by draw.io (now diagrams.net), a free, open-source diagramming application. It stores diagrams, flowcharts, UML diagra...

.TEXTFILE

Plain Text File

A plain text file (.txt) is a simple, unformatted document that contains only text characters, adhering to a character encoding standard such as ASCII...

.ASX

Advanced Stream Redirector

The ASX file format, short for Advanced Stream Redirector, is a type of XML-based metafile used by Microsoft's Windows Media Player. It essentially ac...

.MHT

MHTML Web Archive

MHTML (MIME HTML) is a web page archive format used to combine, in a single document, the HTML code and its associated resources such as images, audio...

.ESRI GRID

Esri Grid

The Esri Grid format is a raster data storage format used by Esri's ArcGIS software for representing geographic data. It's a fundamental format for st...