---
title: "File extensions — what opens each file type"
description: "Every common file extension, what the format is, and which program opens it on Windows, macOS and Linux. Images, video, audio, documents, archives, code and more."
url: https://atoneplace.net/file/
site: "At One Place"
---

# File types

What a file extension means and which program opens it, for every format you are likely to be sent. Listed by what the file actually is, not by which company made it.

## 3D and CAD

- [.stl](https://atoneplace.net/file/stl/) — Stereolithography Model
- [.obj](https://atoneplace.net/file/obj/) — Wavefront OBJ Model
- [.fbx](https://atoneplace.net/file/fbx/) — Filmbox 3D Scene
- [.gcode](https://atoneplace.net/file/gcode/) — G-code Toolpath
- [.blend](https://atoneplace.net/file/blend/) — Blender Project
- [.3mf](https://atoneplace.net/file/3mf/) — 3D Manufacturing Format
- [.3ds](https://atoneplace.net/file/3ds/) — 3D Studio Model

## Archives

- [.zip](https://atoneplace.net/file/zip/) — ZIP Archive
- [.rar](https://atoneplace.net/file/rar/) — RAR Archive
- [.7z](https://atoneplace.net/file/7z/) — 7-Zip Archive
- [.gz](https://atoneplace.net/file/gz/) — Gzip Compressed File
- [.tar](https://atoneplace.net/file/tar/) — Tape Archive
- [.tgz](https://atoneplace.net/file/tgz/) — Gzipped Tar Archive
- [.xz](https://atoneplace.net/file/xz/) — XZ Compressed File
- [.bz2](https://atoneplace.net/file/bz2/) — Bzip2 Compressed File
- [.sfx](https://atoneplace.net/file/sfx/) — Self-Extracting Archive Module

## Audio

- [.mp3](https://atoneplace.net/file/mp3/) — MPEG-1 Audio Layer III
- [.wav](https://atoneplace.net/file/wav/) — Waveform Audio File
- [.m4a](https://atoneplace.net/file/m4a/) — MPEG-4 Audio
- [.flac](https://atoneplace.net/file/flac/) — Free Lossless Audio Codec
- [.aac](https://atoneplace.net/file/aac/) — Advanced Audio Coding
- [.ogg](https://atoneplace.net/file/ogg/) — Ogg Vorbis Audio
- [.opus](https://atoneplace.net/file/opus/) — Opus Audio
- [.mid](https://atoneplace.net/file/mid/) — MIDI Sequence
- [.m3u](https://atoneplace.net/file/m3u/) — Media Playlist
- [.wma](https://atoneplace.net/file/wma/) — Windows Media Audio
- [.aiff](https://atoneplace.net/file/aiff/) — Audio Interchange File Format
- [.m4b](https://atoneplace.net/file/m4b/) — MPEG-4 Audiobook
- [.amr](https://atoneplace.net/file/amr/) — Adaptive Multi-Rate Audio
- [.caf](https://atoneplace.net/file/caf/) — Core Audio Format

## CAD

- [.dwg](https://atoneplace.net/file/dwg/) — AutoCAD Drawing
- [.dxf](https://atoneplace.net/file/dxf/) — Drawing Exchange Format
- [.step](https://atoneplace.net/file/step/) — STEP 3D Model

## Code and scripts

- [.html](https://atoneplace.net/file/html/) — HyperText Markup Language
- [.js](https://atoneplace.net/file/js/) — JavaScript Source
- [.css](https://atoneplace.net/file/css/) — Cascading Style Sheet
- [.py](https://atoneplace.net/file/py/) — Python Source
- [.java](https://atoneplace.net/file/java/) — Java Source
- [.tsx](https://atoneplace.net/file/tsx/) — TypeScript Source (JSX)
- [.cpp](https://atoneplace.net/file/cpp/) — C++ Source
- [.php](https://atoneplace.net/file/php/) — PHP Source
- [.c](https://atoneplace.net/file/c/) — C Source
- [.cs](https://atoneplace.net/file/cs/) — C# Source
- [.go](https://atoneplace.net/file/go/) — Go Source
- [.rs](https://atoneplace.net/file/rs/) — Rust Source
- [.rb](https://atoneplace.net/file/rb/) — Ruby Source

## Data

- [.csv](https://atoneplace.net/file/csv/) — Comma-Separated Values
- [.json](https://atoneplace.net/file/json/) — JavaScript Object Notation
- [.xml](https://atoneplace.net/file/xml/) — Extensible Markup Language
- [.yaml](https://atoneplace.net/file/yaml/) — YAML Data File
- [.log](https://atoneplace.net/file/log/) — Log File
- [.torrent](https://atoneplace.net/file/torrent/) — BitTorrent Metainfo File
- [.dat](https://atoneplace.net/file/dat/) — Generic Data File
- [.vcf](https://atoneplace.net/file/vcf/) — vCard Contact File
- [.sql](https://atoneplace.net/file/sql/) — SQL Script
- [.ics](https://atoneplace.net/file/ics/) — iCalendar Event
- [.sqlite](https://atoneplace.net/file/sqlite/) — SQLite Database
- [.db](https://atoneplace.net/file/db/) — Generic Database File
- [.bin](https://atoneplace.net/file/bin/) — Binary File
- [.bak](https://atoneplace.net/file/bak/) — Backup File
- [.ini](https://atoneplace.net/file/ini/) — Initialisation / Configuration File
- [.tmp](https://atoneplace.net/file/tmp/) — Temporary File
- [.tsv](https://atoneplace.net/file/tsv/) — Tab-Separated Values
- [.accdb](https://atoneplace.net/file/accdb/) — Microsoft Access Database
- [.gpx](https://atoneplace.net/file/gpx/) — GPS Exchange Format
- [.cfg](https://atoneplace.net/file/cfg/) — Configuration File
- [.crdownload](https://atoneplace.net/file/crdownload/) — Chrome Partial Download
- [.kmz](https://atoneplace.net/file/kmz/) — Google Earth Placemark Archive
- [.pem](https://atoneplace.net/file/pem/) — PEM Certificate or Key
- [.gitignore](https://atoneplace.net/file/gitignore/) — Git Ignore File
- [.lnk](https://atoneplace.net/file/lnk/) — Windows Shortcut
- [.toml](https://atoneplace.net/file/toml/) — Tom's Obvious Minimal Language
- [.parquet](https://atoneplace.net/file/parquet/) — Apache Parquet
- [.mdb](https://atoneplace.net/file/mdb/) — Microsoft Access Database (legacy)
- [.env](https://atoneplace.net/file/env/) — Environment Variable File
- [.reg](https://atoneplace.net/file/reg/) — Windows Registry File
- [.jsonl](https://atoneplace.net/file/jsonl/) — JSON Lines
- [.part](https://atoneplace.net/file/part/) — Partial Download
- [.ds_store](https://atoneplace.net/file/ds_store/) — macOS Desktop Services Store
- [.geojson](https://atoneplace.net/file/geojson/) — GeoJSON
- [.pfx](https://atoneplace.net/file/pfx/) — PKCS #12 Certificate Bundle
- [.url](https://atoneplace.net/file/url/) — Internet Shortcut
- [.lock](https://atoneplace.net/file/lock/) — Lock File
- [.ndjson](https://atoneplace.net/file/ndjson/) — Newline-Delimited JSON
- [.csr](https://atoneplace.net/file/csr/) — Certificate Signing Request
- [.avro](https://atoneplace.net/file/avro/) — Apache Avro

## Disk images

- [.iso](https://atoneplace.net/file/iso/) — ISO Disc Image
- [.dmg](https://atoneplace.net/file/dmg/) — Apple Disk Image
- [.vmdk](https://atoneplace.net/file/vmdk/) — Virtual Machine Disk
- [.cue](https://atoneplace.net/file/cue/) — Cue Sheet

## Documents

- [.pdf](https://atoneplace.net/file/pdf/) — Portable Document Format
- [.docx](https://atoneplace.net/file/docx/) — Word Document (Open XML)
- [.xlsx](https://atoneplace.net/file/xlsx/) — Excel Workbook (Open XML)
- [.pptx](https://atoneplace.net/file/pptx/) — PowerPoint Presentation (Open XML)
- [.txt](https://atoneplace.net/file/txt/) — Plain Text File
- [.doc](https://atoneplace.net/file/doc/) — Word Document (legacy binary)
- [.xls](https://atoneplace.net/file/xls/) — Excel Workbook (legacy binary)
- [.ppt](https://atoneplace.net/file/ppt/) — PowerPoint Presentation (legacy binary)
- [.md](https://atoneplace.net/file/md/) — Markdown Document
- [.rtf](https://atoneplace.net/file/rtf/) — Rich Text Format
- [.pages](https://atoneplace.net/file/pages/) — Apple Pages Document
- [.odt](https://atoneplace.net/file/odt/) — OpenDocument Text
- [.eml](https://atoneplace.net/file/eml/) — Email Message
- [.key](https://atoneplace.net/file/key/) — Apple Keynote Presentation
- [.msg](https://atoneplace.net/file/msg/) — Outlook Message
- [.xlsm](https://atoneplace.net/file/xlsm/) — Excel Macro-Enabled Workbook
- [.numbers](https://atoneplace.net/file/numbers/) — Apple Numbers Spreadsheet
- [.indd](https://atoneplace.net/file/indd/) — Adobe InDesign Document
- [.ods](https://atoneplace.net/file/ods/) — OpenDocument Spreadsheet
- [.vsdx](https://atoneplace.net/file/vsdx/) — Microsoft Visio Drawing
- [.pst](https://atoneplace.net/file/pst/) — Outlook Personal Storage Table
- [.pub](https://atoneplace.net/file/pub/) — Microsoft Publisher Document
- [.odp](https://atoneplace.net/file/odp/) — OpenDocument Presentation
- [.sketch](https://atoneplace.net/file/sketch/) — Sketch Design Document
- [.docm](https://atoneplace.net/file/docm/) — Word Macro-Enabled Document
- [.mpp](https://atoneplace.net/file/mpp/) — Microsoft Project Plan
- [.chm](https://atoneplace.net/file/chm/) — Compiled HTML Help
- [.xd](https://atoneplace.net/file/xd/) — Adobe XD Document
- [.one](https://atoneplace.net/file/one/) — OneNote Section
- [.dotx](https://atoneplace.net/file/dotx/) — Word Template (Open XML)
- [.wpd](https://atoneplace.net/file/wpd/) — WordPerfect Document

## E-books

- [.epub](https://atoneplace.net/file/epub/) — Electronic Publication
- [.mobi](https://atoneplace.net/file/mobi/) — Mobipocket Ebook
- [.azw3](https://atoneplace.net/file/azw3/) — Kindle Format 8
- [.cbz](https://atoneplace.net/file/cbz/) — Comic Book Archive (ZIP)
- [.cbr](https://atoneplace.net/file/cbr/) — Comic Book Archive (RAR)
- [.djvu](https://atoneplace.net/file/djvu/) — DjVu Scanned Document

## Programs and installers

- [.exe](https://atoneplace.net/file/exe/) — Windows Executable
- [.apk](https://atoneplace.net/file/apk/) — Android Application Package
- [.msi](https://atoneplace.net/file/msi/) — Windows Installer Package
- [.dll](https://atoneplace.net/file/dll/) — Dynamic Link Library
- [.sh](https://atoneplace.net/file/sh/) — Shell Script
- [.deb](https://atoneplace.net/file/deb/) — Debian Software Package
- [.jar](https://atoneplace.net/file/jar/) — Java Archive
- [.bat](https://atoneplace.net/file/bat/) — Windows Batch File
- [.pkg](https://atoneplace.net/file/pkg/) — macOS Installer Package
- [.ps1](https://atoneplace.net/file/ps1/) — PowerShell Script
- [.ipa](https://atoneplace.net/file/ipa/) — iOS Application Archive
- [.rpm](https://atoneplace.net/file/rpm/) — RPM Package
- [.appimage](https://atoneplace.net/file/appimage/) — AppImage Portable Application

## Fonts

- [.ttf](https://atoneplace.net/file/ttf/) — TrueType Font
- [.otf](https://atoneplace.net/file/otf/) — OpenType Font
- [.woff2](https://atoneplace.net/file/woff2/) — Web Open Font Format 2
- [.woff](https://atoneplace.net/file/woff/) — Web Open Font Format

## Images

- [.jpg](https://atoneplace.net/file/jpg/) — JPEG Image
- [.png](https://atoneplace.net/file/png/) — Portable Network Graphics
- [.jpeg](https://atoneplace.net/file/jpeg/) — JPEG Image (four-letter form)
- [.heic](https://atoneplace.net/file/heic/) — High Efficiency Image Container
- [.webp](https://atoneplace.net/file/webp/) — WebP Image
- [.gif](https://atoneplace.net/file/gif/) — Graphics Interchange Format
- [.psd](https://atoneplace.net/file/psd/) — Adobe Photoshop Document
- [.svg](https://atoneplace.net/file/svg/) — Scalable Vector Graphics
- [.ai](https://atoneplace.net/file/ai/) — Adobe Illustrator Artwork
- [.avif](https://atoneplace.net/file/avif/) — AV1 Image File Format
- [.tiff](https://atoneplace.net/file/tiff/) — Tagged Image File Format
- [.raw](https://atoneplace.net/file/raw/) — Camera Raw Image
- [.ico](https://atoneplace.net/file/ico/) — Windows Icon
- [.eps](https://atoneplace.net/file/eps/) — Encapsulated PostScript
- [.heif](https://atoneplace.net/file/heif/) — High Efficiency Image File Format
- [.bmp](https://atoneplace.net/file/bmp/) — Windows Bitmap
- [.dng](https://atoneplace.net/file/dng/) — Digital Negative
- [.cr2](https://atoneplace.net/file/cr2/) — Canon Raw Version 2
- [.jfif](https://atoneplace.net/file/jfif/) — JPEG File Interchange Format
- [.nef](https://atoneplace.net/file/nef/) — Nikon Electronic Format
- [.arw](https://atoneplace.net/file/arw/) — Sony Alpha Raw
- [.dcm](https://atoneplace.net/file/dcm/) — DICOM Medical Image
- [.xcf](https://atoneplace.net/file/xcf/) — GIMP Image

## Video

- [.mp4](https://atoneplace.net/file/mp4/) — MPEG-4 Part 14 Video
- [.mov](https://atoneplace.net/file/mov/) — QuickTime Movie
- [.mkv](https://atoneplace.net/file/mkv/) — Matroska Video
- [.avi](https://atoneplace.net/file/avi/) — Audio Video Interleave
- [.srt](https://atoneplace.net/file/srt/) — SubRip Subtitle
- [.webm](https://atoneplace.net/file/webm/) — WebM Video
- [.ts](https://atoneplace.net/file/ts/) — MPEG Transport Stream
- [.wmv](https://atoneplace.net/file/wmv/) — Windows Media Video
- [.mpg](https://atoneplace.net/file/mpg/) — MPEG-1 / MPEG-2 Video
- [.m4v](https://atoneplace.net/file/m4v/) — iTunes Video
- [.vtt](https://atoneplace.net/file/vtt/) — WebVTT Caption
- [.swf](https://atoneplace.net/file/swf/) — Shockwave Flash Movie
- [.mts](https://atoneplace.net/file/mts/) — AVCHD Video
- [.vob](https://atoneplace.net/file/vob/) — DVD Video Object
- [.flv](https://atoneplace.net/file/flv/) — Flash Video
- [.ass](https://atoneplace.net/file/ass/) — Advanced SubStation Alpha Subtitle

## Sources

- Media Types Registry — IANA (https://www.iana.org/assignments/media-types/)