Data lookups
File extensions
What opens .heic, .webp, .svg, .eps and hundreds of other files.
74 entries.
| Extension | Kind | What it is | Opens with |
|---|---|---|---|
| .heic / .heif | Image | Apple's high-efficiency photo format, default on iPhone. | Photos (Mac/iOS), Windows 10+ with HEIF extension, or convert to JPEG |
| .webp | Image | Google format with strong compression, widely used on the web. | All modern browsers, Photoshop 23+, GIMP, Paint |
| .avif | Image | Newer format with even better compression than WebP. | Modern browsers, GIMP, recent Photoshop |
| .svg | Image | Scalable vector graphic — XML text that scales to any size. | Browsers, Illustrator, Inkscape, Figma |
| .eps | Image | Encapsulated PostScript vector file, common in print. | Illustrator, Inkscape, CorelDRAW, Ghostscript |
| .ai | Image | Adobe Illustrator artwork. | Illustrator; Inkscape can often open it |
| .psd | Image | Photoshop layered document. | Photoshop, GIMP, Affinity Photo |
| .raw / .cr2 / .nef / .arw | Image | Unprocessed camera sensor data. | Lightroom, Capture One, RawTherapee, camera maker software |
| .jpg / .jpeg | Image | Compressed photo. Lossy — quality drops on each save. | Everything |
| .png | Image | Lossless image with transparency support. | Everything |
| .gif | Image | Limited to 256 colours; supports simple animation. | Everything |
| .tif / .tiff | Image | High-quality, often uncompressed. Common in print and scanning. | Photoshop, IrfanView, Preview |
| .ico | Image | Windows icon / favicon, holds several sizes. | Browsers, IcoFX, GIMP |
| Document | Fixed-layout document that looks the same everywhere. | Any browser, Acrobat Reader, Preview | |
| .docx / .doc | Document | Microsoft Word document. | Word, LibreOffice, Google Docs, Pages |
| .xlsx / .xls | Document | Microsoft Excel workbook. | Excel, LibreOffice Calc, Google Sheets, Numbers |
| .pptx / .ppt | Document | Microsoft PowerPoint presentation. | PowerPoint, LibreOffice Impress, Google Slides, Keynote |
| .odt / .ods / .odp | Document | OpenDocument text, spreadsheet, presentation. | LibreOffice, OpenOffice, Word 2016+ |
| .pages / .numbers / .key | Document | Apple iWork documents. | Pages / Numbers / Keynote, or iCloud.com |
| .rtf | Document | Rich text — formatting without a specific app. | Word, WordPad, TextEdit, LibreOffice |
| .txt | Document | Plain text, no formatting. | Any text editor |
| .md | Document | Markdown — plain text with light formatting marks. | VS Code, Typora, Obsidian, GitHub |
| .epub | Document | Reflowable e-book. | Apple Books, Calibre, Kobo, Google Play Books |
| .mobi / .azw3 | Document | Kindle e-book formats. | Kindle app, Calibre |
| .csv | Data | Comma-separated values — a plain-text table. | Excel, Google Sheets, any text editor |
| .tsv | Data | Tab-separated values. | Excel, text editors |
| .json | Data | JavaScript Object Notation — structured data. | Any text editor, browsers |
| .xml | Data | Extensible Markup Language. | Text editors, browsers |
| .yaml / .yml | Data | Human-friendly configuration format. | Any text editor |
| .sql | Data | Database script or dump. | MySQL Workbench, phpMyAdmin, text editors |
| .db / .sqlite | Data | SQLite database file. | DB Browser for SQLite |
| .zip | Archive | Compressed archive — the universal one. | Built into Windows, macOS, Linux |
| .rar | Archive | Proprietary archive, better compression than ZIP. | WinRAR, 7-Zip, The Unarchiver |
| .7z | Archive | Open, high-compression archive. | 7-Zip, Keka, The Unarchiver |
| .tar / .tar.gz / .tgz | Archive | Unix archive, usually gzip-compressed. | 7-Zip, tar command, macOS Archive Utility |
| .iso | Archive | Disc image — a whole CD/DVD in one file. | Mount in Windows/macOS, or 7-Zip, Rufus |
| .dmg | Archive | macOS disk image, usually an installer. | macOS Finder |
| .mp3 | Audio | Compressed audio, universally supported. | Everything |
| .wav | Audio | Uncompressed audio, large files. | Everything |
| .flac | Audio | Lossless compressed audio. | VLC, foobar2000, Apple Music (recent) |
| .aac / .m4a | Audio | Apple/streaming standard audio. | iTunes, VLC, most players |
| .ogg / .opus | Audio | Open audio formats; Opus excels for voice. | VLC, Firefox, Chrome |
| .mid / .midi | Audio | Musical instructions, not recorded sound. | DAWs, media players with a synth |
| .mp4 / .m4v | Video | The standard video container. | Everything |
| .mov | Video | QuickTime video, common from Apple devices. | QuickTime, VLC, most editors |
| .avi | Video | Older Microsoft container. | VLC, Windows Media Player |
| .mkv | Video | Matroska — flexible container, popular for HD video. | VLC, MPV, Plex |
| .webm | Video | Open web video format. | Browsers, VLC |
| .wmv | Video | Windows Media video. | Windows Media Player, VLC |
| .exe | Program | Windows executable. Only run ones you trust. | Windows |
| .msi | Program | Windows installer package. | Windows Installer |
| .app | Program | macOS application bundle. | macOS |
| .apk | Program | Android application package. | Android |
| .deb / .rpm | Program | Linux packages (Debian/Ubuntu and Red Hat/Fedora). | apt / dnf |
| .bat / .cmd | Script | Windows batch script. | Command Prompt |
| .ps1 | Script | PowerShell script. | PowerShell |
| .sh | Script | Shell script for Linux/macOS. | bash, zsh |
| .php | Code | PHP source, runs on the server. | Any editor; a web server to execute |
| .js / .mjs | Code | JavaScript source. | Any editor, browsers, Node.js |
| .ts | Code | TypeScript source. | VS Code and other editors |
| .py | Code | Python source. | Python, VS Code, PyCharm |
| .html / .htm | Code | Web page markup. | Browsers, any editor |
| .css | Code | Stylesheet. | Browsers, any editor |
| .ttf / .otf | Font | Desktop font files. | Windows/macOS font installers |
| .woff / .woff2 | Font | Web font formats; woff2 compresses best. | Browsers |
| .tmp | System | Temporary working file — usually safe to delete when unused. | Varies |
| .bak | System | Backup copy made by an application. | Rename to the original extension |
| .lnk | System | Windows shortcut, not the file itself. | Windows |
| .torrent | Other | Metadata pointing at a peer-to-peer download. | qBittorrent, Transmission |
| .ics | Other | Calendar event or subscription. | Outlook, Apple Calendar, Google Calendar |
| .vcf | Other | Contact card (vCard). | Contacts apps, Outlook |
| .gpx | Other | GPS track or route. | Garmin, Strava, Google Earth |
| .dwg / .dxf | Other | CAD drawings. | AutoCAD, LibreCAD, DraftSight |
| .stl / .obj / .3mf | Other | 3D models for printing or graphics. | Blender, Cura, PrusaSlicer |
If a file will not open, the extension is only a hint — the actual contents decide. Never open an executable attachment you were not expecting.