| Extension | Type | Description | Opens With |
|---|---|---|---|
| .jpg | Image | JPEG Image | Photoshop、Preview |
| .png | Image | PNG Image | Preview、Paint |
| .gif | Image | GIF Image | Browser、Preview |
| .webp | Image | WebP Image | Browser、Preview |
| .svg | Image | SVG Vector | Illustrator、Browser |
| .bmp | Image | Bitmap Image | Paint、Preview |
| .tiff | Image | TIFF Image | Photoshop、Preview |
| .ico | Image | Icon File | Resource Editor |
| .heic | Image | HEIC Image | Photos、Preview |
| .raw | Image | RAW Image | Lightroom、Photoshop |
| .mp4 | Video | MP4 Video | VLC、QuickTime |
| .avi | Video | AVI Video | VLC、Media Player |
| .mov | Video | QuickTime Video | QuickTime、VLC |
| .mkv | Video | Matroska Video | VLC |
| .webm | Video | WebM Video | Browser、VLC |
| .flv | Video | Flash Video | VLC |
| .wmv | Video | Windows Media Video | Media Player、VLC |
| .m4v | Video | iTunes Video | iTunes、VLC |
| .mp3 | Audio | MP3 Audio | Windows Media Player、iTunes |
| .wav | Audio | WAV Audio | Audacity、iTunes |
| .flac | Audio | FLAC Audio | VLC、foobar2000 |
| .aac | Audio | AAC Audio | iTunes、VLC |
| .ogg | Audio | OGG Audio | VLC、Winamp |
| .m4a | Audio | AAC Audio | iTunes、VLC |
| .wma | Audio | Windows Media Audio | Media Player |
| Document | PDF Document | Adobe Reader、Preview | |
| .docx | Document | Word Document | Microsoft Word |
| .xlsx | Document | Excel Spreadsheet | Microsoft Excel |
| .pptx | Document | PowerPoint | Microsoft PowerPoint |
| .txt | Document | Plain Text | Notepad、TextEdit |
| .rtf | Document | Rich Text Format | Word、TextEdit |
| .odt | Document | OpenDocument Text | LibreOffice |
| .csv | Document | Comma-Separated Values | Excel、Sheets |
| .epub | Document | eBook | Kindle、iBooks |
| .html | Code | HTML File | Browser、VS Code |
| .css | Code | CSS Stylesheet | VS Code |
| .js | Code | JavaScript | Node.js、Browser |
| .ts | Code | TypeScript | VS Code、Node.js |
| .json | Code | JSON Data | VS Code |
| .py | Code | Python Script | Python |
| .java | Code | Java Source | IntelliJ IDEA |
| .cpp | Code | C++ Source | GCC、VS Code |
| .go | Code | Go Source | Go compiler |
| .rs | Code | Rust Source | Rust compiler |
| .php | Code | PHP Script | PHP |
| .sql | Code | SQL Script | MySQL、PostgreSQL |
| .xml | Code | XML File | VS Code |
| .yaml | Code | YAML File | VS Code |
| .md | Code | Markdown | VS Code |
| .zip | Archive | ZIP Archive | WinZip、7-Zip |
| .rar | Archive | RAR Archive | WinRAR |
| .7z | Archive | 7-Zip Archive | 7-Zip |
| .tar | Archive | TAR Archive | tar command |
| .gz | Archive | Gzip Archive | gzip command |
| .dmg | Archive | Mac Disk Image | macOS |
| .ttf | Font | TrueType Font | Font Manager |
| .otf | Font | OpenType Font | Font Manager |
| .woff | Font | Web Font | Browser |
| .woff2 | Font | Web Font 2.0 | Browser |
| .db | Data | Database File | SQLite Browser |
| .sqlite | Data | SQLite Database | SQLite Browser |
| .xls | Data | Excel 97-2003 | Microsoft Excel |
| .parquet | Data | Parquet Data | Apache Spark |
| .env | Data | Environment Variables | Text Editor |
File Extensions
Common file extensions with their formats, categories, and associated applications. Click any row to copy the extension.
FAQ
Q: What is a file extension?
A: A file extension is a suffix at the end of a filename (e.g. .jpg, .pdf) that identifies the file format and tells the OS which application should open it.
Q: Can I change a file extension?
A: Renaming a file extension changes how the OS interprets it, but does not convert the file's actual format. Use dedicated conversion tools to properly convert between formats.