Filename extension
What is extension in filename?
A filename extension is the suffix added to the name of a file to indicate its type. It's typically a group of characters preceded by a dot (.) at the end of a file name. File extensions help operating systems and users determine which application to use to open or run the file.
There are Eight Types Common File Extensions by Category.
1️⃣ Document Files
.doc / .docx: Microsoft Word Document .pdf: Portable Document Format .txt: Plain Text File .xls / .xlsx: Microsoft Excel Spreadsheet .ppt / .pptx: Microsoft PowerPoint Presentation .odt: OpenDocument Text (OpenOffice/LibreOffice)
2️⃣ Image Files
.jpg / .jpeg: JPEG Image .png: Portable Network Graphics .gif: Graphics Interchange Format .bmp: Bitmap Image .svg: Scalable Vector Graphics
3️⃣ Audio Files
.mp3: MP3 Audio .wav: Waveform Audio .flac: Free Lossless Audio Codec .aac: Advanced Audio Coding .ogg: Ogg Vorbis Audio
4️⃣ Video Files
.mp4: MPEG-4 Video .avi: Audio Video Interleave .mkv: Matroska Video .mov: QuickTime Movie .wmv: Windows Media Video
5️⃣ Compressed/Archive Files
.zip: ZIP Compressed Archive .rar: RAR Compressed Archive .7z: 7-Zip Compressed Archive .tar: TAR Archive (often used in Linux/Unix systems) .gz: GZIP Compressed Archive
6️⃣ Executable/Program Files
.exe: Executable File (Windows) .bat: Batch File (Windows) .msi: Microsoft Installer Package .apk: Android Package .sh: Shell Script (Unix/Linux)
7️⃣ Code/Programming Files
.html / .htm: HTML File (Web Page) .css: Cascading Style Sheet .js: JavaScript File .php: PHP Script .java: Java Source File .py: Python Script .cpp: C++ Source File .cs: C# Source File
8️⃣ System Files
.dll: Dynamic Link Library (Windows) .sys: System File (Windows) .iso: Disc Image File
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