📌 Introduction
File extensions are an important part of computer awareness and are frequently asked in exams like SSC, Banking, Railway, UPSC, and Computer Operator. A file extension indicates the type and format of a file.
In this post, you will learn the most important file extensions and their uses
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💻 What is a File Extension?
A file extension is a suffix added to the file name after a dot (.) that tells the operating system about the file type.
👉 Example:
document.pdf→.pdfis the file extensionimage.jpg→.jpgis the file extension
📂 Important File Extensions List
📝 Document File Extensions
.txt – Text File
.doc – Microsoft Word Document
.docx – Word Document (New Version)
.pdf – Portable Document Format
.rtf – Rich Text Format
.odt – Open Document Text
.xls – Excel Spreadsheet
.xlsx – Excel (New Version)
.ppt – PowerPoint Presentation
.pptx – PowerPoint (New Version)
🖼️ Image File Extensions
.jpg / .jpeg – Joint Photographic Experts Group
.png – Portable Network Graphics
.gif – Graphics Interchange Format
.bmp – Bitmap Image
.tiff – Tagged Image File Format
.svg – Scalable Vector Graphics
🎵 Audio File Extensions
.mp3 (mpeg3) – Moving Picture Experts Group 3
.wav – Waveform Audio
.aac – Advanced Audio Coding
.wma – Windows Media Audio
🎬 Video File Extensions
.mp4 (mpeg4) – Moving Picture Experts Group 4
.avi – Audio Video Interleave
.mkv – Matroska Video
.mov – Apple QuickTime Movie
.wmv – Windows Media Video
📦 Compressed File Extensions
.zip – Compressed File (Zone Improvement Plan)
.rar – WinRAR Archive
.7z – 7-Zip Archive
.tar – Tape Archive
.gz – Gzip File
⚙️ System & Executable Files
.exe – Executable File
.dll – Dynamic Link Library
.bat – Batch File
.sys – System File
.msi – Microsoft Installer
🌐 Web & Programming Files
.html – Hyper Text Markup Language
.css – Cascading Style Sheets
.js – JavaScript File
.php – PHP Script
.xml – Extensible Markup Language
.json – JavaScript Object Notation
💾 Database & Other Files
.db – Database File
.sql – Structured Query Language File
.mdb – Microsoft Access Database
.accdb – Access Database (New)
.iso – Disk Image File
📱 Miscellaneous Extensions
.apk – Android Application Package
.ipa – iOS App File
.log – Log File
.tmp – Temporary File
🎯 Conclusion
These important file extensions are frequently asked in competitive exams. Understanding them will help you improve your computer knowledge and exam performance.
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