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About This Site
File-Extension.com is a free resource to help you understand and work with different file formats. We provide clear, practical guides on how to open, edit, and convert files across all major operating systems.
Every guide includes step-by-step instructions, recommended software (free options always listed first), and troubleshooting tips for common problems.
🛠️ Free File Tools
Use our free online tools to work with your files - 100% private, everything runs in your browser!
🔍 File Header Analyzer
Identify any file by analyzing its magic bytes - works even without extension. Supports 70+ formats.
🖼️ Image Compressor
Compress and resize images up to 90%. Convert between JPG, PNG, and WebP formats instantly.
📄 File Extension Checker
Upload any file to instantly identify its extension, type, and how to open it.