FileType Checker

Ever downloaded a file and wondered if it's really what it claims to be? FileType Checker uses AI to look inside your files and tell you what they actually are — no guessing, no sketchy uploads. Just drop a file into the popup and get an instant verdict: does the content match the extension, or is something off? Great for spotting renamed files, suspicious downloads, or just satisfying your curiosity. Powered by Google's Magika AI model, FileType Checker can identify 200+ file types — from PDFs and images to source code, archives, executables, and more. It checks the actual bytes of your file, not just the name. The best part? Everything runs locally in your browser. Your files never leave your machine. No servers, no uploads, no internet required. 100% offline, 100% private. Key features: 🔍 AI-powered content detection for 200+ file types 🛡️ Flags mismatches between file extensions and actual content 📁 Simple drag-and-drop or click-to-browse interface 🔒 Fully offline — your files stay on your device ⚡ Fast analysis with no external dependencies