MIME Type Detector
Detect MIME type from file content or magic bytes with confidence scoring and developer-friendly output. Free MIME type detector by Graph Tools.
Use this free MIME type detector to identify a file type from its content or magic bytes rather than just its extension. Upload a file or paste a hex prefix and the tool returns the detected MIME type, a confidence score, and the matching magic byte signature. Useful for developers validating file upload Content-Type headers, security engineers detecting disguised file types, and backend engineers building file handling pipelines.