Upload any file and check what it really contains, not just what its extension says. The detector analyzes the file content on the server and returns the content label, MIME type, confidence score, likely extensions, browser MIME, server MIME, SHA-256 hash and a safe preview of the first bytes. Use it to debug upload validation, inspect files with misleading names, compare MIME values or quickly review suspicious attachments without installing desktop tools.
✓The detector analyzes file content, so it can catch cases where the extension and the real format do not match.
✓Detection confidence is shown as a percentage, with a warning when the result should be reviewed manually.
✓The report compares browser MIME, server MIME and detected MIME so upload bugs are easier to diagnose.
✓SHA-256 helps identify the exact file and compare it with other reports without opening the file again.
✓The first bytes and text preview make common file signatures and plain-text content visible in a controlled way.
✓The file is analyzed from the temporary upload request and is not added to the user file list.
