FILE INSPECTION
MIME Type Checker
Inspect a file locally to compare its browser-reported MIME type, filename extension, and detected file signature.
✓ Se ejecuta en tu navegador
✓ File stays on your device
✓ No sign-up
01 · INPUT
LOCAL
Inspect a file
Drop your file here
or click to choose any file from your device
Browse file
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Elige un archivo para empezar.
Local-only inspection
No upload request is made. The checker reads only the selected file inside this browser tab.
02 · RESULT
Nothing inspected yet
File inspection
{ }
Nothing inspected yet
Choose a file above to see the browser MIME type, extension hint, detected signature, and header bytes.
Header bytes
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No known signature found in the file header.
01
Browser-reported type
The MIME value exposed by the File API. Some browsers may leave it empty for unfamiliar files.
02
Filename extension
A hint from the file name. An extension alone does not prove what the file contains.
03
Binary signature
Known header bytes are checked locally to identify common file formats more reliably than the extension alone.