File Type Sniff
Guess type by magic bytes (PNG/PDF/ZIP etc.)。 Runs locally—nothing uploaded.
Read file header
No file selected.
Guessed type
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First 64 bytes (hex)
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Guess type by magic bytes (PNG/PDF/ZIP etc.)。 Runs locally—nothing uploaded.
Read file header
No file selected.
Guessed type
—
First 64 bytes (hex)
—