: What's the maximum file size of a jpg image? I'm attempting to ascertain the maximum file size possible of a jpg to detect when someone has hidden additional data (viruses etc) within it. Assuming

@LarsenBagley460

Assuming that no compression has been applied to the file, there are 307,200 pixels, which is a 0.3MP. Handy look up table

If each pixel contains 24 bits of information for Red green and blue, then


307,200 * 24 = 7,372,800 bits of information
Divide by the 8 bits to become a byte value
7,372,800 / 8 = 921,600 bytes (Or 0.9 Mb)


I hope my Saturday night reasoning is intact, but the good mathematicians and computer scientists may well correct me.

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