# JPG phenomenon

**URL:** <https://forum.kirupa.com/t/jpg-phenomenon/232512>\
**Category:** random\
**Created:** [July 14, 2007, 10:19pm UTC](https://forum.kirupa.com/t/jpg-phenomenon/232512 "2007-07-14T22:19:33Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![noTime](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/notime/32/2608_2.png) [@noTime](https://forum.kirupa.com/u/noTime)\
**Post date:** [July 14, 2007, 10:19pm UTC](https://forum.kirupa.com/t/jpg-phenomenon/232512/1 "2007-07-14T22:19:33Z")

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I’ve recently encountered this JPG phenomenon: the size of Photoshop and, for example, [Paint.NET](http://Paint.NET) saved JPG file differs a couple dozens of KB where Photoshop’s JPG is higher. I know it contains some additional information such as slices and other stuff I couldn’t identify with HEX editor.

When it comes to smile JPG files, [Paint.NET](http://Paint.NET) compresses JPG file to 1 KB while Photoshop does it not less than 18 KB. Can anybody describe this phenomenon, provide URL to a clever article or name some topic-related Google keywords?

Thanks. 😉