# Check if jpg is progressive or not

**URL:** <https://forum.kirupa.com/t/check-if-jpg-is-progressive-or-not/53118>\
**Category:** Uncategorized\
**Created:** [May 31, 2004, 4:41pm UTC](https://forum.kirupa.com/t/check-if-jpg-is-progressive-or-not/53118 "2004-05-31T16:41:27Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![gerartje](https://avatars.discourse-cdn.com/v4/letter/g/e19adc/32.png) [@gerartje](https://forum.kirupa.com/u/gerartje)\
**Post date:** [May 31, 2004, 4:41pm UTC](https://forum.kirupa.com/t/check-if-jpg-is-progressive-or-not/53118/1 "2004-05-31T16:41:27Z")

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hello,

Flash only works with non-progressive jpgs,  
i’m making an upload module for images, but how do I check if an jpg is progressive or not??

I know imageInterlace() exists in php, but I’m not that experienced to know if that would work.

tnx