# Do event properties have character limits?

Yes, any given event property has a maximum character length of 255 characters and a total size limit of 1MB. 

When a URL is 255+ characters long and contains attribution parameters, Freshpaint's code automatically extracts and appends the following attribution parameters to the final payload sent to destinations:

UTM Parameters (Always extracted):

* utm\_source
* utm\_medium
* utm\_campaign
* utm\_content
* utm\_term

Click ID Parameters (Destination-specific):

* $gclid - Google Click ID (Google Ads, Floodlight, Google AdWords)
* $gclid\_creation\_time - GCLID timestamp
* $fbclid - Facebook Click ID (Facebook destinations)
* $fbclid\_creation\_time - Facebook Click ID timestamp
* $msclkid - Microsoft Click ID (Bing Ads)
* $ttclid - TikTok Click ID (TikTok Ads)
* $dclid - DoubleClick ID (Floodlight)
* $auiddc - Audience ID (Google CM360)
* $gbraid - Google BRAID (Google destinations)
* $sapid - StackAdapt ID (StackAdapt)
* $ttdimp - TheTradeDesk Impression ID (TheTradeDesk)
* $cntr\_auctionId - Basis Click ID (Basis)
* $edimpid - Google CM360 Impression ID (CM360)