# 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)


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://documentation.freshpaint.io/reference/faqs/do-event-properties-have-character-limits.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.