# Cleaning up contact properties

**URL:** <https://community.hubspot.com/t/cleaning-up-contact-properties/12828>\
**Category:** APIs & Integrations\
**Tags:** contacts\
**Created:** [February 6, 2019, 7:08pm UTC](https://community.hubspot.com/t/cleaning-up-contact-properties/12828 "2019-02-06T19:08:36Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![bdesilva](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/bdesilva/32/28756_2.png) [@bdesilva](https://community.hubspot.com/u/bdesilva)\
**Post date:** [February 6, 2019, 7:08pm UTC](https://community.hubspot.com/t/cleaning-up-contact-properties/12828/1 "2019-02-06T19:08:36Z")

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We have many custom properties that I’d like to get rid of. I can pull all my contact properties pretty easily but I cannot ID for sure which are custom and which are Hubspot created/default. Please advise which contact property will tell me.

Thanks.

Bryan

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**Author:** ![hot\_z](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/hot_z/32/86357_2.png) [@hot\_z](https://community.hubspot.com/u/hot_z)\
**Post date:** [February 7, 2019, 7:54am UTC](https://community.hubspot.com/t/cleaning-up-contact-properties/12828/2 "2019-02-07T07:54:51Z")

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Hi,

As an example, if you’re pulling all of the contact properties([https://developers.hubspot.com/docs/methods/contacts/v2/get\_contacts\_properties](https://developers.hubspot.com/docs/methods/contacts/v2/get_contacts_properties)) in a portal, there returned JSON should have a field called “hubspotDefined”. Typically, it is set to null if it is a custom created property. If it is a HubSpot default property, we should see HubSpot as its value.

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**Author:** ![IsaacTakushi](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/isaactakushi/32/70387_2.png) [@IsaacTakushi](https://community.hubspot.com/u/IsaacTakushi)\
**Post date:** [February 7, 2019, 8:20pm UTC](https://community.hubspot.com/t/cleaning-up-contact-properties/12828/3 "2019-02-07T20:20:00Z")

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Nice solution, [@hot\_z](https://community.hubspot.com/t5/user/viewprofilepage/user-id/84980).

@bdesilva, if you’re ever not sure about a property, you can also consult [this resource](https://knowledge.hubspot.com/articles/kcs_article/contacts/hubspots-default-contact-properties), which lists all default contact properties.

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**Author:** ![bdesilva](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/bdesilva/32/28756_2.png) [@bdesilva](https://community.hubspot.com/u/bdesilva)\
**Post date:** [February 7, 2019, 8:21pm UTC](https://community.hubspot.com/t/cleaning-up-contact-properties/12828/4 "2019-02-07T20:21:10Z")

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Thanks. Found it!