Enforce unique field values in miniExtensions form

This feature enforces uniqueness for a field value in miniExtensions form. For example, if you would like to disallow a registered user from signing up again, this extension will prevent having duplicated records.

In miniExtensions form, you have the option to set a field settings to require uniqueness. In which case, the field input value will be validated. If the new value does not exist already, the record will be created/updated. If it does exist, an error message will show to the user and the form will not get submitted.


  • Supported for the following field types: Single Line Text, URL, Email, Barcode, and Numbers.
  • Customizable error message when a duplicate record is found.

Use Cases

This extension can be useful in a lot of scenarios. You can use it to:

  • Prevent users from registering twice
  • Validate entries and stop duplicates


Here’s an example of a form that prevents you from using an existing username.

1. URL

2. Embed on your site

The form can be both shared as a URL or embedded in your website.

If you click on the sample view below, you’ll see the table that’s used for the demo above.


Last Updated

Supported features

Third Party Integration

Comments are closed.


Most frequent questions and answers

There is no limit on how many bases you can install miniExtensions on. Learn more


We offer limited and unlimited plans. To learn more about how our limits work, see this article.


We have instructional videos for how to use each one of our extensions on the product page. They guide you step-by-step of how to set them up.


Yes! A 20% discount is available for annual plans.


Yes! Please apply for a discount here.


Submit your request here and we will get back to you as soon as we can.


New Releases