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

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Most frequent questions and answers

You can use the subscription on different bases/accounts. It covers universal access to all of our extensions which extensions can be setup for multiple bases and tables. We explain how many Airtable bases you can use on our pricing page.


On paid plans, there’s no limit on the number of records you can process. Unlike Zapier and Integromat, our pricing is per month, not per record. However, there might be limitations by third party integrations.


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.


We’re not offering discounts at this time. And we don’t require any commitment.


Unfortunately, we only offer plans that provide unlimited access to all of our extensions.


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