Use Custom CSS to style your form

You can use your own CSS for styling forms. To start, go to the Design section of your web form and scroll to the bottom, where Add custom CSS button is available.

Add custom CSS

Click on Add custom CSS and use the Code tab to type the CSS code or the URL tab to provide the URL to the CSS file located on your server.

Custom CSS

If you choose to Load CSS from URL, make sure that the URL leads to the content of your stylesheets. Here’s an example: If the URL does not contain the .css extension at the end, your CSS styles will not apply to the form.

For even more examples, visit the CSS Tricks section of our Knowledge Base.


    1. Hello Adrian,
      You can add custom CSS to your form prior to the Match site action. Connecting on our 123FormBuilder platfom allows you to enter the code in a specific field. If you have any other questions please contact us at and we will gladly help.

  1. Dear Sir or Madam, My user name is nicky_r. I cannot find the Custom CSS option you mention above. I am using your App for Wix. N Rayne

    1. Hello!

      I apologize for replying late. Our customer support service works best when contacting us at or by using the live chat widget during weekly working hours.

      Regarding your issue, the Custom CSS section of your form is located under the Customize section of your theme. In the 123FormBuilder App on Wix, go to DesignSelect a theme and click your theme (link on the right). Now, hit the Customize link that is located under Demo Preview. A window will popup on screen where you can customize your theme. The custom CSS link is located on top. If you are using a predefined theme, you’ll need to press Ok to duplicate it when asked.

      We have applied a small redesign to the interface of the 123FormBuilder app, so we’re open to any type of suggestions at


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Frequently Asked Questions

Here is a list of the most frequently asked questions. For more FAQs, please browse through the  FAQs page.

Is this service free?
Yes, we offer a free form builder service. Just sign up to the Basic plan and you are all set. This plan is forever free, but you are limited with a few features only, such as 5 forms per account, 100 submissions per month and you have to keep the backlink to 123FormBuilder on your forms. Check out our features matrix for more information.
How many forms can I create?
It depends on the service plan you are on. Higher service plans enable more features, including more web forms for your account. If you need more forms, go to the My Account section of your account and click the upgrade button. To create an unlimited number of forms, either upgrade to the Platinum service plan or higher. Consult our features matrix for more information.
How can I publish my forms?
You can publish your forms in many ways, by using their direct URL or HTML link, embedding them with a JavaScript code, Inline HTML or iFrame, using the Facebook app or the WordPress plugin, using popups, the Blogger code snippet and many more. Once you have created and customized your form, go to the Publish section to complete your work. Read more in our documentation.
How do I change my form design?
You can change the design of your form for more information. in the Themes section, which is located in your form settings. We offer a set of more than 30 predefined form themes for your forms, but you can also create your own from scratch. You can customize the submit button, the logo and more. To apply your own stylesheets, all forms come with a custom CSS editor.

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