Documentation on how to apply custom themes to Umbraco Forms

Umbraco Forms supports Themes, allowing forms to be customized in a much simpler manner.

Creating a Theme

To create a theme, you need to create a folder at /Views/Partials/Forms/Themes/. The name of the folder is the name of theme that will be visible in the backoffice when choosing it.

Copy the explicit files you wish to override in your theme, it may be a single file or all files from the default theme folder. Make the necessary changes you desire to CSS class names, markup etc.

Obtaining the Default Theme Files

For Umbraco 9 and previous, it's straightforward to copy the files you need from the default theme folder. We highly recommend that you never customize any files found in the default themes folder. There is a risk that any customizations to these files will be lost with any future upgrades you do to Umbraco Forms.

Umbraco 10+ distributes these files as part of a Razor class library, so you won't find them on disk. Instead you should download the appropriate zip file for your Forms version and extract the ones you need.

You can obtain the latest versions of the default theme for each Forms major version from the following links:

If you are using a lower minor version of Forms than those listed, you should download an older version of the default theme.

The default theme for minor versions are available from the "Source Code" tab available at the bottom of Umbraco Forms Package page. Only versions where changes were made are available.

You should use the theme available for the highest version that's less or equal to the version of Forms you have installed.

For example, when using Umbraco Forms 10.4, and no file for that version is available use version 10.3 instead.

Amending Theme Files

Umbraco Forms conditional JavaScript logic depends on some CSS classes currently and it is advised that you add any additional classes you require but do not remove those already being set.

If adding or amending client-side scripts, you need to copy the Script.cshtml file from the default themes folder. In your copy, amend the .js references to reference your own script files.

Using a Theme

To use a theme with a Form use the "Insert Form" macro where you will be presented with the options of the form you wish to insert along with an option to pick a theme. This displays the list of theme folders found at Views/Partials/Forms/Themes.

Choosing and using a theme

When you are rendering your form directly in your template, you need to specify your theme by filling out the FormTheme attribute:

@await Umbraco.RenderMacroAsync("renderUmbracoForm", new {FormGuid="1ec026cb-d4d3-496c-b8e8-90e0758c78d8", FormTheme="MyFormTheme", ExcludeScripts="0"})

If you do not pick and/or set a theme, the default theme will be used to render the form.

Theme Fallbacks

When using a theme, Umbraco Forms will try to use a view from the theme folder, but then fallback to the same view in the default theme folder if it can't be found. This allows you to create a theme by only modifying the files necessary to make your customizations.

Files which can be overridden:

  • Render.cshtml (overrides the entire form - usually not needed)

  • Form.cshtml (overrides the generation of the fields on the current page)

  • Script.cshtml (overrides the way files are included with the form)

  • /Fieldtypes/FieldType.*.cshtml (overrides a specific view for a field)

Helper Methods


Sets the primary form theme stylesheet path. This overrides an already assigned stylesheet and will be rendered out when inserting the form into the page

Html.SetFormThemeCssFile(Model, "~/App_Plugins/UmbracoForms/Assets/Themes/Default/style.css")


Add a JavaScript file path to include on form render



Adds a class to the form field HTML element of a given type. If no type is given, it will add the class to all fields

// Applies the CSS class 'form-control' to all fields that GetFormFieldClass uses in FieldType views

// Applies the CSS class 'some-other-class' for the FieldType of the name 'Password'
@Html.SetFormFieldClass("some-other-class", "Password")


Retrieves all classes for a given field type, used when rendering form fieldtype partial views



Adds a class to the div element wrapping around form fields of a given type. If no type is given, it will add the class to all fields

// Applies the CSS class 'form-group' around all fields, labels & help texts

// Applies the CSS class 'some-other-class' for the FieldType of the name 'Password'
@Html.SetFormFieldWrapperClass("some-other-class", "Password")


Retrieves all wrapper classes for a given field type, used when rendering form fields. This class wraps both label, help-text and the field itself in the default view


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