doublesharp

<h4>Validated Field Add-On</h4>
<p>The <strong>Validated Field</strong> add-on for <a href="https://wordpress.org/extend/plugins/advanced-custom-fields/" rel="ugc">Advanced Custom Fields</a><br />
provides a wrapper for other input types which allows you to provide client side input masking using the jQuery<br />
<a href="http://digitalbush.com/projects/masked-input-plugin/" rel="nofollow ugc">Masked Input Plugin</a>, server side validation using either PHP regular expressions<br />
or PHP code, the option of ensuring a field’s uniqueness for all posts by <code>post_type</code> and <code>meta_key</code>, <code>post_type</code>, or site wide, or a<br />
single post by meta_key, as well as marking a field as read-only. Edit your fields in the ACF Field Group editor and update code using the ACE.js<br />
IDE with autocomplete and syntax validation.</p>
<h4>Features</h4>
<ol>
<li><strong>Input Masking</strong> – easily set masks on text inputs to ensure data is properly formatted.</li>
<li><strong>Server-Side Validation</strong> – validate the inputs using server side PHP code or regular expressions.</li>
<li><strong>Uniqueness</strong> – ensure that the value being updated is not already in use.</li>
<li><strong>Repeater Fields</strong> – validated fields within a <a href="http://www.advancedcustomfields.com/add-ons/repeater-field/" rel="nofollow ugc">Repeater Field</a>.</li>
<li><strong>Read Only</strong> – specify a field as read-only allowing it to be displayed but not updated.</li>
<li><strong>WordPress Multi Language</strong> – compatible with multilingual sites using the WPML plugin.</li>
<li><strong>Conditional Logic</strong> – show and hide validated fields based on the values of other “switch” fields.</li>
</ol>
<h4>Compatibility</h4>
<p>Requires <a href="https://wordpress.org/extend/plugins/advanced-custom-fields/" rel="ugc">Advanced Custom Fields</a> version 4.0 or greater.</p>


Advanced Custom Fields: Validated Field

Adding my one star to inform people that this plugin is no longer working

Doesn't work in ACF Pro 5.6.2

The Validated Field add-on for Advanced Custom Fields provides input masking and server-side validation of other field types.

anilpeter75

<p>This plugin adds a “JSON Formatter” tool under the Tools menu in your WordPress admin. It allows you to quickly paste unformatted JSON, click a button, and get beautified, validated output without leaving your site.</p>
<p>For more information or to use the original web-based tool, please visit the <a href="https://formatjsononline.com/" rel="nofollow ugc">official website</a>.</p>


Format JSON Online

A simple tool to format and validate JSON online within your WordPress admin.

Advanced Custom Fields: Validated Field vs Format JSON Online