Decodes URL parameters (base64 & URL-encoded) and displays them on your pages using simple shortcodes. Perfect for dynamic content passed through URLs

mranderson

Base64 Encoder/Decoder

Enables you to encode parts of your post in base64.

Engagerizer

Tom Mack

<a href="https://wordpress.org/plugins/url-parameter-decoder" rel="ugc">URL Parameter Decoder</a> is a lightweight WordPress plugin that decodes URL parameters (both base64 and URL-encoded) and displays them on your posts / pages using simple shortcodes. Perfect for dynamic content that needs to be passed through URLs while maintaining clean, readable output.
<h4>Key Features</h4>
<ul>
<li>Decodes both base64-encoded and URL-encoded parameters</li>
<li>Creates automatic shortcodes for each parameter you define</li>
<li>Provides fallback default values when parameters aren’t present</li>
<li>Selective activation on specific posts and pages only</li>
<li>Security features to prevent XSS and other injection attacks</li>
<li>Support for displaying both decoded and original parameter values</li>
</ul>
<h3>User Instructions</h3>
Basic Setup
<ol>
<li>Install and activate the plugin</li>
<li>Go to Tools → URL Decoder in your WordPress admin</li>
<li>Add the parameters you want to decode (e.g., “first_name”, “email”, “message”)</li>
<li>Set optional default values for each parameter</li>
<li>Select which posts and pages should process these parameters</li>
<li>Save your settings</li>
</ol>
Using Shortcodes
For each parameter you add (let’s say “first_name”), two shortcodes are automatically created:
<ul>
<li><code>[decode_first_name]</code> – Displays the decoded value</li>
<li><code>[encoded_first_name]</code> – Displays the original encoded value</li>
</ul>
URL Construction Examples
<ul>
<li>Base64 encoded: <code>https://yoursite.com/page/?name=SGVsbG8gV29ybGQh</code></li>
<li>URL encoded: <code>https://yoursite.com/page/?name=Hello%20World</code></li>
<li>Multiple parameters: <code>https://yoursite.com/page/?name=John&email=john%40example.com</code></li>
</ul>
<h3>Use Cases for URL Parameter Decoder</h3>
Direct Mail QR Code Scan (Personalized Mail)
Perfect for direct mail campaigns generated by services like <a href="https://engagerizer.com" rel="nofollow ugc">Engagerizer.com</a>:
<ul>
<li>Personalized Landing Pages: Create a QR code that contains the recipient’s name, account number, or other personal identifiers encoded in base64. When scanned, they land on a page that greets them by name without requiring login.</li>
<li>Tracking Campaign Effectiveness: Include campaign-specific identifiers in the QR code to track which mailings generate the most engagement.</li>
<li>Special Offers: Encode customer-specific discount codes or promotional offers that display automatically when they scan the QR code.</li>
<li>Customer Onboarding: For welcome packages, encode customer information that pre-fills forms when they scan a QR code, reducing friction in the setup process.</li>
<li>Prefill Forms: Prefill your recipient’s information into a subscription form or order form.</li>
</ul>
Zoom Video Conference Chat and other chat platforms
Enhance virtual meeting experiences with encoded URL parameters:
<ul>
<li>Personalized Sales Pages: Create chat links with encoded participant information (first name, last name, avatar image, etc.) that automatically displays when they click the link.</li>
<li>Custom Welcome Messages: Include URL-encoded welcome messages or instructions that display on your landing page.</li>
<li>Role-Based Access: Encode participant roles or permissions that determine what content or features they can access during the meeting.</li>
</ul>
Additional Use Cases
Event Marketing
<ul>
<li>Generate unique QR codes for event tickets with encoded attendee information</li>
<li>Create personalized event agendas based on attendee preferences</li>
</ul>
E-commerce
<ul>
<li>Product recommendations based on encoded purchase history</li>
<li>Personalized landing pages from marketing emails with product details encoded in the URL</li>
</ul>
Membership Sites
<ul>
<li>Simplified login process using encoded member information from email links</li>
<li>Member-specific content that displays based on membership level encoded in URLs</li>
</ul>
Educational Platforms
<ul>
<li>Course-specific content that loads based on student information in the URL</li>
<li>Pre-filled assessment forms with student identifiers passed via encoded parameters</li>
</ul>
These use cases leverage the plugin’s ability to securely pass and decode information through URLs, creating more personalized and streamlined user experiences without sacrificing security.
<h3>Instructions – Engagerizer Users</h3>
<ul>
<li>About <a href="https://engagerizer.com" rel="nofollow ugc">Engagerizer</a>: Engagerizer is the best platform for creating personalized direct mail marketing including personalized QR codes and personalized maps with driving directions from the prospect’s address to the business.</li>
<li>QR Code Variables: All standard and custom variables are available plus the personalized map image and other personalized images you created.</li>
</ul>
<h3>Instructions – ITS Users</h3>
<ul>
<li>About ITS: <a href="https://join.insidethe.show/?utm_medium=affiliate&utm_source=84dc0824" rel="nofollow ugc">Inside The Show</a> is your secret superpower to captivate your virtual audiences. ITS will transform your live virtual sessions into impressive audience experiences.</li>
<li>Bulk Chat Base64 encoded Variables</li>
<li> = Full Name</li>
<li> = First Name</li>
<li> = Avatar image (Zoom avatar url)</li>
<li>Static Variables: Add static variables to identify the secession / training name. For example, the training was called ‘Explosive Sales With Email Marketing’. Your variable would be training=Explosive%20Sales%20With%20Email%20Marketing. I also use static variables for coupon codes and discount percentages. </li>
<li>Displaying the Avatar Image: Using the shortcodes you can display your image with HTML: . You can also enter these shortcodes into any image display function in WordPress (please note – you will not see an image preview).</li>
</ul>
<h3>Troubleshooting</h3>
<ul>
<li>Variables are not displaying on your post / page</li>
<li>Ensure that you selected the WordPress post / page in the settings.</li>
<li>Ensure that you are using the correct short code – copy and paste it from the settings page.</li>
<li>Ensure that your URL is properly structured with the same variable names you have setup. </li>
<li>Use default text to aid in setting up your page. Save the page then reload, the default text should display if no variable data is present.</li>
</ul>
<h3>Support the Plugin</h3>
If you find URL Parameter Decoder useful, please take a moment to <a href="https://wordpress.org/support/plugin/url-parameter-decoder/reviews/" rel="ugc">rate it and leave a review</a>. Your feedback helps improve the plugin and lets others know about its capabilities.
<h4>Why Reviews Matter</h4>
They help other WordPress users discover useful plugins 
They provide valuable feedback on what works and what could be improved 
They motivate continued development and support of the plugin
Thank you for using URL Parameter Decoder!

URL Parameter Decoder


We used this plugin for our personalized direct mail campaign to decode the personalized QR codes. Easy to use.


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