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New feature release: Configure headline testing in the Parse.ly WordPress plugin

We’re excited to announce that you can now inject and configure the required JavaScript snippet for Parse.ly Headline Testing directly from your WordPress Admin area. This update to the Parse.ly Plugin helps your team set up and manage headline testing without manually injecting scripts.

This functionality is available beginning with version 3.21.0 of the plugin.

Why it matters

Until now, setting up Parse.ly Headline Testing required manually inserting JavaScript snippets. This new update removes that friction—helping teams experiment faster, learn what resonates with readers, and continuously improve engagement with less setup time.

Whether your site publishes breaking news or evergreen content, Headline Testing helps your editors make data-driven decisions that boost performance.

What’s included

  • Headline Testing Configuration: Enable or disable Parse.ly Headline Testing directly in your WordPress Admin.
  • One-line Script Injection: Automatically adds the Parse.ly Headline Testing script (https://experiments.parsely.com/vip-experiments.js)—no manual code required.
  • Advanced Installation Option: Inline headline testing logic for developers who need deeper control.
  • Flicker Control: Reduce visual flicker when swapping headlines (available with Advanced Installation).
  • Live Updates: Automatically refresh headline variations on infinite-scroll or dynamically loaded pages.
  • Granular Settings: Adjust Live Update Timeout and control behavior after page load.

For now, experiments themselves still need to be created and managed directly from the Parse.ly Dashboard. We’re actively exploring ways to bring full experiment management directly into WordPress in a future update.

Get started

To configure Headline Testing:

  1. In your WordPress Admin sidebar, go to Parse.ly → Settings.
  2. Select the Headline Testing tab.
  3. Choose your preferred installation method and configuration options.
  4. Click Save Changes

For best results, use the One-line Snippet method unless your site uses custom caching or rendering logic. Visit your homepage’s source code to confirm the headline testing script is injected correctly.

For detailed documentation, see the Parse.ly Plugin Headline Testing Documentation.

Last updated: October 13, 2025