If you’ve ever wondered whether your form could convert better with a shorter layout, a different CTA, or a multi-step flow, you’re asking the right question. Small changes to labels, field order, or copy can make a big difference. But it’s tough to guess what to change without testing! That’s where a/b testing (also called split testing) WordPress forms come in handy.
The goal of this review is to show you approachable tools (many with free tiers) that you can use to A/B test your WordPress forms, even if you’ve never set up an a/b test in your life. You’ll learn a quick, repeatable workflow that pairs perfectly with Ninja Forms, plus specific tool recommendations with pros/cons so you can pick the best fit.
The basics of running a split test
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Define the goal. For forms, it’s generally going to be form submission. You want more people submitting your forms, so you’re optimizing for form submissions. Which variant of a form will lead to more people submitting it?
- Define the question. What are you curious about? What do you want to test out?
- Maybe your form is pretty long; will more people stick with it and submit if it’s a multi step form?
- Maybe you’re wondering about your call to action on the submit button; will one phrase work better than the other?
- Does turning that checkbox list field into an image select field to give a visual of the selection lead to more being selected?
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Create Version A and Version B.
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In Ninja Forms, Duplicate your form (Form A and Form B). Change one thing on one form. ONE THING! It can be tempting to change a few things at once. But then you won’t know which change led to any variance you see.
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Publish each variant on a page or section the test tool can rotate between.
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Set up the test and the conversion.
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In tools that support it (see below), set the conversion to “form submission” (Ninja Forms supported in several tools).
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Otherwise, set the conversion to “visit Thank You page.”
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Run until you have enough data. Let the tool split traffic 50/50 and watch results. Most tools will call a winner when there’s enough data by their standard, but you can usually set your own thresholds.
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Go with the winner. Replace the original with the winning variant, then consider a new test (CTA color, microcopy, required/optional fields, or a multi-step vs single-step version).
Recommended tools (free & premium) for A/B testing WordPress forms
1. Nelio A/B Testing
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Why it’s great: Native WordPress plugin; tracks form submissions directly (including Ninja Forms) as a conversion action. Offers heatmaps, click tracking, and more. The free version is ideal for low-traffic sites; premium unlocks higher limits and more test types.
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How to use it for forms: Put Form A on Variant A and Form B on Variant B, then set the conversion to the submission of either form (or your Thank-You page).
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Pricing: Free version on WordPress.org (gated by monthly site visitor volume); paid plans available for higher traffic.
2. Split Test for Elementor
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Why it’s great: If your Ninja Forms live in an Elementor environment, this plugin lets you split test sections/widgets and even whole pages right in the editor. No external service required.
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How to use it for forms: Place Form A and Form B in separate Elementor sections; the plugin rotates them.
- Pricing: free WordPress.org plugin
3. My WP A/B Testing
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Why it’s great: A lightweight, Gutenberg-native way to A/B test block content.
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How to use it for forms: Add Ninja Forms (via block or shortcode) as Variant A and B inside the test block; use your Thank-You page as the conversion.
- Pricing: free WordPress.org plugin
4. AB Split Test
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Why it’s great: Designed to swap pages/blocks/elements across popular builders (Elementor, Beaver Builder, etc.) with simple goal setup that includes form submissions or sign-ups.
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How to use it for forms: Point goals to a submit or Thank-You page; let it auto-pick the winner when significant.
- Pricing: free and premium tiers
5. Split Hero
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Why it’s great: Built specifically for WordPress pages/landing pages; great for freelancers and agencies who want a clean, hosted dashboard.
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How to use it for forms: Put Form A on Page A and Form B on Page B; define the conversion (pageview or event) and run. Trial makes it easy to try without commitment.
- Pricing: premium with a 14-day free trial
6. Divi Leads
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Why it’s great: Split testing is built into Divi’s visual builder.
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How to use it for forms: Drop Form A vs B inside your Divi layout and run a test on that module/row/section. Track submissions or use Thank-You page.
- Pricing: included with Divi
7. Convert Experiences
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Why it’s great: Great visual editor and diverse targeting options; basically makes any modifications you want to test point and click. Plus a WP plugin available for making installation easy.
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How to use it for forms: Use the plugin to install Convert; create visual edits to your form or rotate Form A/B versions and track submissions/goal page.
- Pricing: premium; there’s a free plugin but it only acts as an installer for the main software.
8. VWO
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Why it’s great: VWO is a full blown experimentation suite with just about everything under the sun you could want for testing: behavior analytics with heatmaps and session replays, personalization options, the whole 9 yards. They offer a free plan that’s positioned as a Google Optimize-like experience (rest in peace, Optimize) if you’re below 50k monthly visitors.
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How to use it for forms: Use the visual editor to change form elements on the page or serve Form A/B and track submits/thank-you.
- Pricing: free if below 50k monthly visitors, on up to enterprise tier packages (find it all here, note the slider)
At-a-glance comparison
| Tool | Free option | Tracks form submits | Best for |
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| Nelio A/B Testing | Yes (low-traffic) | Yes (incl. Ninja Forms) | Easiest all-around |
| Split Test for Elementor | Yes | Indirect (use Thank-You) | Elementor users |
| My WP A/B Testing | Yes | Indirect (use Thank-You) | Block editor (Gutenberg) |
| AB Split Test | Yes (free) | Yes/Indirect (goals) | Page-builder flexibility |
| Split Hero | Trial (14-day) | Yes/Indirect | Fast SaaS page tests |
| Divi Leads | No (in Divi) | Yes/Indirect | Divi users |
| Convert Experiences | Trial; premium | Yes | Higher-end features |
| VWO | Yes (free plan) | Yes | General web testing |
Wrap-up (and your next step)
A/B testing doesn’t have to be intimidating. With one of the simple options above—and a repeatable workflow—you can confidently answer “which form works better?” and keep improving over time.
Start by duplicating your current Ninja Form, change one thing, and use a free tool like Nelio or a builder-specific option to split the traffic. When you’re ready, keep iterating with multi-step layouts, conditional logic, and layout tweaks to squeeze out even more wins.
Get Ninja Forms free to build and duplicate your test variants quickly, and explore add-ons like Conditional Logic, Layouts & Styles, and Multi-Step Forms to power smarter experiments. Tune your form into a conversion engine!
