Copy Lab
Test your headline against your buyers before you ship it.
Write up to 4 new versions of your hero (headline, subline and call to action), or get suggestions, and put them in front of the same panel that reviewed your page. See which version each persona picks and why, without a deploy or an A/B test.
Free while in beta. No credit card required.
Example with made-up data.
Most pages don't have the traffic to A/B test copy
- A reliable A/B test on a landing page often needs weeks of traffic, and it answers one question.
- So headline decisions are made in a meeting, by whoever argues best.
- Rewrites ship without anyone checking whether they're clearer to the buyer.
How a test works
- 01
Start from your current hero
Copy Lab pulls the headline, subline and CTA from your page. Edit them if they're wrong.
- 02
Add versions
Write your own, use the suggested hero from the review, or generate 3 alternatives aimed at the positioning questions your page misses.
- 03
The panel reads them all
Each persona reads every version, in a different order to even out position bias, and stays in character from their interview.
- 04
See the picks
Picks, clarity and appeal per version, the predicted winner, and who each version wins and loses with.
What you get
Picks per persona
Not just a winner: see that the skeptic prefers version B while the budget holder prefers A, and why.
Clarity and appeal
Two 0–100 scores per version, averaged across the panel.
No credits used
Copy Lab tests don't use credits, so you can iterate freely.
Good to know
- Results are directional. Use Copy Lab to pick what's worth an A/B test, not to replace one.
- Copy Lab tests the hero: headline, subline and primary CTA.
Questions, answered.
- Do I need a finished review first?
- Yes. Copy Lab uses the panel from a finished review, so the personas already know your page.
- How many tests can I run?
- Up to 20 a day per person.
Further reading
- How to A/B test a landing page with low trafficMost landing pages don't have the traffic for reliable A/B tests on small changes. Here's how to test anyway: bigger changes, better metrics, longer tests, and faster ways to decide what to test.
- Call to action examples: 30 CTAs that say what happens nextCall to action examples for landing pages, grouped by goal: trials, demos, sign-ups, downloads and purchases. Plus how to write and place a CTA that gets clicked.
- Landing page copywriting frameworks: PAS, AIDA, BAB and when they failHow to use PAS, AIDA, Before-After-Bridge and the 4 Ps to structure landing page copy, with a short example of each and the mistakes that make framework copy sound generic.
Related features
Persona feedback
Five simulated buyers read your landing page, score it on the same rubric and tell you what's missing. Get a ranked fix list in minutes.
Learn moreMessage match
Paste the ad, keyword or email that sends visitors to your page. Klar checks whether the landing page keeps its promise, and rewrites the message to fit.
Learn moreCompetitor comparison
Your persona panel reads up to 3 competitor landing pages and says where they'd sign up, why, and what would win them back, with patterns worth borrowing.
Learn more
See your page through your buyers' eyes.
Paste your URL. Five buyer personas read it and tell you what to fix first. Free while in beta.