Landing page readability: does simpler copy really convert better?

Faced with a blank page, the most common instinct is to write "professionally": elaborate sentences, formal vocabulary, slightly stiff phrasing, to sound serious. Often the opposite happens. A study that analyzed real landing pages and their conversion data shows that text readability is a measurable performance factor — and cognitive psychology explains why easy-to-read copy inspires more trust than copy that takes effort to process. Here's what the research says, and how to simplify your copy without making it thin.

What a study of real landing pages shows about readability

In a study published in the journal Entropy, Korniichuk and Boryczka (2021) analyzed a dataset of real landing pages paired with their conversion figures, and trained several machine-learning models to identify which text characteristics best predict conversion. The result: readability metrics — sentence length, vocabulary complexity, sentence structure — rank among the most informative variables for predicting whether a page converts well or poorly, alongside other content factors. In other words, how hard a page is to read isn't a minor style detail; it's a measurable signal correlated with actual page performance.

Why easy-to-read copy inspires more trust

Cognitive psychology has a name for this mechanism: processing fluency. In a landmark review published in Personality and Social Psychology Review, Alter and Oppenheimer (2009) survey dozens of experiments showing that information which is easy to process — visually clear, syntactically simple, familiar — is consistently judged as more true, more familiar, and more trustworthy than equivalent information presented in a harder-to-process form. Conversely, a hard-to-read font, an overly long sentence, or unexplained jargon creates cognitive friction that the brain wrongly attributes to the message itself rather than to its form: readers grow wary without quite knowing why. On a landing page, that transfer works directly against you if the copy demands reading effort at the exact moment a visitor is deciding whether to trust you.

How to assess your copy's readability

You don't need a sophisticated tool to start: read your page out loud. A passage that leaves you gasping for breath or stumbling over its own construction will be read the same way, silently, by a visitor in a hurry. A few concrete markers to spot sentences worth reworking:

• Length: past 20-25 words, a sentence demands a memory effort to hold its meaning until the full stop.
• Stacked clauses: a sentence with more than one nested relative or conditional clause forces a re-read to be understood.
• Abstract words: "optimizing your strategic positioning" reads slower than "sell more, more often."
• Unexplained acronyms and jargon: every term a reader has to decode adds a micro-pause that breaks the flow of reading.

Simplifying without thinning out: concrete levers

Simplifying copy doesn't mean stripping out content — it means removing the obstacles between the reader and that content. In practice:

1. One idea per sentence. If a sentence contains "and" followed by a second conjugated verb, that's often a sign it should be split in two.
2. Active voice over passive. "We ship your order within 48 hours" reads faster and engages more than "Your order is shipped within 48 hours."
3. Concrete words over abstract ones. Replace "solution," "optimize," "leverage" with the precise action verb they usually hide.
4. Bulleted lists for enumerations. Three benefits stacked vertically get scanned in a second; the same three benefits buried in a sentence require a full read.
5. Subheadings that summarize the argument. A visitor scanning the page before reading it should be able to follow the logic just by reading the h2/h3 headings.

What about technical or expert audiences

Simplifying doesn't mean writing to a beginner. A landing page selling a technical SaaS to developers, or specialized coaching to industry experts, can and should keep the precise vocabulary that audience expects — the right technical term reassures an expert reader as much as it loses a novice one. The rule that still holds across the board: the sentence itself should remain easy to follow, even when the vocabulary it uses is specialized. You can write a short, direct sentence with a technical term in it; it's stacked clauses and length that tire readers out, not vocabulary precision on its own.

Where readability matters most on the page

Not all the copy on a landing page carries equal weight. The hero headline and its subheading are read by 100% of visitors, often within a fraction of a second before they decide whether to stay or leave — that's where every unnecessary word costs the most. The call-to-action button label should be understood without effort or ambiguity — "Book my discovery call" rather than "Initiate the engagement process." Our article on the anatomy of a landing page that converts breaks down, section by section, where to prioritize this clarity effort, from the hook down to the FAQ.

Measuring the real effect: test rather than guess

Readability is a likely lever, not an automatic guarantee: context, offer, and audience matter too. The right approach is to simplify one key section — the hero, the offer, or an objection-handling block — then compare the simplified version against the original using the method described in our A/B testing guide, rather than rewriting the entire page at once based on intuition alone.

The 10 LanderKit templates (€89 each, €229 for the full pack) ship with copy already written along these principles — short sentences, scannable structure, unambiguous CTAs — for coaching, ebook sales, or any other use case in the catalog: an already-readable copywriting base you adapt to your offer instead of writing from a blank page.