How to sound less formal in AI writing

You paste your AI draft into a doc. The facts are right. The structure is clean. But it reads like a corporate press release.

Too many formal words. Too many transition phrases. Every sentence lands with the same weight. Nothing breathes.

This is the default AI voice. It's not broken. It's just boring.

The good news: you can fix it without rewriting the whole thing. Small, targeted edits to rhythm, word choice, and structure make an AI draft read like it came from a human. Here are seven techniques that actually work.

Why AI writing sounds formal (and why it matters)

AI models are trained to be correct. Correct grammar. Correct structure. Correct tone. The problem is that human writing is rarely correct in the textbook sense. Real people write in fragments. They repeat themselves. They trail off and pick back up.

Wikipedia's editors catalogued this in their Signs of AI Writing guide. They found that AI text follows predictable patterns: uniform sentence length, overuse of academic-sounding connectors, and a tendency to sound like it's building toward a TED Talk reveal. Every single time.

Readers notice this. Even if they can't name what's wrong, they feel it. The text scans as "off" and they disengage.

For content creators, founders, and anyone publishing under their name, this matters. If your writing sounds like everyone else's AI output, readers stop trusting it. They stop reading entirely.

Break up uniform sentence rhythm

AI writing tends to produce sentences of roughly equal length. Ten to fifteen words. Same cadence. Same structure. Subject, verb, object. Repeat.

Real writing does not move like that. It stretches. It contracts. Short sentences hit harder after long ones. A one-word sentence lands like a punch.

Here is a simple test: scan your draft and look at the right margin. If every line ends at roughly the same place, your rhythm is too uniform. Break it up.

Try combining two short sentences with a comma. Then follow with a one-line paragraph that stands alone. The variation in pacing tells the reader's brain: a person wrote this.

Read your paragraph aloud. If you're out of breath halfway through, split it. If every sentence takes the same number of syllables to finish, break one in half or triple its length. The goal is variety, not symmetry.

Replace formal transition words with natural ones

AI loves academic connectors. Words that end in "more" or "less." Multi-syllable transitions that would feel at home in a legal brief. These markers scream "I was written by a language model trained on research papers."

Real people do not talk like that. They say "also," "but," "so," and "and." The simplest transitions are usually the best ones.

Here is a quick swap list. Replace these formal transitions with their natural alternatives:

"In addition" becomes "Plus" or "And." "However" becomes "But" at the start of a sentence. Yes, you can start a sentence with "but." "Therefore" becomes "So." Academic transition words with three or more syllables become one or two syllable alternatives.

Write like you talk (without the filler)

Imagine explaining your topic to a friend over coffee. You would not say "the implementation of this methodology yields significant improvements in workflow efficiency." You would say "this approach saves you about three hours a week."

This does not mean writing exactly like you talk. Spoken language has filler words, false starts, and grammatical chaos. Written language needs more structure. But the gap between "how you talk" and "how you write" should be small, not a canyon.

If you want a deeper read on making your AI output sound more natural, check out our guide on how to make AI writing sound natural.

Add concrete details instead of abstractions

AI writing defaults to the abstract. "Many companies struggle with content quality." Which companies? What kind of content? What does "struggle" look like?

Abstract language is safe because it commits to nothing. But safe writing is forgettable writing. Replace vague claims with specific examples:

"Teams save time" becomes "Our content team cut editing time from 4 hours per post to 45 minutes." "Many tools exist" becomes "We tested seven AI detection tools and three of them flagged Shakespeare as machine-generated."

Specific details do two things. First, they prove you actually know what you're talking about instead of remixing surface-level knowledge. Second, they give the reader something concrete to remember. Nobody remembers "improve your workflow." They remember "we cut 3 hours off editing time."

Use contractions and short words

One of the fastest ways to spot AI text is the absence of contractions. "It is" instead of "it's." "Do not" instead of "don't." "We are" instead of "we're."

Humans use contractions constantly in speech and informal writing. AI defaults to the expanded form because it's been trained to be precise. But precision at the cost of naturalness is a bad trade.

Go through your draft and expand nothing. Contract everything. Drop "it is" for "it's." Swap "that is" for "that's." Trade "you will" for "you'll." The cumulative effect is significant. The text immediately sheds about 30% of its stiffness.

Same logic applies to word choice. "Utilize" becomes "use." "Implement" becomes "do" or "try." "Facilitate" becomes "help." Short Anglo-Saxon words land harder than Latinate ones. Hemingway knew this. So should you.

Read it out loud before you ship

This is the oldest editing trick in the book and it works especially well for AI drafts. Reading aloud exposes stiffness that your eyes skip over on the screen.

When you hit a sentence that's hard to say, it's hard to read. Mark it. Shorten it. Split it. When a paragraph runs out of air before you do, it's too long. When you stumble on a word, swap it for something simpler.

Most people skip this step because it feels silly. Do it anyway. Three minutes of reading aloud catches more stiffness than twenty minutes of silent editing.

If you want to add more personality beyond just de-formalizing, our guide on adding personality to AI writing covers voice, anecdotes, and the specific edits that make text feel like yours.

The 2026 tone test: what readers notice first

Detector research and reader surveys keep converging on the same finding: tone is the loudest tell. A 2026 analysis of reader reactions found that formal register was the single strongest signal that text was machine-written, stronger than word choice or factual accuracy.

The reason is simple. Language models default to the safest, most correct version of every sentence. That produces the corporate press release voice: precise, balanced, and completely forgettable. Readers do not consciously notice the register. They just feel that nobody is home.

The fix has not changed, but the stakes have. Every technique in this guide, breaking rhythm, swapping transitions, contracting, reading aloud, directly attacks the formal register. Run even three of them and the draft immediately sounds like a person wrote it.

One useful 2026 shortcut: write your first sentence before you prompt the AI. A conversational opener anchors the whole piece. The model will match the register you set, so a casual first line prevents the formal drift that usually follows.

If you want to go further than de-formalizing, the guide on how to make AI writing sound human covers the full set of AI tells and how to fix each one.

And for a tool-assisted pass, our comparison of the best AI humanizer tools shows which ones strip formality without mangling your meaning.

Making AI writing sound less formal is not about dumbing things down. It is about removing the layer of polish that signals "a machine wrote this" and replacing it with the natural variation that signals "a person wrote this."

Frequently asked questions