TL;DR
Text sounds like AI when it stacks several patterns at once: even sentence lengths, stock phrases like "it's important to note," formal transitions, hedging, groups of three, and generic examples. One pattern proves nothing. Read your draft aloud, run the 10-point check below, and use a transparent checker that shows which signals it found rather than a single score.
First, What "Sounds Like AI" Actually Means
When readers say something sounds like AI, they're reacting to a cluster of habits, not a single word. Language models write in a smooth, even, slightly formal register that averages out the quirks of individual writers. Wikipedia's editors, who review a lot of machine-written text, keep a detailed field guide to these habits, and they're careful to say each one is a potential sign, not proof. (Wikipedia: Signs of AI writing)
That's important if you wrote the text yourself. Plenty of careful human writers trip one or two of these signals. What reads as machine-made is several of them at once, sustained across a whole piece.
The 10-Point Check
Go through your draft and count how many of these apply:
- 1. Every sentence is about the same length. Real writing mixes short and long. If most sentences run 18 to 25 words, the rhythm feels machine-made. (Why short sentences help)
- 2. Stock phrases. "It's important to note," "in today's fast-paced world," "plays a pivotal role," "delve into." Our list of words ChatGPT overuses is a good scan list.
- 3. Formal transitions everywhere. "Furthermore," "moreover," "additionally" at the start of sentence after sentence.
- 4. Hedging. "It could be argued," "to some extent," "potentially" softening claims you actually believe.
- 5. Groups of three. Lists of three adjectives or three parallel clauses, again and again.
- 6. "Not just X, but Y." The negative parallelism ("It's not just a tool, it's a movement") is one of the most recognizable patterns.
- 7. Every paragraph ends with a neat summary. A closing line that restates the paragraph's point, every time.
- 8. Generic examples. "For example, a small business might use this to improve efficiency." No names, numbers or specifics.
- 9. Repeated sentence openers. Several sentences in a row starting with "This," "The" or the same subject.
- 10. Dense em dashes. One dash is style. A dash in every paragraph, used the same way, is a pattern. (Why ChatGPT loves em dashes)
Scoring: 0 to 2 is normal writing. 3 to 5 means some passages will read as generic. 6 or more and most readers will suspect a chatbot, whether or not one was involved.
Check It Automatically (Without Uploading It)
If you'd rather not count by hand, paste the text into our free AI content detector. It measures six of the signals above (sentence-length variation, AI clichés, formal transitions, hedging, passive voice and repeated openers) and shows each one separately, with a hint on how to fix it. It runs entirely in your browser, so the text isn't uploaded. (Why that matters)
Use the result as a map of what to edit, not as a verdict. A high score on a document you wrote yourself just means your style overlaps with AI habits in those places. Our guide to AI detector false positives explains why this happens to real writers, especially non-native English speakers.
The Read-Aloud Test
The fastest human check is to read the text out loud. AI-sounding prose has a steady, even beat with no surprises. You'll notice it as a kind of drone. Mark every place where you'd never actually say the sentence that way. Those are the lines to rewrite.
Then ask one question per paragraph: could anyone else have written this? If the answer is yes, it needs something only you know: a number, a name, an opinion or a small detail from experience. Specificity is the strongest human signal there is. (What makes writing sound human)
Quick Fixes for the Most Common Problems
| Problem | Fix |
|---|---|
| Even sentence lengths | Split one long sentence into two. Add one very short sentence per paragraph. |
| Stock phrases | Delete them. Most sentences read better without "it's important to note that." |
| Formal transitions | Replace with plain words ("also," "but," "so") or remove them entirely |
| Hedging | Commit to the claim, or say specifically what you're unsure about |
| Generic examples | Swap in a real example with a name, number or place |
| Neat paragraph endings | Cut the last sentence of each paragraph and see if anything is lost |
For a longer draft, our complete guide to humanizing AI text walks through the full edit. If the draft started in ChatGPT and you need to fix the rhythm quickly, the Simply Humanize tool rewrites for natural sentence variation and plainer phrasing. Then add your own specifics, because no tool knows them.
When It Matters Most
- Essays: Keep your drafts and notes. If you're ever questioned, evidence of your process beats any detector score. See Grammarly Authorship.
- Cover letters and resumes: Recruiters skim, and generic phrasing gets skipped. See AI cover letters: do recruiters notice?
- Work email and reports: Colleagues increasingly spot AI filler, and it can cost you credibility. See what AI workslop is.
Frequently Asked Questions
How can I tell if my writing sounds like AI?
Look for several patterns together: even sentence lengths, stock phrases, formal transitions, hedging, groups of three and generic examples. Read it aloud and use a checker that shows individual signals rather than a single score.
Can my own writing sound like AI?
Yes. Formal, carefully structured writing overlaps with AI habits, and non-native English speakers are flagged more often. That's why one signal, or one detector score, is never proof.
Is there a free tool to check if text sounds like AI?
Simply Humanize's AI content detector is free, needs no account, runs in your browser and breaks the result into six writing signals you can act on.
What's the fastest way to make text sound less like AI?
Vary sentence length, delete stock phrases and formal transitions, commit to your claims, and replace generic examples with specific ones from your own knowledge.