AI Word Checker
Paste your text and see exactly which words make it sound machine-written — with a density score, a plain-English replacement for each one, and highlights in place. Free, no sign-up, and it never leaves your browser.
Start typing and the scan runs live. The list covers stock AI phrasing, filler transitions, and the vocabulary language models reach for far more often than people do.
An AI word checker flags vocabulary that language models overuse — “delve”, “tapestry”, “it is important to note” — and reports how densely it appears. Density is the signal; any single word means nothing.
How it works
- 1Paste your text. Drop in a draft, an essay, an email, or anything you want to check.
- 2Read the density score. You get AI terms per 100 words, which is the only number that carries meaning.
- 3Work through the table. Each term comes with a plainer alternative you can use instead.
- 4Fix what is left. Word choice is half the problem — send it to the humanizer for the rhythm.
Why certain words give AI away
Language models pick the most probable next word, and over billions of training examples certain choices became statistically favoured: “delve” instead of “look at”, “leverage” instead of “use”, “tapestry” for anything varied, “it is important to note that” before any ordinary claim. None of these is wrong. They are all real English and appear in good human writing. What gives a text away is density — six of them in a 200-word paragraph is a pattern no ordinary writer produces by accident, and readers feel it even when they cannot name it.
Why a checker reports a rate, not a verdict
A tool that told you “this is AI” based on a word list would be lying to you. One “moreover” means nothing. A single “crucial” means nothing. This is why the score here is occurrences per 100 words rather than a percentage or a yes/no: it tells you how concentrated the pattern is and leaves the judgement where it belongs. Under about 1.5 per 100 words is a rate ordinary human writing reaches all the time. Above about 3.5 you are looking at the vocabulary profile of an unedited AI draft.
This makes your writing better regardless of who wrote it
Almost everything on the list is padding, hedging, or throat-clearing. “It is important to note that X” is just “X”. “Plays a crucial role in” is “does”. “In today's fast-paced world” is nothing at all. Cut them and the sentence gets shorter and more direct, which is an improvement whether a person or a model produced the draft. That is why this tool is worth running on your own writing even when AI was never involved.
What a word list cannot tell you
AI detectors do not score vocabulary. They score how predictable your word choices are across the whole passage (perplexity) and how much your sentence lengths vary (burstiness). You can replace every flagged word here and still leave a text that reads as machine-written, because the sentences are all still 17 words long and every paragraph still opens with a topic sentence. That is a structural problem, and it needs restructuring rather than substitution — which is what the humanizer does and what this page cannot.
How to actually fix a flagged draft
Work in this order. First cut the stock phrases outright — most of them are deletable with no replacement. Second, swap the inflated verbs and adjectives for the plain ones in the table. Third, and this is the part that matters most, break the rhythm: split one long sentence in two, let another run long, and start a paragraph with something other than a topic sentence. Then check the result with the free AI detector to see where you actually stand rather than guessing.
Free, unlimited, and private
The ai word checker is free with no sign-up and no limit on how much text you process. Because it runs entirely in your browser, your text is never sent to a server, stored, or used to train any AI — it never leaves your device. When you’re ready to do more with your writing, Humanit’s AI humanizer and AI detector are one click away.
| Rate | Reads as | What to do |
|---|---|---|
| 0 | Clean vocabulary | Nothing here. Check rhythm separately. |
| Under 1.5 | Light — normal human range | Optional tidying. |
| 1.5 – 3.5 | Noticeable to a reader | Cut the stock phrases. |
| Over 3.5 | Unedited AI profile | Rewrite, do not just substitute. |
| Instead of | Write | Why |
|---|---|---|
| delve into | look at, examine | The single most-cited AI tell. |
| leverage | use | Corporate padding in almost every case. |
| it is important to note that | (delete) | If it were not important you would not write it. |
| a testament to | shows, proves | Says less than the shorter word. |
| in today’s fast-paced world | (delete) | Carries no information at all. |
| tapestry, realm, landscape | the actual noun | Vague metaphors standing in for specifics. |
| moreover, furthermore | also, or nothing | Fine once; a tell when every paragraph has one. |
Frequently asked questions
What words does AI use most?
The most-cited are “delve”, “tapestry”, “realm”, “leverage”, “foster”, “pivotal”, “crucial”, “seamless”, “robust” and “meticulous”, along with stock phrases like “it is important to note that”, “plays a crucial role” and “in today’s fast-paced world”. This checker scans for around 90 of them.
Does using these words mean my text was written by AI?
No. Every word on the list is ordinary English used by human writers every day. Only density carries signal, which is why this tool reports a rate per 100 words rather than a verdict — and even that is an indication, never proof.
Will removing these words beat an AI detector?
Not on its own. Detectors score sentence rhythm and word predictability across the whole passage, not vocabulary from a list. Swapping words helps a little; varying sentence length and structure does far more. Check the result with a free detector rather than assuming.
Is the AI word checker free?
Completely. No account, no limit, and it runs entirely in your browser, so your text is never uploaded or stored.
Why is “delve” such a famous AI word?
It is uncommon in everyday writing but appears constantly in language-model output, which made the contrast obvious once people started looking. It became shorthand for the whole pattern rather than being uniquely important on its own.
Can I use this on my own human writing?
Yes, and it is genuinely useful there. Most flagged terms are padding — cutting them makes any draft shorter and more direct, whoever wrote it.
Do I need an account?
No. There’s no sign-up and no install — open the page and start typing.
Does it work on mobile?
Yes — it works in any modern browser on phone, tablet, or desktop.
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Open the AI HumanizerLast updated: August 2026