AI Humanizer Prompt Generator

What an AI humanizer prompt is

An AI humanizer prompt is the block of instructions you put above your draft that tells the model how a person actually writes: varied sentence length, real specifics, a stated opinion, and none of the filler that shows up in every AI answer. This tool writes that prompt for you. Describe what you're writing — or paste the flat draft you already have — and you get a copy-ready prompt to run in ChatGPT, Claude, Gemini, or whatever you use.

To be clear about what this is: it's a prompt that makes AI writing sound like you. It is not a tool for beating AI detectors, and the last section explains why that distinction matters if the writing goes to a client.

Why the default output sounds like AI

Nothing is broken. The model is answering a question you didn't narrow, and with no audience, no stance, and no facts to work from, generic prose is all that's left. Generic prose has a signature:

• Every sentence lands at roughly the same length, in paragraphs that are all three sentences long.
• Hedges stand in for positions: "can be a valuable tool," "it's important to note that."
• Vocabulary nobody says out loud: delve, leverage, robust, seamless, landscape, tapestry.
• A closing paragraph restates the piece instead of ending it.
• Nothing is in it that only you would know — no names, no numbers, no dates, no story.

Asking for "a more human tone" doesn't fix any of that. You get the same paragraph with contractions added. What fixes it is putting back the things that were missing.

Before and after

Here's the prompt most people write:

rewrite this so it sounds more human

And here's the version that works:

Rewrite the text below so it reads like I wrote it in an email to a client
I've worked with for two years.

Rules:
- Vary sentence length. At least one sentence under six words.
- Cut any phrase that could appear in an article on any topic ("in today's
  landscape", "it's important to note", "powerful tool", "unlock").
- Keep every specific I gave you: names, numbers, dates, product names.
  Invent none.
- No em dashes. No three-item lists unless there are genuinely three things.
- No closing summary paragraph. End on the last real point.
- Say things once. If a sentence only restates the one before it, delete it.

Text:
[paste your draft]

Same request. The second one produces something you can send without rewriting it by hand.

The one move that changes the most: give it your writing

Every instruction above is a rule about what to avoid. A voice sample is a rule about what to aim at, and it outperforms all of them.

Below are three things I've written. Study the sentence rhythm, the words I
reach for, and what I never do.

[paste 200-400 words of your own writing — old emails are fine]

Now rewrite the draft that follows in that voice. Match my rhythm, not my
topic. Where you had to guess at my opinion, mark the sentence with [CHECK]
so I can correct it.

Draft:
[paste your draft]

The [CHECK] marker matters. Without it the model quietly invents a position for you, and inventing your position for a client is the one failure you can't afford.

Three more prompts worth keeping

Make it specific instead of smooth. Most drafts read as AI because they contain no facts, not because the sentences are wrong.

This draft is generic because it has no facts in it. Ask me up to five
questions whose answers would make it concrete — numbers, names, dates,
what actually happened. Wait for my answers, then rewrite using them.
Do not invent details.

The read-aloud test.

Rewrite this so I could read it aloud to a colleague without sounding like
a press release. Any sentence I wouldn't say out loud, cut it or rewrite it.
Same length or shorter.

The banned-phrase rule. Save this one and paste it at the top of any writing session:

When you write for me, never use: delve, leverage as a verb, robust,
seamless, landscape, tapestry, "it's important to note", "in today's
fast-paced world", "game-changer", "at the end of the day". Never open with
"In today's". Never close with a paragraph that summarizes what you just said.

If you'd rather start from a saved prompt than generate a new one, the Humanize AI Writing prompt in our library is the copy-ready version of this approach. The full walkthrough, with more before/after pairs, is in the guide on prompts to make ChatGPT write like a human.

About AI detectors

Do not put "make this undetectable by AI detectors" in your prompt. Two reasons.

First, detectors are unreliable in both directions — they flag human writing and clear AI writing often enough that no output is guaranteed either way. Second, and more practically, prompts written to fool a classifier produce strange prose: odd synonyms, broken rhythm, sentences that avoid the obvious word. That reads worse to the human who is actually going to open the email.

The durable fix is the same either way: writing that carries your specifics and your opinion doesn't read as generated, because it isn't generic. A detector was never the reader.

Human-sounding is a prompt problem, not an editing problem

Once you've written the humanizer prompt, the work is remembering to use it. Pasting a draft into a separate tab, running it, and copying the result back is fine on the piece that matters — and it's the step you'll skip on the twelve pieces that also go out with your name on them.

The free Prompt Sloth Chrome extension applies your rules where you're already typing, inside ChatGPT, Claude, Gemini, and 20+ AI tools. Your banned-phrase list and your voice sample come along with you instead of living in a note you have to find. If your problem is one step earlier — the prompt itself is too vague — the AI prompt enhancer and the ChatGPT prompt improver handle that, and the guide on making ChatGPT sound professional covers the client-facing version of the same problem.

Stop rewriting AI drafts by hand. Install the free Prompt Sloth extension and keep your voice rules on every prompt.