Unnerd AI
You commented HUMANIZE
Make ChatGPT sound like you, not like ChatGPT
Four rules in one prompt. Save it in your custom instructions and every draft starts closer to your own voice.
Checked on 14 Oct 2026. Tools change fast, so the official page always wins if it says something different.
Step by step
Pick a sample of your own writing
Something you wrote yourself, like an email or a post. Not a private message.
Make your ban list
These words and habits give AI away. Start with these and add your own.
delve game-changer in today's fast-paced world exciting news thrilled new chapter emojis everywhere hashtags at the end
Paste the full prompt
Put your sample and your ban list where the brackets are.
Learn my writing style from this sample: [paste your writing] Rules for everything you write for me: 1. Write in my style from the sample. 2. Never use these words or phrases: [paste your ban list] 3. Mix short and long sentences. No fancy dashes. No lists unless I ask. 4. Before you answer, read it back like a real person would and cut anything I wouldn't say out loud.
Save it so every chat uses it
Go to Settings → Personalization → Custom instructions and paste the rules there. You need an account for this.
Read it back yourself
Read every draft out loud and cut anything you wouldn't say. That last pass is still your job.
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The catch
- It gets closer, not perfect. You still read it and edit.
- Custom instructions need an account. Logged out, paste the prompt at the start of each chat.
- Don't paste private messages as your writing sample.
Official links
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Unnerd AI · I'm not linked to OpenAI, I just think it's useful.