Em dashes
Long dashes (—) that AI models use far more than most people do. Choose commas or plain hyphens. Number ranges like 2020–2024 become 2020-2024.
Free tool · No sign-up
AI Text Cleaner
Remove em dashes, hidden characters and curly quotes from ChatGPT, Claude or Gemini text. Paste it in and copy the clean version.
Replace dashes with
0 words
Your text stays in your browser. Nothing is uploaded.
Cleaning fixes characters, not wording. AI detectors judge sentence patterns, so cleaned text can still be flagged. The Lumi humanizer rewrites those patterns, and you get 300 free words when you sign up.
What the cleaner removes
Hidden characters
Zero-width spaces, byte order marks, soft hyphens and direction marks. They are invisible but come along when you copy and paste. Emoji stay intact.
Odd spaces
Non-breaking and thin spaces that look normal but behave differently in documents and forms.
Curly quotes and ellipses
Typographic quotes become straight quotes, and the single ellipsis character becomes three periods.
Markdown symbols
Leftover **bold** markers and # heading signs from chat answers. Turn this off if your text needs Markdown.
What it can and can't do
It can
- Remove the characters listed above in one paste
- Keep your paragraphs and line breaks as they are
- Work without an account, and your text never leaves your browser
It can't
- Change your wording or sentence structure
- Make AI text pass an AI detector on its own
- Check facts, grammar or plagiarism
Want the wording to read naturally too?
The Lumi humanizer rewrites stiff, repetitive AI phrasing into natural sentences. You get 300 free words when you sign up.
Frequently asked questions
Is the AI Text Cleaner free?
Yes. It is free with no sign-up and no word limit beyond 50,000 characters per paste.
Is my text uploaded anywhere?
No. The cleaning runs in your browser, so your text is not sent to Lumi or anyone else. Only anonymous usage counts are recorded if you accept analytics cookies.
Why does AI text have so many em dashes?
Models like ChatGPT use em dashes much more often than most writers. Many readers now treat a page full of them as a sign of AI writing, so people replace them before publishing or submitting.
What are hidden characters in ChatGPT text?
They are invisible Unicode characters such as zero-width spaces and byte order marks. They can come from copying out of a chat window or editor. They do not change how text looks, but they can break formatting and word counts.
Will cleaning make my text undetectable by AI detectors?
No. AI detectors mainly judge word choice and sentence patterns, so removing characters alone rarely changes a score. To change the wording itself, use a rewriting tool such as the Lumi humanizer.
Does it work with Claude, Gemini and other AI tools?
Yes. It cleans any pasted text, whichever tool wrote it.