How to clean AI text
- Paste ChatGPT, Claude, Gemini, or any other AI output into the box above.
- Pick exactly what to strip from the nine cleaning options. The character-level cleaners (hidden characters, dashes, quotes, ellipsis, non-breaking spaces, trailing whitespace) are on by default. The Markdown strippers (asterisks, headings, other Markdown) are off by default so words stay intact unless you want them flattened.
- Copy the cleaned version with one click. The text is ready to drop into LinkedIn, X (Twitter), Substack, Notion, a blog CMS, or any other editor.
Why clean AI text at all
Models like ChatGPT, Claude, and Gemini are trained on edited prose, so their output comes out loaded with typographic characters most people never type directly. Emdashes, curly quotes, and horizontal ellipsis show up in almost every paragraph. On top of that, models format in Markdown by default, so headers, bold, italic, and lists come baked into the response. When you paste that into a plain text field, a social post, or a CMS that does not render Markdown, you see the raw markers and the text looks broken.
The AI text cleaner strips the cosmetic layer so the text you share reads like something a human typed. Same words, same meaning, no emdashes, no asterisks, no hidden characters.
What each cleaning option does
- Remove hidden characters. Strips zero-width space, zero-width joiner, zero-width non-joiner, word joiner, soft hyphen, and the byte order mark. These never render but travel around in pasted AI output and can flag text as machine-generated.
- Convert non-breaking spaces. Turns every non-breaking space into a regular space so the text flows and wraps normally.
- Normalize dashes. Converts emdashes to a spaced hyphen and endashes to a plain hyphen.
- Normalize quotes. Replaces curly single and double quotes, low quotes, and prime marks with their straight ASCII equivalents.
- Convert ellipsis. Replaces the single ellipsis character with three dots.
- Remove trailing whitespace. Trims trailing spaces and tabs from every line and strips trailing blank space at the end of the document.
- Remove asterisks. Strips Markdown bold (
**text**) and italic (*text*) markers without touching the words between them. - Remove Markdown headings. Drops the leading #, ##, and ### characters so headings flatten into normal lines.
- Remove other Markdown. Covers the rest of the Markdown layer: bullet and numbered list markers, Markdown links and images (the visible text is kept), inline code, fenced code blocks, blockquotes, horizontal rules, strikethrough, and underscore-based emphasis.
What the cleaner leaves alone
- Your words, punctuation, numbers, and sentence structure.
- Paragraph breaks you actually meant to keep.
- Text inside code blocks when "Remove other Markdown" is off. When it is on, the code fences are removed but the code itself is preserved.
- Anything the options are turned off for.
Common uses
- Posting on LinkedIn, X, or Threads. Paste the AI draft, clean it, post without the emdash tell.
- Newsletter and Substack copy. Clean text before pasting into the editor so bold, italic, and headers match your own style.
- Blog and CMS imports. Flatten Markdown before pasting into a WYSIWYG editor that does not parse it.
- Prompts and notes. Remove formatting from pasted text before feeding it back into a model or saving it as a note.
- Slides, docs, and emails. Strip hidden Unicode and Markdown before pasting into Google Docs, Notion, or Gmail.
AI text cleaner vs AI detector vs humanizer
These tools all sound similar but do different things. An AI detector scores text and guesses whether a model wrote it. A humanizer rewrites sentences so a detector is less likely to flag them. The AI text cleaner on this page does neither. It only strips the cosmetic characters and formatting that tend to give AI output away. Think of it as a format remover and ChatGPT cleaner, not a rewriter or scrubber.
Frequently asked questions
What does the AI text cleaner do?
It takes pasted text, usually output from ChatGPT, Claude, Gemini, Perplexity, or a similar model, and strips the characters and formatting that give it away as AI-written. That includes emdashes, curly quotes, invisible Unicode like zero-width spaces, and every Markdown marker (bold, italic, headers, code, links, lists, and blockquotes). You get clean plain text that reads the same but drops all the tells.
How do I clean AI text?
Paste the text into the box above. The cleaner runs instantly. Use the nine cleaning options to pick exactly what to strip: hidden characters, non-breaking spaces, dashes, quotes, ellipsis, trailing whitespace, asterisks, Markdown headings, and other Markdown formatting. Copy the cleaned version with one click. The tool runs entirely in your browser, so nothing is uploaded, logged, or saved on a server.
Why does the text have emdashes and curly quotes in the first place?
Large language models are trained on professionally edited writing where emdashes, endashes, curly quotes, and typographic ellipsis are the norm. When the model generates text, those same characters come out by default. A lot of people have started to recognize the emdash in particular as an AI tell, so removing it makes the text look and feel more like something a human typed on a keyboard.
What exactly is an AI character?
Anything that is not on a standard keyboard but shows up constantly in AI output. The most common ones are the emdash, the endash, left and right curly single and double quotes, the horizontal ellipsis, and invisible Unicode like zero-width space (U+200B), non-breaking space (U+00A0), and the byte order mark (U+FEFF). The cleaner replaces them with their plain ASCII equivalents, or removes them when they have no visible counterpart.
Does it remove Markdown formatting too?
Yes. Three dedicated options cover the Markdown layer. "Remove asterisks" strips bold and italic markers. "Remove Markdown headings" drops the # symbols at the start of lines. "Remove other Markdown" handles lists, links, inline code, fenced code blocks, blockquotes, horizontal rules, and strikethrough. The underlying words stay intact. This is what people mean when they search for a text format remover or a way to clear formatting from pasted text.
Will it damage my writing or change the meaning?
No. The cleaner only rewrites characters and removes formatting markers. It never changes words, punctuation that matters, numbers, or sentence structure. The text you paste and the text you copy back have the same content. Only the cosmetic layer is different.
Can I use this to clean ChatGPT output before posting on LinkedIn, Twitter, or a blog?
That is the most common reason people use it. ChatGPT output pasted directly into LinkedIn, X (Twitter), Substack, or a CMS usually carries emdashes, curly quotes, and Markdown that either do not render or look unnatural. Running the text through the cleaner first gives you plain text that behaves predictably everywhere.
Is this an AI detector or a humanizer?
Neither. It is a character and formatting cleaner. It does not rewrite sentences, does not score the text, and does not claim to make AI output undetectable. It strips the cosmetic tells (emdashes, curly quotes, hidden Unicode) and flattens Markdown. Rewriting is a separate step you would do yourself or with a different tool.
Does it remove zero-width and invisible characters?
Yes. Invisible characters are a favorite way for some platforms to watermark or attribute AI text. The cleaner strips zero-width space (U+200B), zero-width joiner (U+200D), zero-width non-joiner (U+200C), word joiner (U+2060), soft hyphen (U+00AD), and the byte order mark (U+FEFF). Non-breaking space (U+00A0) is converted back to a regular space so the text flows normally.
Is anything I paste sent to a server?
No. The AI text cleaner runs fully in your browser. It does not make any network requests when you paste, clean, or copy text. You can turn off your Wi-Fi and it still works. That also means whatever you clean is never seen by us.
Save cleaned notes and articles in Keep
Keep saves the things you read as clean, searchable Markdown you can hand to your AI agent or drop into any editor. If you spend a lot of time cleaning AI output, keeping the source article in Keep in a known-good format is the upstream fix.