Remove Em Dashes from AI Text
Paste text from ChatGPT, Claude, or Gemini and every em dash is replaced with the punctuation you choose. Free, private, and instant.
How to Use This Tool
Paste your text
Paste the text you want to clean into the left box.
Pick a replacement
Choose comma, period, colon, or spaced hyphen. Comma fits most sentences.
Copy the result
The cleaned text updates as you type. Click Copy and paste it anywhere.
Dash and Punctuation Reference
| Character | Looks like | Replaced with |
|---|---|---|
| Em dash (U+2014) | fast—really fast | fast, really fast |
| Spaced em dash | fast — really fast | fast, really fast |
| En dash range (U+2013) | 2020–2024 | 2020-2024 |
| Typewriter dash | good -- great | good, great |
| Curly quotes | “quoted” it’s | "quoted" it's |
| Ellipsis (U+2026) | wait… | wait... |
| Zero-width space (U+200B) | (invisible) | (removed) |
Em Dashes and AI: Why ChatGPT Overuses Them
The em dash is a legitimate piece of punctuation with a long history in edited writing. The problem is frequency. AI assistants reach for it in almost every paragraph, often several times, to bolt an aside onto a sentence or to set up a reveal. Human writers rarely do, partly because most keyboards have no em dash key.
That gap turned the character into a signal. Readers, editors, and teachers now notice it, and a message that would otherwise sound fine can read as pasted from a chatbot. Swapping each dash for the punctuation you would have typed yourself is the quickest fix, and it usually makes the sentence plainer and clearer too.
Replacing punctuation does not make text undetectable and is not meant to. If you are using AI to draft, the better habit is to rewrite in your own voice. This tool handles the tedious mechanical part.
Frequently Asked Questions
Why does ChatGPT use em dashes so much?
Large language models learn punctuation from published writing, where em dashes are common in edited prose. Instruction tuning then rewards a confident, explanatory style that leans on them for asides and pivots. The result is text with far more em dashes than most people use, which is why readers now treat them as a sign of AI writing.
Is an em dash a sign of AI writing?
Not by itself. The em dash is standard punctuation and plenty of good writers use it. What stands out is density: several unspaced em dashes per paragraph in text that otherwise sounds like a chatbot. Readers, editors, and teachers now treat that pattern as a hint of AI, which is why people remove them from AI drafts before sending.
How do I stop ChatGPT from using em dashes?
Add a line such as "Never use em dashes" to your custom instructions or the prompt. That reduces them, but models still slip, especially in long answers. Pasting the reply here catches whatever gets through.
What should replace an em dash?
A comma works for most asides and is the default here. Use a period when the dash joins two complete thoughts, a colon when it introduces an explanation or list, and a spaced hyphen if you want to keep the visual pause. You can switch between them and the output updates instantly.
Does this change dashes in number ranges?
En dashes between numbers or words, like 2020–2024 or pages 10–12, become a plain hyphen so the range still reads correctly. Spaced en dashes used as sentence breaks are replaced like em dashes. You can turn en dash handling off.
Will it break my markdown or code?
No. Inline code and fenced code blocks are left exactly as they are, and markdown syntax like table rules (---), list markers, and CLI flags such as --save is not touched. Only em dashes used as punctuation are replaced.
What are the invisible characters it removes?
Zero-width spaces, zero-width joiners, word joiners, byte order marks, and non-breaking spaces. They sometimes appear in copied AI output and web text, and they cause odd line wrapping, failed searches, and broken code. Non-breaking spaces become normal spaces and the rest are deleted.
Is my text sent anywhere?
No. The cleanup runs entirely in your browser with JavaScript. Nothing is uploaded, logged, or stored.
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