Smart quotes to straight quotes converter

Curly "smart" quotes look nice in print but wreak havoc in code, CSVs, and terminals — and AI chatbots emit them constantly. One pasted curly apostrophe can break a SQL query or a JSON file.

CopyCleanse converts every quote variant — curly doubles, curly singles, guillemets, primes, low-9 quotes — to plain straight quotes, and highlights each conversion so you can verify the result.

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Frequently asked questions

Which quote characters are converted?
Left/right curly double and single quotes, low-9 quotation marks, guillemets, single guillemets, modifier apostrophes, and prime marks — all normalized to straight ASCII quotes.
Why do smart quotes break code?
Programming languages only recognize straight quotes (' and ") as string delimiters. A curly quote is a different Unicode character, so parsers reject it — often with a confusing error.
Does it change anything else?
The full cleaning pass also normalizes em dashes and ellipses and removes invisible characters, so pasted AI text comes out clean in one step.