🔒 Actually private
Most "AI humanizer" sites upload your text to their servers. PurePaste is a static page — the cleaning happens in your browser and works even offline.
⚡ Deterministic, not another AI
No model rewrites your words. Every fix is a transparent rule you can toggle, so the output is your text — just clean.
🕵️ Finds what you can't see
Zero-width spaces, word joiners, narrow no-break spaces: AI output often carries invisible Unicode that breaks search, diffs, and formatting. We strip it.
Why does AI text need cleaning?
Large language models have recognizable habits: they use em dashes at several times the human rate, produce typographic “smart” quotes that break code and forms, leave markdown symbols behind when you copy from a chat window, and can include invisible Unicode characters that survive copy-paste. Beyond formatting, certain phrases (“it's not just X, it's Y”, “delve”, “seamless”) read as machine-written to anyone who sees AI text daily — which in 2026 is everyone.
PurePaste is an editing tool for people who use AI drafts legitimately and want them to read naturally: fix the mechanical artifacts automatically, then use the phrasing report to make the words yours. It is not a tool for passing off unedited AI work as your own — the phrasing is still yours to rewrite.
Frequently asked questions
Is my text uploaded anywhere?
No. PurePaste is a static web page with no backend. Cleaning runs entirely in your browser using JavaScript — you can disconnect from the internet and it keeps working. We have no server to send your text to.
Why does ChatGPT use so many em dashes?
Em dashes are common in the edited prose that models learn from, and models reproduce them at far above human rates — one of the most recognizable signs of AI text. PurePaste rewrites em-dash asides into commas, periods, or hyphens, your choice.
What are the hidden characters you remove?
Zero-width spaces (U+200B), zero-width joiners, word joiners (U+2060), soft hyphens, directional marks, and unusual spaces like the narrow no-break space (U+202F). They're invisible but real: they break Ctrl+F search, corrupt code, and reveal where text came from. See the hidden character remover.
Does this make AI text undetectable?
No, and that's not the goal. PurePaste fixes formatting artifacts and points out robotic phrasing so you can edit it yourself. Writing you've genuinely edited is your writing.
Is it really free?
Yes — the cleaner is free, with no account and no limits.