GPT Cleanup

Free Zero-Width Space Remover

Remove invisible zero-width spaces, hidden Unicode characters, and formatting artifacts from any text. One click, instant results.

100% client-side · No data is ever sent to a server · Works with text from any source

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What Are Zero-Width Spaces and Why Do They Matter?

Zero-width spaces (U+200B) are invisible Unicode characters that occupy no visual space in rendered text. You can't see them, but they're there — hiding between words, inside keywords, and throughout paragraphs. They're one of several "zero-width" Unicode characters that AI chat interfaces routinely inject into copied text.

When you copy text from ChatGPT, Claude, Gemini, or other AI tools, the chat interface's rich-text rendering system often embeds these invisible characters as part of its internal text management. The characters serve purposes like cursor positioning, word boundary detection, and line-break hinting within the chat UI — but when they travel with your copied text, they become invisible contaminants.

The consequences range from annoying to severe: broken keyword matching in SEO, silent failures in code, corrupted data in spreadsheets, and false positives in plagiarism detection tools. Our zero-width space remover strips all of these invisible characters instantly, entirely in your browser.

Common Zero-Width Characters We Remove

CharacterUnicodeWhat It Does
Zero-Width SpaceU+200BInvisible breakpoint that splits text without visible separation — breaks keyword matching and search indexing
Zero-Width JoinerU+200DJoins characters that would otherwise be separate — used in emoji sequences but problematic in plain text
Zero-Width Non-JoinerU+200CPrevents character joining — can break ligatures and cause rendering issues in certain languages
Byte Order MarkU+FEFFEncoding marker that should only appear at file start — when found mid-text, indicates AI processing
Word JoinerU+2060Prevents line breaks between words — invisible glue that AI tools insert for text rendering
LTR / RTL MarksU+200E / U+200FDirection control characters — suspicious when found in monolingual text copied from AI tools

Frequently Asked Questions

Common questions about zero-width spaces and invisible characters

What are zero-width spaces?
Zero-width spaces (U+200B) are invisible Unicode characters that take up no visual space but exist in the text data. They're commonly injected by AI chat interfaces like ChatGPT, Claude, and Gemini during copy operations. They can break keyword matching, cause issues with search indexing, and create bugs in code.
Why does ChatGPT add zero-width spaces?
AI chat interfaces use zero-width characters internally for cursor tracking, rich-text rendering, and word boundary management. When you copy text from these interfaces, these invisible characters come along for the ride. They're not intentional watermarks — they're artifacts of how the chat UI renders and manages text.
Can zero-width spaces affect SEO?
Yes. Zero-width spaces in title tags, meta descriptions, or heading text can split keywords from a search engine's perspective. For example, 'artificial[U+200B]intelligence' looks normal to humans but search engines may see it as two separate tokens, diluting keyword relevance.
Do zero-width spaces break code?
Absolutely. A zero-width space in a variable name, JSON key, URL, or API endpoint creates bugs that are extremely hard to debug because the character is completely invisible. The code looks correct but fails silently. This is a common problem when copying code snippets from AI tools.
What invisible characters does this tool remove?
We remove zero-width spaces (U+200B), zero-width joiners (U+200D), zero-width non-joiners (U+200C), byte order marks (U+FEFF), word joiners (U+2060), direction markers (U+200E/F), soft hyphens (U+00AD), and replace non-breaking spaces (U+00A0) with regular spaces. We also normalize smart quotes, em dashes, and Unicode ellipsis.

Detect AI-Generated Text

Want to check if text contains AI fingerprints before cleaning? Our AI Detector scans for zero-width spaces and 9 other categories of hidden markers with a 0-100 confidence score.