Strip 60 invisible Unicode characters, zero-width spaces, narrow non-breaking spaces, and hidden control marks from pasted text 100% locally in your browser.
These code points show up most often in AI chat pastes, docs, and web copy. The full scan covers 60 characters; this table is the short list.
| Code | Name | Why it breaks pastes |
|---|---|---|
| U+200B | Zero Width Space | Invisible separator; breaks word counts, search and URLs. Common AI/copy artifact. |
| U+200C | Zero Width Non-Joiner | Invisible; controls ligature joining. Often unintended residue. |
| U+200D | Zero Width Joiner | Invisible; joins glyphs/emoji. Can be watermark residue in plain text. |
| U+FEFF | Zero Width No-Break Space (BOM) | Byte order mark / invisible; corrupts leading text and parsing. |
| U+00A0 | No-Break Space | Looks like a space but blocks line breaks; breaks search matching. |
| U+202F | Narrow No-Break Space (NNBSP) | The main 'ChatGPT o3/o4-mini' artifact. Looks like a space, different code point. |
| U+00AD | Soft Hyphen | Invisible unless line wraps; splits words for search. |
| U+202E | Right-To-Left Override | Bidi override; strong spoofing risk. |
The live scanner still checks the full set of 60 code points, including bidi controls and variation selectors.
See it in action
Learn how hidden non-printing code points enter copied text and how client-side cleaning restores clean plain text.
Sure! Here’s a summary — **Key points** - First item > Note: important
Sure! Here's a summary — Key points • First item Note: important
Why
Strip 60 invisible Unicode characters, zero-width spaces, narrow non-breaking spaces, and hidden control marks from pasted text 100% locally in your browser.
Physical non-printing characters such as zero-width spaces (U+200B), directional marks, and U+202F narrow spaces injected during copy-paste. These deterministic artifacts are stripped instantly and for free directly in your browser.
Underlying sentence structures, formulaic transitions, and token probability distributions generated by AI models. Removing invisible characters does not change wording; modifying sentence cadence requires semantic rewriting through our Pro engine.
Invisible-character and Markdown cleaning run locally in your browser. We don’t store Free-tool text.
How
Paste your text from any AI chat interface, document, or code editor into the workspace. The tool scans immediately for 60 invisible Unicode code points.
Click Clean to purge all zero-width spaces, U+202F narrow spaces, and hidden control marks for free in your browser with zero latency.
Copy your sanitized text for publishing, coding, or CMS entry. If your draft also requires stylistic polish or vocabulary restructuring, send it to our Pro rewrite engine.
Features
Detects zero-width spaces, NNBSP, BOM, directional marks and 60+ other invisible code points without rewriting your words.
Strip headings, lists, quotes, and emphasis markers into plain text ready for CMS and editorial review.
Pro rewrite regenerates meaning-preserving text when a watermark is baked into wording — not just hidden Unicode.
Rewrite AI flavor into more natural cadence. No tool can guarantee detector bypass; results vary.
Definition
When copying text from AI chatbots, rich web applications, code repositories, or PDFs, invisible Unicode characters often tag along invisibly. These non-printing characters include zero-width spaces (U+200B), zero-width non-joiners (U+200C), byte order marks (U+FEFF), bidirectional overrides (U+202E), and narrow no-break spaces (U+202F). While completely invisible on your screen, they silently corrupt database queries, distort string lengths, trigger validation errors in code, and create unexpected formatting bugs in content management systems.
Unlike generic text editors that conceal non-printing bytes, our invisible character remover parses your pasted string at the individual Unicode code point level. It isolates and purges 60 distinct invisible, control, and zero-width code points without altering your visible text, words, or intended line breaks. Processing takes place entirely within client-side JavaScript memory, guaranteeing absolute privacy for sensitive notes, proprietary source code, and confidential documents.
It is crucial to distinguish physical Unicode characters from model-level statistical watermarks. Chat interfaces like ChatGPT frequently inject narrow no-break spaces (U+202F) or formatting tags into clipboard buffers during copy operations, which this tool removes cleanly. In contrast, Claude's August 2026 official text watermark relies on statistical token sampling distributions and inserts zero hidden characters. Stripping invisible Unicode fixes copy-paste residue, but does not alter underlying word choice.
For complete text hygiene, use our AI text watermark detector page to inspect and list hidden characters before removal. Once your text is free of invisible Unicode, you can optionally use our Pro semantic rewrite to restructure repetitive AI phrasing and natural sentence rhythm.
Sources
Hidden Unicode, Markdown residue, and Claude’s official statistical watermark are three mechanisms. This page cites the public specs; it does not claim detector bypass.
| Mechanism | What it is | What this site does |
|---|---|---|
| Invisible Unicode | Zero-width and format code points (including U+200B and U+202F) that can ride along in a paste. | Free local scan and delete. Does not rewrite sentences. |
| Markdown / rich-text residue | Hashes, fences, emphasis markers, and copied rich-text spacing. | Free local strip to plain text. |
| Statistical wording watermark | A sampling pattern in word choice. Official Claude text watermarks add no hidden characters. | Pro meaning-preserving rewrite. Not a detector score, not a guarantee. |
“Nothing is added to the text and there are no hidden characters.”
“U+200B ZERO WIDTH SPACE is intended for line break control without displaying a visible space.”
Markdown tokens follow the CommonMark specification: CommonMark spec.
Use cases
Invisible Character Remover lists zero-width and BOM marks before they land in title or meta fields.
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Writers paste a clean-looking paragraph that still carries non-printing code points. The scan names them.
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Agencies clean clipboard residue in the browser so drafts never leave the device on the free pass.
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Docs and scripts break when U+200B sits inside a token. Strip the mark, keep the visible words.
Open the tool →Testimonials
“The free scan lists the code points. I clean the paste in the browser, then only use Pro if the wording itself needs a rewrite.”
Content ops
SEO & CMS
“Markdown from chat was breaking our editor. Stripping hashes and fences locally is the whole job — no file upload.”
Editorial
Publishing
“Hidden Unicode broke string equality in a parser. Character cleanup first; sentence rewrite is a different layer.”
Engineering
Docs & support
Tools
Dedicated landing pages for the searches people actually type.
Scan and purge 60 invisible Unicode code points, zero-width spaces, and non-printing control characters directly in your browser.
Remove Hidden Characters →Locate and remove U+200B zero-width spaces, ZWNJ, ZWJ, and invisible delimiters from text locally in your browser.
Zero-Width Space Remover →Inspect and list 60 invisible Unicode characters, U+202F narrow spaces, and markdown formatting artifacts in pasted text with transparent, honest reporting.
AI Watermark Detector →Pricing
Stripping invisible characters is always 100% free in your browser, with Pro rewrite credits available for semantic restructuring.
See pricingThe invisible character remover operates deterministically on 60 physical Unicode code points. However, removing hidden characters does not alter statistical word choice, bypass third-party AI detectors like Turnitin or GPTZero, or remove Anthropic's statistical sampling watermark. We provide transparent, honest utilities with zero misleading bypass claims.
FAQ
The tool detects and strips 60 invisible Unicode code points, including zero-width spaces (U+200B), zero-width non-joiners (U+200C), zero-width joiners (U+200D), byte order marks (U+FEFF), narrow no-break spaces (U+202F), and bidirectional formatting marks.
Web interfaces for ChatGPT often use narrow no-break spaces (U+202F) for typography and inline formatting. When copied to the clipboard, these non-standard spaces tag along and can cause layout glitches in strict text environments.
No. Removing invisible Unicode only cleans physical non-printing characters from your clipboard. Commercial AI detectors analyze statistical perplexity and word predictability, which are unaffected by character-level cleaning.
No. Anthropic's August 2026 text watermark uses statistical token sampling during generation and does not insert any hidden characters or zero-width bytes. Neutralizing statistical watermarks requires semantic sentence reconstruction.
No. The invisible character removal process executes entirely in your browser using client-side JavaScript. Your pasted text never leaves your device, ensuring complete data privacy.
The detector page inspects and lists every hidden code point and formatting artifact with character offsets. This remover allows you to strip all 60 invisible characters immediately in one click.
About us
For complete text hygiene, use our AI text watermark detector page to inspect and list hidden characters before removal. Once your text is free of invisible Unicode, you can optionally use our Pro semantic rewrite to restructure repetitive AI phrasing and natural sentence rhythm.
Strip 60 invisible Unicode characters, zero-width spaces, narrow non-breaking spaces, and hidden control marks from pasted text 100% locally in your browser.