1. Zero-Width Tokens & Formatting Tags
Non-printing Unicode characters, narrow spaces, and markdown tokens. Cleared locally for free.
Purge zero-width tokens, strange spacing, and rogue formatting from your AI-assisted writing. Check detailed residue breakdown counts before sharing.
These code points appear most frequently in AI chat pastes and document exports. The full scan covers 60 characters; here are the common offenders.
| Code | Character 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. |
Our in-browser scanner checks the full catalog of 60 invisible code points, including directional controls and zero-width joiners.
See the difference
See how digital artifacts are purged for pristine document formatting.

Here’s the summary: **Section 1** - Item A with narrow space > Note: verify carefully
Here's the summary: Section 1 • Item A with narrow space Note: verify carefully
Why Clean Paste Matters
Purge zero-width tokens, strange spacing, and rogue formatting from your AI-assisted writing. Check detailed residue breakdown counts before sharing.
Non-printing Unicode characters, narrow spaces, and markdown tokens. Cleared locally for free.
Predictable transition markers and uniform sentence structures. Refined via Pro rewrite.
Our invisible character and markdown cleaners run directly inside your browser. No private text is ever uploaded for free cleaning.
How It Works
Paste your text to scan for 60+ invisible characters and markdown tags instantly.
Click Clean to remove non-printing artifacts and normalize spacing in your browser.
Copy your clean text, or use Pro credits to enhance sentence flow.
Features
Scan and strip 60+ non-printing Unicode code points, joiners, and ghost spaces locally in your browser.
Flatten raw headings, bold asterisks, blockquotes, and code fences into clean plain text for publishing.
Reconstruct draft phrasing using Pro semantic rewriting when watermarks are embedded directly in word choice.
Refine stiff transition formulas and mechanical sentence pacing into organic, reader-friendly prose.
Definition
When drafting content with AI tools, hidden zero-width tokens and erratic whitespace can quietly corrupt your publishing pipeline. These subtle artifacts cause layout shifts in CMS templates and indexing errors in databases.
Clean Paste AI's AI Cleaner Text utility delivers an immediate in-browser inspection and sanitation workspace. Clean your text in milliseconds without uploading drafts to remote servers.
Review transparent counts of detected artifacts before exporting clean, uncorrupted plain text.
Optional Pro rewrites provide semantic restructuring for drafts that sound repetitive or robotic.
Technical Sources
Invisible Unicode artifacts, Markdown residue, and official statistical watermarks are three distinct mechanisms with different solutions.
| Mechanism | Technical Description | How Clean Paste AI Handles It |
|---|---|---|
| Invisible Unicode Artifacts | Zero-width spaces (U+200B), narrow no-break spaces (U+202F), and format code points copied from web UIs. | Free local in-browser scan and deletion. Visible words remain unchanged. |
| Markdown & Formatting Noise | Heading hashes, bold asterisks, code fences, and bracketed links. | Free local in-browser stripping to clean plain text. |
| Statistical Sampling Watermarks | Mathematical bias in token selection probability during model generation (e.g., Claude's official watermark). | Pro semantic sentence reconstruction. Rebuilds phrasing while keeping meaning intact. |
“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 syntax adheres to the CommonMark specification: CommonMark Specification.
Use Cases

Remove unwanted markdown brackets and hidden spaces from video scripts before loading into teleprompter apps.
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Sanitize batch AI product descriptions to maintain uniform character encoding across e-commerce storefronts.
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Purge non-printing characters from draft clauses before formal legal review and redlining in Word.
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Clean AI-synthesized meeting notes before archiving into corporate intranets.
Open the tool →Testimonials
“Pasting from AI into Google Docs used to create weird font glitches. Clean Paste AI strips the zero-width spaces in one click before I paste.”
Publishing Editor
Digital Media
“The Markdown stripper is essential for our knowledge base. It turns chatty markdown output into pristine plain text without file uploads.”
Technical Writer
SaaS Documentation
“I love that the Unicode cleaner runs locally in my browser. Confidential client drafts stay private, and the Pro rewrite helps when cadence is stiff.”
Copywriter
Content Agency
Tools
Explore dedicated walkthroughs for cleaning output from specific AI platforms.
Fix messy clipboard output by stripping zero-width artifacts, broken tags, and odd line breaks instantly in your browser.
Clean Paste →Eliminate unwanted zero-width characters and odd clipboard formatting before sharing documents. Review full residue counts to maintain spotless text.
Paste Clean →Remove hidden Unicode artifacts and awkward markup before pasting into email or office editors. Get spotless paragraphs with detailed character counts.
Clean Text →Pricing
Clean formatting free locally forever, with Pro credits available for wording changes.
View Pricing PlansWe clean character artifacts and provide semantic rewrites; we do not promise detector bypass.
FAQ
It strips zero-width spaces, narrow no-break spaces, soft hyphens, BOM markers, and raw markdown syntax like hashes and asterisks.
No. The free cleaner executes entirely inside your browser using client-side JavaScript.
Free cleaning removes formatting without altering a single word. Pro rewriting restructures sentences.
Yes. It works with output from ChatGPT, Claude, Gemini, Copilot, and any other text generation tool.
It analyzes paragraph context to vary sentence structures and eliminate repetitive AI transitional phrases.
No. We focus on text hygiene and human readability without making deceptive evasion claims.
About
Optional Pro rewrites provide semantic restructuring for drafts that sound repetitive or robotic.
Purge zero-width tokens, strange spacing, and rogue formatting from your AI-assisted writing. Check detailed residue breakdown counts before sharing.