Included in the scan report
- 60 invisible Unicode code points, including zero-width spaces and BOM
- U+202F narrow no-break spaces commonly copied from ChatGPT
- Raw Markdown symbols, asterisks, and code fences left on the clipboard
Invisible Character Detector and Counter
Detect zero-width spaces, joiners, and hidden Unicode characters inside your clipboard text. View exact residue counts to verify full text hygiene.
0 characters · 0 words
Clean paste fromClaudeChatGPTGeminiDocsCMSEmail
What our residue detector reports — and what it cannot see
The report provides a deterministic character inventory, not a probabilistic AI score. Use it to verify text hygiene before publishing.
Outside the scope of this scan
- No probabilistic AI detection score or percentage
- Cannot detect Claude's official statistical sampling mark or SynthID
- Does not certify text for third-party automated writing checkers
See the difference
Detector Report Example
See an exact inventory of hidden characters discovered in a raw text snippet.
Raw AI Paste4 hidden characters · Markdown tags
Here’s the summary: **Section 1** - Item A with narrow space > Note: verify carefully
Cleaned TextPristine plain text ready for docs
Here's the summary: Section 1 • Item A with narrow space Note: verify carefully
Why Clean Paste Matters
What the Detector Scans vs. What Is Outside Scope
Detect zero-width spaces, joiners, and hidden Unicode characters inside your clipboard text. View exact residue counts to verify full text hygiene.
1. Inspectable Unicode & Formatting Residue
60+ invisible Unicode code points, zero-width joiners, U+202F narrow spaces, and markdown tokens. Scanned 100% locally.
2. Proprietary Model Watermarks & Classifier Scores
Claude official statistical sampling marks, SynthID, and probability percentages are outside character scans.
100% Local In-Browser Execution
Our invisible character and markdown cleaners run directly inside your browser. No private text is ever uploaded for free cleaning.
How It Works
How to Detect and Clean Invisible Characters in 3 Steps
- 01
Step 1: Paste Text for Inspection
Paste your text to immediately scan against 60+ known invisible code points.
- 02
Step 2: Review Itemized Residue Counts
See a clear list of every zero-width character, non-breaking space, or formatting artifact discovered.
- 03
Step 3: Strip Characters or Rephrase
Click Clean to remove all detected characters instantly, or use Pro credits for semantic rewriting.
Features
Detector Capabilities
Invisible Character Detection
FreeScan and strip 60+ non-printing Unicode code points, joiners, and ghost spaces locally in your browser.
Markdown Stripper
FreeFlatten raw headings, bold asterisks, blockquotes, and code fences into clean plain text for publishing.
Text Watermark Remover
ProReconstruct draft phrasing using Pro semantic rewriting when watermarks are embedded directly in word choice.
AI Humanizer
ProRefine stiff transition formulas and mechanical sentence pacing into organic, reader-friendly prose.
Definition
Invisible Character Detection with Exact Residue Breakdown
01
Hidden Unicode characters—such as U+200B zero-width spaces and U+200D joiners—often hide inside copied text. Because they are non-printing, they remain invisible in standard editors while silently breaking database indexes, code strings, and search tags.
02
Clean Paste AI's Invisible Character Detector provides an instant, transparent audit of your clipboard text. It catalogs exact code points found so you know precisely what is hiding in your document.
03
The tool does NOT generate an arbitrary AI probability percentage. It reports deterministic character counts so you can verify typography hygiene before publishing.
04
Clean all detected anomalies with one click, or use Pro rewrite if your draft requires full sentence reconstruction.
Technical Sources
How the Three AI Output Traces Differ
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
Where Character Detection Matters
01
Pre-Publishing Text Audits
Audit draft copy for 60+ invisible Unicode code points, zero-width spaces, and soft hyphens before publishing.
Open the tool →
02
Codebase & Script Hygiene
Detect invisible characters accidentally pasted into code files, strings, and configuration variables.
Open the tool →
03
Search Engine Optimization
Ensure titles, H1 tags, and meta descriptions contain zero hidden characters that could affect search crawler parsing.
Open the tool →
04
Document Formatting QA
Identify ghost characters that cause mysterious line wraps, text selection gaps, or spacing bugs.
Open the tool →Testimonials
What writers and editors say
“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
Platform-Specific Cleaning Guides
Explore dedicated walkthroughs for cleaning output from specific AI platforms.
Clean Paste Utility for AI Copy
Fix messy clipboard output by stripping zero-width artifacts, broken tags, and odd line breaks instantly in your browser.
Clean Paste →Paste Clean Workflow for Clean Text
Eliminate unwanted zero-width characters and odd clipboard formatting before sharing documents. Review full residue counts to maintain spotless text.
Paste Clean →Clean Text Tool for Pure AI Output
Remove hidden Unicode artifacts and awkward markup before pasting into email or office editors. Get spotless paragraphs with detailed character counts.
Clean Text →Pricing
Free Local Inspection & Pro Rewrite Credits
Scanning and cleaning invisible characters is always 100% free locally in your browser.
View Pricing PlansHonest Reporting Boundaries
This tool is a character-level inspection utility. It does not calculate probabilistic AI detection scores or certify text for third-party automated checkers.
FAQ
Invisible Character Detector and Counter Frequently Asked Questions
What does the Invisible Character Detector actually detect?+
It detects 60+ distinct non-printing Unicode characters, including zero-width spaces (U+200B), zero-width joiners (U+200D), narrow no-break spaces (U+202F), and byte order marks (U+FEFF).
Does this detector give an AI probability score?+
No. This tool provides a deterministic character inventory, not a probabilistic AI percentage or detector score.
Is my text uploaded or stored during inspection?+
No. All inspection logic runs 100% locally in your web browser using JavaScript.
Can this detector find Claude's official statistical watermark?+
No. Claude's official watermark is a statistical bias in word choice and contains no hidden characters. It cannot be detected by character scanners.
How do I remove the detected characters?+
Click the Clean button to strip all detected invisible characters instantly in your browser for free.
Can I use this for source code files?+
Yes. It highlights non-printing characters that cause compiler and syntax errors in programming languages.
About
Focused text hygiene for the AI era
Clean all detected anomalies with one click, or use Pro rewrite if your draft requires full sentence reconstruction.
Detect Invisible Characters Now
Detect zero-width spaces, joiners, and hidden Unicode characters inside your clipboard text. View exact residue counts to verify full text hygiene.