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
Detector Invisible Characters Online
Find zero-width joiners and secret Unicode markers hiding inside your pasted passages. Inspect complete residue counts to keep your writing clean.
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
Detection Example
See how invisible characters are cataloged and removed in seconds.
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
Two Levels of Inspection
Find zero-width joiners and secret Unicode markers hiding inside your pasted passages. Inspect complete residue counts to keep your writing clean.
1. Non-Printing Character Detection
Exposes 60+ zero-width characters, narrow spaces, and formatting artifacts. Free and local.
2. Wording Pattern Optimization
Restructures predictable sentence patterns and transition templates via Pro rewrite.
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 Characters
- 01
Step 1: Paste Text for Scanning
Paste your draft to immediately scan for 60+ non-printing Unicode characters.
- 02
Step 2: Review Itemized Counts
See exact counts of zero-width joiners, non-breaking spaces, and formatting tags.
- 03
Step 3: Strip Characters Free
Click Clean to purge all hidden characters, or use Pro credits to polish text flow.
Features
Inspection Features
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
Detect and Eliminate Invisible Characters in Your Browser
01
Pasted text from AI assistants and web pages frequently carries non-printing Unicode characters. These hidden markers interfere with character count limits, cause search queries to fail, and disrupt layout rendering.
02
Clean Paste AI's Detector Invisible Characters utility highlights every non-printing code point lurking in your text, giving you transparent counts and one-click removal.
03
All detection logic runs locally inside your browser, ensuring that confidential drafts remain completely private.
04
If your draft also requires vocabulary enhancements, Pro rewrite allows you to rephrase sentences seamlessly.
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
Common Use Cases
01
Web Form Validation QA
Find hidden zero-width spaces in form inputs before they cause database uniqueness constraint violations.
Open the tool →
02
Content Migration Inspection
Scan legacy articles during CMS migrations to identify and clean corrupted Unicode characters in bulk.
Open the tool →
03
Translation Memory Cleanliness
Detect invisible control characters in translation source files before importing into localization platforms.
Open the tool →
04
Financial & Table Data Checks
Ensure numerical strings in reports contain no non-printing characters that could corrupt financial models.
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 Detection & Pro Rewriting
Scanning and cleaning invisible characters is always 100% free locally.
View Pricing PlansScope & Boundaries
This tool inspects deterministic Unicode characters and does not calculate probabilistic AI detection percentages.
FAQ
Detector Invisible Characters Online Frequently Asked Questions
Why do invisible characters appear in pasted text?+
Web UIs and text editors insert invisible characters for line breaking, word joining, and layout formatting.
Does this detector calculate an AI score?+
No. It provides a deterministic character count rather than a probabilistic AI percentage.
Is my text uploaded to a server?+
No. Detection runs 100% locally in your web browser with zero server uploads.
Can it clean U+202F narrow spaces?+
Yes. It flags U+202F narrow no-break spaces and normalizes them to standard spaces.
How many words can I scan for free?+
Free in-browser character scanning is unlimited with no caps and no account needed.
Does this tool bypass Turnitin or GPTZero?+
No. Character detection restores typography and does not claim detector bypass.
About
Focused text hygiene for the AI era
If your draft also requires vocabulary enhancements, Pro rewrite allows you to rephrase sentences seamlessly.
Detect Invisible Characters
Find zero-width joiners and secret Unicode markers hiding inside your pasted passages. Inspect complete residue counts to keep your writing clean.