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
Hidden Character Detector for Text
Expose non-printing Unicode characters and zero-width artifacts across your AI drafts. Review clear residue lists to maintain clean copy in every file.
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
Hidden Character Inspection in Action
See how non-printing code points 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
Character Inspection vs. Sentence Restructuring
Expose non-printing Unicode characters and zero-width artifacts across your AI drafts. Review clear residue lists to maintain clean copy in every file.
1. Character-Level Inspection
Exposes 60+ non-printing Unicode code points and markdown tokens. 100% free and local.
2. Sentence-Level Restructuring
Restructures repetitive phrasing and improves natural flow 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 Hidden Characters in 3 Steps
- 01
Step 1: Paste Your Draft
Paste your text to scan for 60+ hidden Unicode characters immediately.
- 02
Step 2: Inspect Residue Counts
Review the exact breakdown of zero-width spaces, joiners, and formatting marks.
- 03
Step 3: Strip Characters Free
Click Clean to remove hidden characters locally, or use Pro credits to rephrase copy.
Features
Detector 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
Expose and Remove Hidden Characters in Seconds
01
Non-printing Unicode characters lurk silently in drafts copied from AI chatbots and rich-text editors. These hidden bytes break string matching, cause irregular text selection, and corrupt database fields.
02
Clean Paste AI's Hidden Character Detector exposes every non-printing code point in your text, providing a clear list of findings and instant one-click sanitization.
03
All scanning executes locally inside your web browser, ensuring complete privacy for your documents.
04
Optional Pro rewrite provides meaning-preserving sentence restructuring when drafts require editorial polish.
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 It Is Used
01
Investigating Layout Bugs
Expose invisible byte order marks and zero-width spaces that cause unexpected visual gaps in web layouts.
Open the tool →
02
String Comparison Debugging
Find out why two seemingly identical strings fail programmatic equality checks by exposing hidden characters.
Open the tool →
03
Publishing & Print Layouts
Scan manuscript text for non-printing characters that cause typography errors in InDesign or Word.
Open the tool →
04
OCR & Scanned PDF Cleanup
Detect soft hyphens and broken formatting marks left behind when copying text from scanned PDF documents.
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 Rewriting
Inspect and clean hidden characters free forever locally.
View Pricing PlansReporting Transparency
This tool provides an itemized character inventory and does not calculate AI probability scores.
FAQ
Hidden Character Detector for Text Frequently Asked Questions
What causes hidden characters in text drafts?+
Web UIs, text formatting engines, and AI chat interfaces insert non-printing Unicode characters during text rendering.
Does this tool calculate an AI detection score?+
No. It provides a deterministic character count rather than a probabilistic score.
Is my text private during detection?+
Yes. All detection logic executes locally within your browser with zero data retention.
Will cleaning remove hidden characters from code?+
Yes. It purges zero-width spaces from code comments and strings to prevent compiler errors.
How does Pro rewriting work?+
Pro rewriting evaluates paragraph context to rephrase stiff sentence structures while preserving meaning.
Does this guarantee passing third-party AI detectors?+
No. Character cleaning restores typography and does not claim detector bypass.
About
Focused text hygiene for the AI era
Optional Pro rewrite provides meaning-preserving sentence restructuring when drafts require editorial polish.
Detect Hidden Characters Now
Expose non-printing Unicode characters and zero-width artifacts across your AI drafts. Review clear residue lists to maintain clean copy in every file.