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Detect Hidden Characters in Clipboard

Reveal secret zero-width spaces, soft hyphens, and Unicode noise in any copied snippet. Check exact residue counts to keep document layouts tidy.

0 characters · 0 words
Clean PastePaste CleanClean Text
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.

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

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 in Action

See how hidden characters are revealed and purged in seconds.

Detection in Action
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 Text Inspection

Reveal secret zero-width spaces, soft hyphens, and Unicode noise in any copied snippet. Check exact residue counts to keep document layouts tidy.

1. Hidden Character Cleansing

Identifies and deletes 60+ zero-width characters and markdown tokens. 100% free locally.

2. Sentence Flow Polish

Restructures rigid transitions and repetitive cadence 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

  1. 01

    Step 1: Paste Copied Snippet

    Paste your text to scan for 60+ invisible characters immediately.

  2. 02

    Step 2: Review Residue Breakdown

    Examine the detailed list of detected zero-width characters and spaces.

  3. 03

    Step 3: Strip Characters Free

    Click Clean to remove all non-printing characters locally in milliseconds.

Features

Detection Highlights

Invisible Character Detection

Free

Scan and strip 60+ non-printing Unicode code points, joiners, and ghost spaces locally in your browser.

Markdown Stripper

Free

Flatten raw headings, bold asterisks, blockquotes, and code fences into clean plain text for publishing.

Text Watermark Remover

Pro

Reconstruct draft phrasing using Pro semantic rewriting when watermarks are embedded directly in word choice.

AI Humanizer

Pro

Refine stiff transition formulas and mechanical sentence pacing into organic, reader-friendly prose.

Definition

Reveal Hidden Characters Before They Break Layouts

01

Invisible zero-width spaces, soft hyphens, and non-breaking spaces often hitchhike on copied text. These hidden characters cause layout corruption in CMS fields, email marketing templates, and spreadsheets.

02

Clean Paste AI's Detect Hidden Characters tool reveals every non-printing artifact in milliseconds, providing an itemized report and one-click removal.

03

All detection occurs locally within your browser, ensuring complete confidentiality.

04

For drafts that also need sentence variety, Pro rewrite provides semantic restructuring.

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.

MechanismTechnical DescriptionHow Clean Paste AI Handles It
Invisible Unicode ArtifactsZero-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 NoiseHeading hashes, bold asterisks, code fences, and bracketed links.Free local in-browser stripping to clean plain text.
Statistical Sampling WatermarksMathematical 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

Instant Clipboard Inspection
01

Instant Clipboard Inspection

Paste any copied snippet to immediately reveal hidden zero-width joiners and non-breaking space codes.

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Email Subject Line Testing
02

Email Subject Line Testing

Check email subject lines for hidden characters that trigger spam filters or display oddly on mobile devices.

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Ad Headline Verification
03

Ad Headline Verification

Verify that Google Ads and Facebook Ads headlines contain only valid visible characters within strict limits.

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Markdown Source Checking
04

Markdown Source Checking

Ensure raw markdown documentation does not contain hidden Unicode artifacts that break static site builds.

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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 →
All Clean Paste Tools →

Pricing

Free Local Detection & Pro Rewriting

Detect and clean hidden characters free forever locally.

View Pricing Plans

Honest Scope

This tool inspects deterministic character artifacts and does not calculate probabilistic AI detection scores.

FAQ

Detect Hidden Characters in Clipboard Frequently Asked Questions

Why should I check for hidden characters?+

Hidden characters disrupt word wrapping, cause search failures, and corrupt spreadsheet formulas.

Is this detector private?+

Yes. All scanning runs entirely inside your browser memory with zero network uploads.

Will cleaning delete my punctuation?+

No. Standard punctuation and paragraph breaks are preserved while invisible characters are removed.

Can it detect U+202F narrow spaces?+

Yes. It flags U+202F narrow no-break spaces and converts them to standard spaces.

How does Pro rewriting work?+

Pro rewriting rephrases sentences to improve cadence while preserving factual points.

Does this guarantee passing AI checkers?+

No. Character cleaning restores typography and does not claim detector bypass.

About

Focused text hygiene for the AI era

For drafts that also need sentence variety, Pro rewrite provides semantic restructuring.

Detect Hidden Characters Now

Reveal secret zero-width spaces, soft hyphens, and Unicode noise in any copied snippet. Check exact residue counts to keep document layouts tidy.

Reveal Hidden Characters FreeReconstruct with Pro