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 Scanner for Text Files
Highlight hidden zero-width tokens and invisible unicode symbols across your text. Review an exact residue breakdown before exporting clean plain copies.
0 characters · 0 words
Cleans raw outputs 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
Text hygiene preview
Invisible Character Scanner: Breakdown Preview
See how hidden Unicode codepoints are highlighted with exact counts.
Raw AI draft4 hidden unicode · markdown clutter
Here is your article overview — **Core takeaways** - First point included > Note: verify numbers
Cleaned draftPristine plain typography
Here is your article overview — Core takeaways • First point included Note: verify numbers
Hygiene advantages
Two Scanner Output Modes
Highlight hidden zero-width tokens and invisible unicode symbols across your text. Review an exact residue breakdown before exporting clean plain copies.
1. Residue Inventory Breakdown
Lists exact counts of all non-printing Unicode codepoints found in the text buffer.
2. Instant One-Click Sanitization
Purges all detected invisible codepoints and normalizes whitespace directly in your browser.
Client-side privacy
Invisible character removal and Markdown stripping execute 100% locally in your browser session. Your draft text is never transmitted to our servers during free scans.
Workflow
How to Scan for Invisible Characters
- 01
Step 1: Paste Text for Inspection
Insert your draft into the scanner to initiate an instant character-by-character audit.
- 02
Step 2: Review Detected Residue
Examine the exact breakdown of invisible Unicode codepoints and hidden tags.
- 03
Step 3: Strip and Export
Click Clean to remove all highlighted tokens and copy clean text to your clipboard.
Capabilities
Comprehensive Character Auditing
Invisible character cleaner
FreeEliminates zero-width spaces, ZWNJ, non-breaking spaces, and 60+ non-printing codepoints entirely inside your browser.
Markdown stripper
FreeFlattens bold stars, header hashes, blockquotes, and list indicators into uniform plain text ready for copy editors.
Text watermark remover
ProReconstructs entire sentence structures when models embed statistical sampling signatures into word choice rather than hidden tags.
AI Text Humanizer
ProSoftens formulaic phrasing and robotic sentence rhythm to create a fluid, authentic reading cadence.
Text Hygiene Concept
Invisible Character Scanner: Transparent Text Auditing for Digital Content
01
Before publishing important copy or committing code, understanding what hidden characters exist inside your draft is crucial. Many word processors silently mask invisible characters, leaving you unaware of formatting corruption.
02
Our Invisible Character Scanner inspects draft text against 60+ non-printing Unicode positions, highlighting the exact location and category of every detected character.
03
You receive a clear breakdown of Zero-Width Spaces, Non-Joiners, Byte Order Marks, and Directional Controls, rather than a vague probability score.
04
Once audited, a single click purges all detected artifacts, leaving you with clean, reliable plain text.
Technical Sources & References
Verified Documentation & Standards
Our text hygiene tools are built on official Unicode Consortium specifications and published AI watermarking research.
| Mechanism | What It Embeds | Effective Solution |
|---|---|---|
| Unicode / Paste Residue | Zero-width spaces, U+202F, non-printing codepoints | Free client-side scanner & stripper |
| Markdown Clutter | Raw asterisks, header hashes, blockquotes, code fences | Free Markdown cleaner |
| Statistical Token Sampling | Cryptographic token selection bias (Claude 2026) | Pro full-sentence reconstruction |
“"The watermark is applied by slightly biasing the choice of words during generation... A thorough rewrite that changes nearly every word removes the watermark."”
“"Format controls and invisible characters can disrupt string comparison, rendering, and text security if not properly sanitized."”
CommonMark specification for deterministic markdown syntax flattening. CommonMark 0.31 Specification.
Applications
Common Scanning Scenarios
01
Pre-Publishing Content Audits
Scan drafted blog articles for hidden formatting residue before editorial approval.
Open the tool →
02
Developer Codebase Inspections
Audit copied code snippets to eliminate hidden Unicode bytes before git commit.
Open the tool →
03
Localization File QA
Inspect translation strings across JSON and PO files to verify encoding hygiene.
Open the tool →
04
Academic Paper Formatting Verification
Scan manuscript drafts to ensure plain text consistency before journal submission.
Open the tool →Feedback
Trusted by editors and content creators
“The free scanner flagged six hidden Unicode bytes that were corrupting our CMS layout. Having a local tool to audit drafts before publishing saves our editorial team hours.”
Elena R.
Managing Editor, Digital Publishing
“Stripping chat markdown and weird spaces without uploading text to a third party is exactly what our compliance team needed. Fast, private, and dependable.”
Marcus T.
Content Operations Lead
“The distinction between Unicode residue and Claude's statistical sampling is refreshing. Free cleanup handles the formatting, and Pro rewrite takes care of cadence when needed.”
David K.
SEO & Content Strategist
Tools
Model-specific text cleaning guides
Targeted workflows for cleaning text generated by major AI platforms.
AI Hidden Character Detector for Documents
Discover hidden unicode bytes and zero-width spaces embedded in generated text. Audit your raw documents to ensure formatting cleanliness and stability.
AI Hidden Character Detector →Hidden AI Character Detector for Writers
Identify invisible zero-width tokens and weird whitespace sequences across your text. Clean up raw copy before sending files to printers or web layouts.
Hidden AI Character Detector →AI Text Watermark Checker for Hidden Tags
Check drafts for zero-width characters and invisible unicode tags without scores. Get an exact inventory of hidden characters to clean your text fast.
AI Text Watermark Checker →Pricing
Free Forever Scanner
Unlimited free scanning; credit packs for Pro sentence reconstruction.
View Pro PlansService Transparency
The scanner audits physical Unicode characters locally. It does not detect or remove statistical sampling watermarks without a Pro rewrite. We do not claim guaranteed bypass of AI detectors.
FAQ
Invisible Character Scanner for Text Files Frequently asked questions
How does the invisible character scanner work?+
It checks each character's Unicode codepoint against a database of 60+ known non-printing formatting characters.
Does the scanner show exact character counts?+
Yes. It displays the exact number of zero-width spaces, U+202F spaces, and control characters found.
Is my text uploaded when I scan it?+
No. The scanner runs entirely in your browser using client-side JavaScript.
Can the scanner detect Claude's statistical watermark?+
No. Claude's official watermark contains no hidden characters. It is a token sampling bias that requires a Pro rewrite to alter.
Can I scan source code files?+
Yes. You can paste code snippets to scan for invisible characters that cause compiler errors.
How do I remove the characters after scanning?+
Click the Clean & Fix Text button to strip all detected invisible characters instantly.
About AI Text Cleaner
Focused text hygiene for modern workflows
Once audited, a single click purges all detected artifacts, leaving you with clean, reliable plain text.
Audit Invisible Characters
Highlight hidden zero-width tokens and invisible unicode symbols across your text. Review an exact residue breakdown before exporting clean plain copies.