Listed in the report
- 60 invisible Unicode code points, including zero-width spaces and BOM
- U+202F narrow no-break spaces common in ChatGPT copy-paste
- Raw Markdown hashes, asterisks, and code fences left on the clipboard
Inspect Unicode & Paste Residue
Inspect and list 60 invisible Unicode characters, U+202F narrow spaces, and markdown formatting artifacts in pasted text with transparent, honest reporting.
0 characters · 0 words
Works with paste fromClaudeChatGPTGeminiDocsCMSEmail
What this detector lists — and what it cannot see
The report is a character inventory, not an authorship score. Use it to inspect residue before you clean or rewrite.
Outside this scan
- No AI-probability percentage or classifier score
- Cannot verify Claude’s official statistical sampling mark or SynthID
- Does not score or certify text for third-party writing checkers
See it in action
How AI Text Watermark Detection Works
Understand the difference between verifiable physical Unicode residue and private statistical sampling watermarks.
Before3 hidden · Markdown noise
Sure! Here’s a summary — **Key points** - First item > Note: important
AfterVisible text intact
Sure! Here's a summary — Key points • First item Note: important
Why
Two Categories of AI Artifacts: Observable Characters vs. Proprietary Watermarks
Inspect and list 60 invisible Unicode characters, U+202F narrow spaces, and markdown formatting artifacts in pasted text with transparent, honest reporting.
1. Observable Unicode & Formatting Artifacts
Physical non-printing characters, U+202F narrow spaces, zero-width delimiters, and markdown tokens left on your clipboard. Our detector lists these artifacts with exact code points and positions for immediate local cleanup.
2. Cryptographic & Statistical Model Watermarks
Proprietary token distribution biases embedded during model sampling (such as Claude's 2026 watermark). These contain no hidden characters and cannot be detected without provider-held private keys.
Privacy first
Invisible-character and Markdown cleaning run locally in your browser. We don’t store Free-tool text.
How
How to Inspect Text for AI Watermarks and Artifacts in 3 Steps
- 01
Step 1: Paste Text for Instant Inspection
Paste your text into the workspace to scan for 60 invisible Unicode code points, U+202F spaces, and markdown formatting syntax.
- 02
Step 2: Review Detailed Code Point Findings
Inspect the generated inventory of detected characters, complete with Unicode hex values, character names, and exact string offsets.
- 03
Step 3: Clean Free or Restructure with Pro
Strip detected characters instantly using our free local cleaning tools, or switch to Pro semantic rewriting to reconstruct repetitive sentence structures.
Features
Core AI Text Watermark Detector Features
Invisible character detection
FreeDetects zero-width spaces, NNBSP, BOM, directional marks and 60+ other invisible code points without rewriting your words.
Markdown cleaner
FreeStrip headings, lists, quotes, and emphasis markers into plain text ready for CMS and editorial review.
Text watermark remover
ProPro rewrite regenerates meaning-preserving text when a watermark is baked into wording — not just hidden Unicode.
AI Humanizer
ProRewrite AI flavor into more natural cadence. No tool can guarantee detector bypass; results vary.
Definition
Transparent Text Inspection: Demystifying AI Watermarks, Unicode Artifacts, and Detection Limits
01
When analyzing text copied from AI assistants, confusion often arises between physical copy-paste artifacts and proprietary generative watermarks. Web chat interfaces regularly leave behind non-printing Unicode characters—such as zero-width spaces (U+200B), narrow no-break spaces (U+202F), and raw Markdown syntax—in the system clipboard. The AI text watermark detector scans your text locally, cataloging these deterministic formatting remnants with exact character offsets and hex identifiers.
02
We take an honest, engineering-first approach to text analysis: this detector lists observable physical characters and formatting syntax rather than generating arbitrary AI percentage scores. Many commercial detectors claim to calculate AI probability using statistical heuristics, but these models suffer from high false-positive rates and cannot prove origin. Our tool provides concrete, verifiable data on what is actually present inside your text string.
03
It is essential to understand that this detector cannot verify cryptographic statistical watermarks, such as Anthropic's August 2026 Claude text watermark or Google SynthID. These official technologies embed mathematical biases into token probability distributions during generation without inserting any hidden characters. Verification of statistical watermarks requires private cryptographic keys held exclusively by the respective model providers, which are not accessible via public APIs.
04
After inspecting your draft with this detector, you can seamlessly clean identified artifacts using our free invisible character remover and markdown cleaner tabs. If your content requires phrasing adjustments or rhythm improvements beyond surface formatting, our Pro semantic rewrite engine provides meaning-preserving sentence reconstruction.
Sources
How the three paste traces differ
Hidden Unicode, Markdown residue, and Claude’s official statistical watermark are three mechanisms. This page cites the public specs; it does not claim detector bypass.
| Mechanism | What it is | What this site does |
|---|---|---|
| Invisible Unicode | Zero-width and format code points (including U+200B and U+202F) that can ride along in a paste. | Free local scan and delete. Does not rewrite sentences. |
| Markdown / rich-text residue | Hashes, fences, emphasis markers, and copied rich-text spacing. | Free local strip to plain text. |
| Statistical wording watermark | A sampling pattern in word choice. Official Claude text watermarks add no hidden characters. | Pro meaning-preserving rewrite. Not a detector score, not a guarantee. |
“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 tokens follow the CommonMark specification: CommonMark spec.
Use cases
Common Scenarios for Text Residue Detection
01
Inspect before you publish
AI Text Watermark Detector inventories Unicode and markdown residue. It does not output an AI-probability score.
Open the tool →
02
Editorial QA on pasted drafts
See which hidden marks are present, then decide whether to clean locally or leave the wording alone.
Open the tool →
03
Scope check for a client
Show what the report can list — and that Claude’s official sampling mark is outside this scan.
Open the tool →
04
Engineering paste reviews
Use the inventory when a parser fails, not as a substitute for a provider verification API.
Open the tool →Testimonials
What people say
“The free scan lists the code points. I clean the paste in the browser, then only use Pro if the wording itself needs a rewrite.”
Content ops
SEO & CMS
“Markdown from chat was breaking our editor. Stripping hashes and fences locally is the whole job — no file upload.”
Editorial
Publishing
“Hidden Unicode broke string equality in a parser. Character cleanup first; sentence rewrite is a different layer.”
Engineering
Docs & support
Tools
Model-specific watermark removers
Dedicated landing pages for the searches people actually type.
Invisible Character Remover
Strip 60 invisible Unicode characters, zero-width spaces, narrow non-breaking spaces, and hidden control marks from pasted text 100% locally in your browser.
Invisible Character Remover →Text Watermark Remover
Understand how generative AI embeds statistical wording watermarks, clean surface Unicode paste residue for free, and reconstruct wording with Pro rewriting.
Text Watermark Remover →Remove AI Watermark from Text
A comprehensive approach to cleaning hidden Unicode residue and restructuring statistical AI text watermarks.
Remove AI Watermark →Pricing
Free Local Detection & Pro Semantic Rewriting
Scanning and cataloging text residue is always 100% free in your browser, with Pro credits available for sentence restructuring.
See pricingStrict Detection Boundaries and Ethical Transparency
This tool detects only physical Unicode characters and markdown formatting residue. It does not provide AI probability scores, cannot detect Anthropic's statistical Claude watermark or Google SynthID, and does not claim to assist in evading academic integrity tools like Turnitin, GPTZero, or Pangram. Official model verification remains private to model creators.
FAQ
Inspect Unicode & Paste Residue Frequently asked questions
Does this AI text watermark detector provide an AI vs. Human percentage score?+
No. We do not generate speculative AI probability percentages. This detector provides a deterministic, transparent inventory of physical invisible Unicode code points, U+202F spaces, and markdown formatting syntax actually present in your text.
Can this detector detect Claude's official statistical watermark?+
No. Anthropic's August 2026 Claude text watermark embeds statistical token selection biases during generation without inserting hidden characters. Detecting it requires Anthropic's private cryptographic keys and verification API, which are not publicly available.
Can this tool detect Google SynthID or other statistical watermarks?+
No. SynthID and similar statistical watermarking technologies operate at the model sampling level without leaving hidden characters. They can only be validated through proprietary provider verification systems.
What exactly does this detector find in my text?+
The detector scans for 60 invisible Unicode code points (including zero-width spaces U+200B, ZWNJ, BOM, and U+202F narrow spaces) as well as unrendered markdown formatting markers like bold asterisks and heading hashes.
How do I remove the characters found by the detector?+
You can remove all detected Unicode artifacts instantly and for free by switching to the Invisible Characters tab or Markdown cleaner tab, which strip residue 100% locally in your browser.
Is my pasted text kept private during detection?+
Yes. All character scanning and format detection runs entirely inside your browser's local memory. Your text is never transmitted to our servers or stored in any database.
About us
A focused tool for cleaner AI paste
After inspecting your draft with this detector, you can seamlessly clean identified artifacts using our free invisible character remover and markdown cleaner tabs. If your content requires phrasing adjustments or rhythm improvements beyond surface formatting, our Pro semantic rewrite engine provides meaning-preserving sentence reconstruction.
Inspect Your Text for AI Residue Now
Inspect and list 60 invisible Unicode characters, U+202F narrow spaces, and markdown formatting artifacts in pasted text with transparent, honest reporting.