🛡️ Clipboard Inspector & Pastejacking Shield

Clipboard Inspector & Paste Security Shield

Inspect multi-MIME clipboard payloads (plain text, rich HTML, screenshot image paste), detect malicious Zero-Width characters or pastejacking traps, and purge sensitive data in 1 click.

Clipboard Permission:

📋

Paste Zone (Press Ctrl + V / Cmd + V)

Press Ctrl + V or Cmd + V anywhere on this page, or click 'Read Clipboard' above

Characters

Words

Lines

Payload Size

Detected MIME Types:

100% Client-Side Privacy

Pastejacking Reality

The Copy-Paste Trap: When an Innocent Terminal Command Hides Destructive Malware

Troubleshooting a server glitch on a developer blog, you innocently click "Copy" on a snippet reading "git status". But when pasting into your terminal, the buffer instantly injects a malicious remote bash script terminated by a hidden carriage return—executing destructively before your brain even registers the change. This is classic Pastejacking. Beyond malware traps, copied web text frequently conceals invisible Zero-Width tracking glyphs or bloated HTML spans that corrupt spreadsheets. This studio functions as an X-ray scanner for your system clipboard, dissecting every MIME layer and security threat before you paste.

How to Inspect and Sanitize Your Clipboard in 3 Steps

100% Client-Side security inspection with zero telemetry

Paste or Click Read

Press Ctrl + V (Cmd + V on macOS) anywhere on the page, or click "Read Clipboard" and grant browser permission.

Inspect Multi-MIME Layers

Toggle between Plain Text stats, raw HTML code vs rendered view, and inspect pasted screenshot images with exact byte sizes.

Scan Threats & Purge

Review security alerts for hidden Zero-Width traps or terminal hijacking; click "Purge Clipboard" to erase sensitive credentials.

Dangerous Clipboard Injections & Invisible Characters Cheat-Sheet

Understand common clipboard steganography, file spoofing tricks, and terminal traps

Threat / Anomaly	Codepoint / Syntax	Potential Security Risk	Detection & Countermeasure
Zero-Width Space	U+200B / U+FEFF	Steganographic text fingerprinting and source code compiler errors	Tool flags invisible glyphs and isolates raw positions
RTL Override Spoof	U+202E	Reverses text reading order to spoof dangerous .exe files as harmless .pdf	Immediate critical banner warning upon detection
Line-Break Hijack (Pastejacking)	CRLF / LF (Newline)	Hidden newline triggers automatic Enter key press when pasted into terminal	Scans for shell execution patterns and warns before execution
Bloated HTML Spans	text/html	Carries messy inline CSS and tags that break formatting in Word / Docs	Isolates HTML payload and offers 1-click clean text copy

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Pastejacking Shield

Automatically detects terminal trap scripts and hidden execution newlines before you paste into your shell.

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Direct Image Paste

Renders raw bitmap/PNG blobs from Snipping Tool or PrintScreen with exact dimensions and 1-click download.

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Multi-MIME Separation

Inspect rendered rich HTML alongside raw tags to eliminate bloated formatting before pasting into docs.

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1-Click Clipboard Purge

Instantly overwrites system memory with an empty buffer to securely scrub passwords and sensitive payment credentials.

Frequently Asked Questions About Clipboard Security & Inspection

Technical insights into W3C Async Clipboard API, pastejacking mechanics, and local privacy guarantees

1. What is Pastejacking and why is it dangerous for developers? ▼

Pastejacking occurs when a malicious website uses JavaScript clipboard overrides to swap benign-looking text with malicious shell commands accompanied by an implicit newline. Pasting into PowerShell or Bash triggers immediate command execution via the hidden Enter key before you can inspect or cancel it.

2. Why does the browser ask for permission when clicking "Read Clipboard"? ▼

System clipboards often hold sensitive secrets such as passwords, OTP tokens, or financial records. W3C security specifications require explicit user consent via clipboard-read permissions before any website can programmatically read system memory.

3. How does the "Purge Clipboard" button safeguard my credentials? ▼

Clicking "Purge Clipboard" immediately calls navigator.clipboard.writeText('') to overwrite system memory with an empty string, preventing subsequent apps or browser tabs from harvesting your previously copied credentials.

4. Does pasting screenshot images compress or reduce image quality? ▼

Zero compression occurs. The tool receives the original binary PNG blob directly from OS memory via the W3C ClipboardItem API, preserving 100% pixel fidelity and exact dimensions for instant PNG download.

5. Is my clipboard payload transmitted or stored on any server? ▼

100% absolute privacy. All MIME analysis, steganography checks, and image decoding execute locally inside your browser client memory. Zero data packets are sent over the network, providing complete confidentiality.

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