Data Masking & Anonymization Tool | Browser-Based Data Obfuscation for AI

How to use: Paste sensitive data → Click Analyze to detect 40+ PII types → Add detected items to mapping with appropriate prefixes | OR → SELECT any text to add custom words manually

Input (Your sensitive data)

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Output (Anonymized data)

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Selected:

Statistics

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PII Detected
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Mappings
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PII Types

Mapping

History:

Import

Word/Phrase	Token
No mappings yet. Add words above or select text from input.

⌨️ Keyboard Shortcuts

Analyze input text

Ctrl Enter

Undo mapping change

Ctrl Z

Redo mapping change

Ctrl Shift Z

Focus mapping search

Ctrl K

Toggle keyboard shortcuts

Close this dialog

Esc

Key Features of This Data Obfuscation Tool

100% Local & Private

All processing happens in your browser. Your sensitive data never leaves your device. True privacy-first data anonymization with zero server-side breach risk.

Built for AI Workflows

Designed for LLM interactions. Data masking techniques preserve sentence structure, enabling you to encode prompts and decode AI responses seamlessly.

Automated & Instant

Automated data anonymization intelligently detects repeated patterns, saving hours of manual work. Process thousands of lines in seconds.

Encode & Decode

Bidirectional workflow support. Sanitize data for prompts, then decode AI responses to restore original values. Reversible data obfuscation at its finest.

Free & No Setup

Completely free data masking tool. No sign-up, no installation, no limits. Open the page and start sanitizing instantly.

Reusable Mappings

Export sanitization rules as JSON. Share with your team to enforce consistent data anonymization methods across projects.

Frequently Asked Questions

What is data masking?

Data masking is a security technique that creates a structurally similar but inauthentic version of sensitive data. It protects information while providing a functional alternative for use cases like training, demos, or testing. This tool provides dynamic data masking capabilities directly in your browser.

What is data anonymization?

Data anonymization removes or encrypts personally identifiable information (PII) from datasets so individuals remain anonymous. Critical for privacy compliance (GDPR) and safe data sharing. This tool serves as free data anonymization software you can use instantly.

How is this different from other data masking tools?

Most data masking tools are complex, expensive, and require server uploads. This tool is unique: 100% browser-based (data stays with you), free, and specifically designed for modern AI workflows with bidirectional encoding/decoding support.

What are data masking techniques and examples?

Common data masking techniques include tokenization, generalization, pseudonymization, and data obfuscation. This tool uses intelligent pattern detection to replace sensitive data with human-readable tokens. Use this as data anonymization software for securing prompts, logs, and documents.

What is data masking vs tokenization?

Data masking replaces sensitive data with realistic but fake values, while tokenization substitutes data with unique tokens. This tool combines both approaches, creating human-readable tokens that maintain context for AI analysis while protecting original values.

Can I use this for automated data anonymization?

Yes. This tool provides automated data anonymization by intelligently detecting repeated patterns in your text. Simply paste your content, click Analyze, and the tool will identify sensitive patterns for instant anonymization, no manual configuration required.