About the Tool

The Censor JSON tool helps users remove or hide sensitive information from JSON data structures. It works entirely in your web browser, ensuring that private information never leaves your device.

Key Benefits of Using This Tool

• 100% client-side processing with no data uploads
• Instant redaction of confidential fields
• Easy to use for developers and non-developers
• Protects privacy before sharing JSON logs or payloads
• Works on any device with a modern browser

Features

• Censor specific JSON keys
• Automatic email detection and masking
• Optional phone number redaction
• Custom mask values
• Supports deeply nested JSON structures
• Readable formatted output
• Mobile friendly responsive design

Use Cases

• Cleaning API responses before sharing with teams
• Removing secrets from debug logs
• Anonymizing customer data for demonstrations
• Preparing JSON samples for documentation
• Protecting private data in test environments
• Educational purposes when teaching APIs

Fun Fact

JSON has become one of the most popular data formats on the internet, and protecting sensitive fields inside JSON is now a daily need for developers, testers, and security teams around the world.

Historical Context

As web APIs and cloud services grew in popularity, JSON quickly replaced XML as the preferred data exchange format. With this shift, developers began handling massive amounts of structured personal data. The need to hide passwords, tokens, and personal details gave rise to JSON redaction utilities like this one, designed to promote privacy and responsible data sharing.