JSON Key Renamer

Bulk rename JSON object keys using pattern matching, regex support, and case transformations. Preview changes before applying, create reusable rule sets, and handle nested structures with ease.

Input JSON

Paste your JSON data

Rename Rules

Preview & Output

View changes and results

Key Features

🔍 Pattern matching with regex support
📝 Multiple rule types (find/replace, regex, case conversion)
🏷️ Case transformations (camelCase, snake_case, kebab-case, etc.)
🌊 Deep nested object key renaming
👁️ Visual preview of changes before applying
↶↷ Undo/redo functionality
📤📥 Export/import rule sets for reuse
📊 Statistics on keys renamed
✅ Pattern validation and testing
⚡ Performance optimized for large objects
🔒 Privacy-focused: no data sent to servers

What is JSON Key Renaming?

JSON Key Renaming allows you to bulk rename object keys in JSON data using powerful pattern matching and transformation rules. Perfect for data migration, API response transformation, and code refactoring tasks.

🔍 Pattern Matching

  • Find & Replace: Simple text replacement (e.g., "user_" → "account_")
  • Regex Support: Advanced pattern matching with capture groups
  • Case Sensitivity: Control exact or flexible matching

🏷️ Case Transformations

  • camelCase: firstName, lastName, emailAddress
  • snake_case: first_name, last_name, email_address
  • kebab-case: first-name, last-name, email-address
  • PascalCase: FirstName, LastName, EmailAddress