Claude Formatter

claude-formatter

A CLI tool to format Claude's streaming JSON output for better readability.

Installation

npm install -g claude-formatter

Usage

Pipe Claude's streaming JSON output to `claude-formatter`:

claude --continue -p "Continue iterating..." --output-format stream-json | claude-formatter

Features

• Formats streaming JSON output from Claude
• Converts escaped sequences (\n, \t) to actual characters
• Pretty prints different message types with emojis
• Color-codes output for better readability
• Handles tool calls and responses
• Shows token usage statistics

Examples

Basic usage

# Pipe Claude output directly
claude --output-format stream-json "Your prompt here" | claude-formatter

# Use with Claude's continue feature
claude --continue -p "Continue iterating..." --output-format stream-json | claude-formatter

# Save formatted output to a file
claude --output-format stream-json "Your prompt" | claude-formatter > output.log

Message Types

The formatter recognizes and specially formats these message types:

• 🤖 Assistant messages - Shows model responses with content blocks
• 👤 User messages - Displays user inputs
• ⚙️ System messages - System information and available tools
• 🛠️ Tool use - When Claude uses a tool
• 🔧 Tool results - Results from tool execution
• 📝 Text content - Regular text content
• ❌ Errors - JSON parsing errors

Contributing

1. Fork the repository
2. Create your feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add some amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

License

ISC