Use 22 DevTools utilities directly in Claude Desktop, VS Code, and other AI assistants via the Model Context Protocol
The Model Context Protocol (MCP) is an open standard developed by Anthropic that enables AI assistants like Claude to securely connect with external tools and data sources. Think of it as a universal adapter that lets AI assistants use specialized developer tools for tasks requiring precision.
LLMs are prone to hallucinations and can struggle with tasks requiring exact formatting or deterministic outputs. By integrating with our MCP server, AI assistants can offload these tasks to specialized tools, improving accuracy and reliability. The MCP server uses the same battle-tested code as our DevTools web app, ensuring consistency across platforms.
LLMs can make errors with precise formatting. MCP tools provide deterministic, accurate results for tasks like JSON formatting or UUID generation.
TOON conversion reduces token usage by 30-50%, lowering API costs and fitting more data in context windows.
All operations are stateless. Your JSON, passwords, tokens, and sensitive data are never logged or persisted.
Access JSON, UUID, Base64, JWT, color tools, and more through a single MCP server configuration.
For detailed tool schemas, use MCP Inspector with URL: https://devtools-mcp.devinryanriota.com/mcp
Format JSON with proper indentation and optional key sorting
Compress JSON to single line (reduces token usage)
Convert JSON to TOON format (30-50% token savings)
Convert TOON format back to standard JSON
Generate UUIDs (v1, v4, v7)
Encode text to Base64
Decode Base64 to text
Generate secure passwords with customizable options
Generate Lorem Ipsum placeholder text
Convert Unix timestamp to human-readable date
Convert date to Unix timestamp
Get current Unix timestamp
Parse and validate CRON expressions
Generate CRON expressions from description
Decode JWT tokens to inspect header, payload, and claims
Verify JWT signatures using HMAC algorithms
Create and sign new JWT tokens
Convert colors between HEX, RGB, HSL, HSV, CMYK, and OKLCH formats
Generate random colors with all 6 format representations
Generate color palettes with complementary, analogous, and triadic colors
Check WCAG contrast ratios for accessibility compliance
Simulate how colors appear with different types of color blindness
Add the MCP server to your configuration
For Claude Desktop, edit your config file:
~/Library/Application Support/Claude/claude_desktop_config.json%APPDATA%\Claude\claude_desktop_config.json{
"mcpServers": {
"devtools": {
"url": "https://devtools-mcp.devinryanriota.com/mcp"
}
}
}Restart your application
Completely quit and reopen Claude Desktop or VS Code to load the new MCP server.
Start using the tools
"Format this JSON for me: {name:test,value:123}"
→ Your AI assistant will automatically use the prettify_json tool
Format API responses, generate test UUIDs, encode authentication tokens, and validate JWT payloads directly in your AI-assisted workflow.
prettify_jsongenerate_uuidencode_base64decode_jwtConvert colors between formats, check accessibility contrast ratios, generate placeholder text, and create secure passwords for test accounts.
convert_colorcheck_color_contrastgenerate_loremgenerate_passwordParse and generate CRON expressions, convert timestamps across timezones, and work with time-based scheduling.
parse_crongenerate_crontimestamp_to_datedate_to_timestampConvert large JSON payloads to TOON format before sending to LLMs, reducing token usage by 30-50% and lowering API costs.
convert_json_to_toonconvert_toon_to_jsonminify_jsonOnce configured, simply ask your AI assistant naturally. Here are some examples:
JSON Formatting
"Format this JSON: {name:test,age:25,city:NYC}"
TOON Conversion
"Convert this JSON to TOON format to save tokens"
UUID Generation
"Generate 5 v7 UUIDs for database IDs"
Base64 Encoding
"Encode 'Hello World' to Base64"
Password Generation
"Generate a secure 20-character password"
Timestamp Conversion
"Convert timestamp 1697904000 to a date"
CRON Parsing
"Explain what '0 9 * * 1-5' means"
JWT Decoding
"Decode this JWT and check if it's expired"
Color Conversion
"Convert #3498DB to RGB, HSL, HSV, CMYK, and OKLCH"
Contrast Check
"Check if white text on #3498DB passes WCAG AA"
MCP (Model Context Protocol) is an open standard developed by Anthropic that enables AI assistants like Claude to securely connect with external tools and data sources. It acts as a universal adapter, allowing AI models to use specialized developer tools for tasks requiring precision, such as JSON formatting, UUID generation, or timestamp conversion.
Installation is simple: add our MCP server URL to your Claude Desktop or VS Code configuration file. Just add {"mcpServers": {"devtools": {"url": "https://devtools-mcp.devinryanriota.com/mcp"}}} to your config, restart the application, and you're ready to use all 22 developer tools directly in your AI workflows.
MCP is currently supported by Claude Desktop, VS Code with GitHub Copilot, and other AI assistants that implement the Model Context Protocol. The protocol is open-source, so more AI tools are adding support over time.
Yes, our MCP server is completely free to use with no rate limits or usage restrictions. All tools are available at no cost, making it perfect for individual developers and teams alike.
Yes, your data is safe. Our MCP server processes requests in real-time without storing any user data. All operations are stateless, meaning your JSON, passwords, tokens, and other sensitive information are never logged or persisted.
Our MCP server provides 22 developer tools including: JSON formatting and minification, TOON conversion for token savings, UUID generation (v1, v4, v7), Base64 encoding/decoding, secure password generation, Lorem Ipsum generation, timestamp conversion, CRON expression parsing, JWT decoding/signing/verification, and comprehensive color tools for conversion, palettes, contrast checking, and color blindness simulation.
LLMs can hallucinate or make errors with precise formatting tasks. By offloading operations like JSON formatting, UUID generation, or timestamp conversion to specialized tools via MCP, AI assistants get deterministic, accurate results every time. This is especially important for tasks requiring exact syntax or cryptographic operations.
TOON (Token-Oriented Object Notation) is a compact data format that reduces token usage by 30-50% compared to JSON. When working with LLMs, fewer tokens means lower API costs and more room in the context window. Our MCP server can convert between JSON and TOON automatically.
Once configured, simply ask your AI assistant naturally. For example: "Format this JSON for me", "Generate 5 UUIDs", "Decode this JWT token", or "Check if these colors have enough contrast". The AI will automatically use the appropriate MCP tool and return accurate results.
Our MCP server is designed with privacy in mind. All operations are stateless - we don't store, log, or persist any data you send through the tools. Your JSON, passwords, JWT tokens, and other sensitive information are processed in real-time and immediately discarded.
Discover more utilities to streamline your workflow
Format, validate, and prettify JSON data with syntax highlighting and error detection.
Convert JSON to TOON (Token-Oriented Object Notation) and back. Optimize tokens for Large Language Model prompts.
Generate secure passwords with custom settings.
Generate Version 1, 4, and 7 UUIDs for applications and databases.
Build and validate CRON expressions with human-readable descriptions and examples.
Convert Unix timestamps to human-readable dates with timezone support and batch processing.
Generate placeholder text for layouts and designs with custom length options.
Convert colors between HEX, RGB, HSL, HSV, CMYK, and OKLCH formats with decimal precision and live preview.
Encode and decode Base64 strings quickly and easily with real-time conversion.
Encode and decode URLs for safe transmission with multiple encoding modes and batch processing.
Compare text files side-by-side with highlighted differences and merge capabilities.
Decode, verify, and encode JWT tokens with support for all major signing algorithms.
Generate secure hash values using multiple algorithms including SHA-256, MD5, bcrypt, and more with performance monitoring.
Generate QR codes from text, URLs, and data with customizable size and format.
Generate beautiful color palettes with hex, and RGB values.
Test and debug regular expressions with live matching.