Developer Tools Directory
Browse our complete collection of fast, private, and free utilities.
JSON Tools
Format, validate, and manipulate JSON data.
JSON Formatter & Tree Viewer
Validate, format, and visualize JSON in a collapsible, interactive tree view — in real-time.
JSON → Zod Schema
Generate type-safe Zod validation schemas from any JSON object — with syntax-highlighted output.
JSON → Pydantic Model
Convert JSON to Python Pydantic BaseModel classes with nested object support — instantly.
CSV Tools
Convert and manage CSV files.
API & Protocol Tools
Tools for working with APIs, OpenAPI, and MCP.
OpenAPI → MCP Server
Convert any OpenAPI or Swagger spec into a ready-to-run MCP server — in TypeScript or Python.
JWT Decoder & Debugger
Decode, verify, and examine JSON Web Tokens (JWT) locally. Color-coded syntax, payload analysis, and expiration timeline.
Cron Expression Generator
Generate and explain cron expressions in plain English. Interactive builder and real-time execution schedule.
AI & LLM Tools
Utilities for working with Artificial Intelligence and LLMs.