Online Developer Tools
Every tool runs 100% in your browser. No signup, no upload, unlimited and free.
UUID v7 Generator & Timestamp Decoder
Generate RFC 9562 UUID v7 and decode its timestamp.
JSON to TypeScript Interface
Generate type-safe TypeScript interfaces from JSON.
JSON to Zod Schema
Infer a Zod validation schema from a JSON sample.
LLM Token & Pricing Calculator
Estimate tokens and cost across GPT, Claude, Llama and Gemini.
Structured Output JSON Schema Generator
Create strict JSON Schema for LLM structured output.