Open Source JSON Playground

JsonPlace

Realistic JSON generation, custom mock APIs, reusable templates, and MCP workflows for AI-ready coding context.

MCP Docs
Guest

Schema Builder

Compose fields visually. Use dot paths like user.profile.name for nested objects.

    Optional: Import JSON Object

    Paste one JSON object and import its property paths automatically.

    Templates

    Use starter templates or your account templates.

    Starter

    Starter User

    Identity + company profile data

    E-Commerce Order

    Simple order payload with product and pricing

    Vehicle Registry

    Vehicle details plus ownership metadata

    Your templates

    Output

    Generate one or many samples. Copy or download instantly.

    {}

    Save current schema