DummyJSON
Free fake REST API with placeholder JSON data for testing
12 tools like CyberChef, chosen by what they do. About CyberChef

Free fake REST API with placeholder JSON data for testing

Offline desktop toolkit with 30 tools for everyday developer tasks

Visualize JSON, YAML, CSV and XML as interactive graphs

Generates typed models from JSON, JSON Schema and GraphQL

Hand-picked collection of Open Graph images for inspiration

Generate random version 4 UUIDs online, one at a time or in bulk

Free collection of online tools for developers and IT work

Preview how links look on social media and generate OG images

Converts code between formats such as JSON, YAML, SVG and TypeScript

Cron schedule editor that explains expressions in plain English

Decode, verify and generate JSON Web Tokens in your browser

Learn, build and test regular expressions with live matching