JSON Tools - View Edit

Tree view, diff, validation, mock data, and Dart model generation in one fast tool—built by developers, for developers.

JSON Tools is a fast, modern JSON workbench built for developers who live inside APIs.

WHAT YOU CAN DO • Explore large JSON files in tree or raw view with collapsible nodes • Edit with line-numbered syntax highlighting, Undo/Redo, and smart indent • Catch errors as you type with instant JSON validation and clear messages • Compare two JSON documents line by line with the diff engine • Generate strongly-typed Dart model classes in one tap • Spin up realistic mock data for unit tests in seconds • Visualize structure as a connected graph with Graph View

BUILT FOR Flutter / Dart developers, backend engineers, QA engineers, and anyone who wrestles with JSON every day.

EXPERIENCE Personalized Light and Dark themes, smooth animations, and an ad-free Premium option for focused work.

Take control of your JSON—download JSON Tools now.