loggerhead/json4u

JSON For You is a JSON visualization and processing tool that runs in the browser.

The tool addresses the need to inspect, validate, and manipulate JSON data through an interactive interface. It offers multiple viewing modes—graph and table views—alongside structured and text comparison capabilities. The tool supports jq for querying, handles nested parsing, validates JSON with error context, and can import and export CSV files. Performance optimizations allow it to handle large files over one megabyte by rendering only visible nodes in graph mode.

Developers working with JSON data at any scale should consider this tool if they need quick visualization without leaving the browser. The graph and table view modes suit different inspection workflows, while the comparison features help identify differences between JSON structures. The jq support appeals to users already familiar with that query language. The tool is positioned as a web-based alternative to desktop JSON editors, with a focus on ease of use through a well-designed interface.

Development activity centers on enhancements and bug fixes. The project maintains a public roadmap showing completed work on performance improvements, search functionality in graph mode, and value preview features, alongside planned additions like file sharing with expiration dates, a command-line tool, and a VS Code plugin.