Format, validate, compare, and visualize JSON -- all in one place.
JSON (JavaScript Object Notation) is a lightweight data-interchange format that is easy for humans to read and write, and easy for machines to parse and generate. JSON formatting -- also called "pretty printing" -- adds proper indentation and line breaks to compressed or minified JSON, making it readable and easier to debug.
Invalid JSON can cause APIs to fail, configurations to break, and applications to crash. Our JSON validator checks your data against the JSON specification and provides specific error messages with line numbers, so you can quickly find and fix syntax errors like missing commas, unmatched brackets, or invalid escape sequences.
When working with API responses, configuration files, or data migrations, you often need to compare two JSON objects to see what changed. Our JSON diff tool performs a deep comparison and highlights additions, removals, and modifications at every level of nesting, making it easy to spot differences between complex data structures.
Large JSON documents can be difficult to navigate in text form. The tree view presents your JSON as a collapsible, hierarchical structure where you can expand and collapse objects and arrays. This makes it easy to explore deeply nested data and understand the overall shape of your JSON.