JSON Parser — Parse and Inspect JSON Structure
Parse JSON strings into a structured view showing data types, key paths, and value counts. Ideal for understanding unfamiliar API responses.
Parsing vs. Formatting
Formatting focuses on visual presentation: indentation, line breaks, and whitespace. Parsing focuses on understanding structure: what are the data types, how deep is the nesting, what are all the unique key paths. Use the parser when you need to reverse-engineer an unfamiliar data structure, and the formatter when you already know the structure and just want it readable.
Generating Type Definitions from Parsed JSON
Once you parse a JSON payload, you can generate TypeScript interfaces or JSON Schema definitions from the inferred structure. This is invaluable when working with undocumented APIs: paste the response, parse it, and export a type definition you can use directly in your codebase.
Frequently Asked Questions
For each node, the parser displays the data type (string, number, boolean, null, object, array), the full key path (e.g., data.users[0].name), the byte size of the value, and the total count of child elements for objects and arrays.
Yes. Click on any node in the parsed tree to copy its JSONPath expression. You can use this path in your code (e.g., with jq, JavaScript, or Python) to extract that specific value programmatically.