This is a free, real-time JSON formatter and validator that runs 100% in your browser. No data is sent to any server. It supports formatting (beautifying), minifying, sorting keys alphabetically, and real-time validation with line-accurate error messages.
JSON.parse() converts your text into an in-memory JavaScript object, then JSON.stringify() renders it back with proper indentation. This also validates the JSON as a side effect " any syntax errors are caught and displayed with the exact character position.
All processing is done entirely in your browser's memory using JavaScript. No data is sent to any server. When you close this tab, the data is gone. This makes it safe to use with API keys, tokens, or private configuration files.
It recursively sorts all object keys alphabetically throughout the entire JSON structure. Useful for comparing two JSON objects for differences or enforcing consistent key ordering in config files.
Minifying removes all whitespace, newlines, and indentation from valid JSON. The result is functionally identical but smaller " useful for reducing payload size in HTTP API responses or configuration files.
Compare two JSON objects to find differences in structure, values, and keys. Identify what changed between API versions or config updates.
JSON comparison involves checking two JSON objects for differences in their structure (keys), values, and ordering. This is essential when debugging API changes, verifying configuration updates, or testing data transformations.
The "Sort Keys" feature is critical for JSON comparison. Without sorted keys, objects with identical data but different key ordering appear different in a line-by-line diff. Sorting both objects first eliminates false positives from key ordering.
This tool helps you prepare JSON for comparison by formatting both objects with consistent indentation and sorted keys, making them ready for any diff tool (VS Code, Beyond Compare, diff command).
Use cases for JSON comparison:
Format both with Sort Keys enabled in this tool, copy each output, then paste them into a diff tool (VS Code, Beyond Compare, or the diff command). Sorted keys ensure identical structures align perfectly for line-by-line comparison.
JSON objects are unordered by specification. {"a":1,"b":2} and {"b":2,"a":1} are semantically identical but look different in text. Sort Keys resolves this by alphabetizing all keys in both objects.
This tool prepares JSON for comparison by formatting and sorting keys. For actual diff highlighting, paste the formatted outputs into VS Code or an online diff tool that highlights added, removed, and changed lines.