JSON Formatter

The tool formats JSON data by parsing the left input and producing a readable, indented version on the right. It emphasizes a side-by-side comparison to help users see structural relationships and nesting at a glance.
Conceptually, the system uses a standard JSON parser to verify syntax and a deterministic serializer to apply indentation and optional key sorting. If sort_keys is enabled, keys are emitted in alphabetical order; otherwise, input order is preserved. The output remains faithful to the original data types (numbers, booleans, strings, null) while improving readability.
Benefits include faster debugging, easier documentation payloads, and consistent formatting for API responses, test fixtures, and data pipelines. Target users are developers, testers, and data engineers who work with JSON in web services, databases, or data exchange.
Unique value lies in the real-time, side-by-side presentation and precise error reporting that points to exact positions in the input. It requires no local install, supports UTF-8 data, and focuses strictly on formatting, with optional key ordering as an advanced feature.