JSON Formatter Demo

This tool accepts a JSON string and returns either a human-friendly formatted version or a compact minified version, along with a validation result. It supports three modes: pretty, minify, and validate. In pretty mode, the output is formatted with a user-specified indentation for readability. In minify mode, whitespace is removed to produce a compact representation suitable for payloads. In validate mode, the input is parsed to confirm syntax; success yields is_valid = true and no output if not requested, while failure provides an error message. The core concept is to separate data representation from whitespace and to rely on a standard JSON parser for correctness, preserving data values and structure. This is valuable for developers debugging APIs, QA engineers validating payloads, and data engineers preparing configuration files. The tool operates as a deterministic formatter with clear error reporting and predictable output formats, enabling consistent data exchange. It handles typical JSON types (numbers, strings, booleans, null, arrays, and objects) and respects Unicode characters. The feature set avoids data transformation beyond formatting; key order is preserved as provided by the parser. Typical use cases include preparing API requests, improving log readability, or generating compact payloads for transmission. The tool is designed to be language- and region-agnostic, relying on RFC 8259 JSON semantics, and can be integrated into CI pipelines or API testing workflows.