JSON Formatter

This tool formats JSON text to be human-readable or compact for transmission. It validates input against RFC 8259, reports exact line/column errors, and outputs a deterministic representation. Users supply raw_json and optional settings to control indentation, key sorting, and output mode. In pretty mode, the formatter applies the chosen indentation to produce readable trees with consistent line breaks. In compact mode, whitespace is minimized to produce small payloads suitable for logs or network calls. Sorting keys recursively ensures stable diffs and uniform documentation of objects. Conceptually, the tool parses the input, validates structure, then serializes the data using the selected rules, preserving all string content and numeric values. This is valuable for developers, API engineers, data scientists, and QA teams who need predictable JSON output for testing, examples, and integration work. Unique value lies in strict RFC 8259 compliance, precise error reporting, and a straightforward API that supports both human readability and machine efficiency. Core features include strict parsing, error localization, indentation customization, optional key sorting, and dual output modes. Common use cases include formatting API responses for review, preparing snippet payloads for docs, and converting logs into structured JSON for analysis. The tool emphasizes correctness, reproducibility, and interoperability across languages and environments.