JSON Formatter

This tool accepts JSON text input and returns a formatted, validated version. It supports pretty-printed output with configurable indentation and an option to minify for compact transmission. It validates syntax against RFC 8259 and reports exact error positions to aid debugging, including line and column indices and a JSON path if available.
Core logic combines a strict parser, an AST transformer, and a serializer. When the input is valid, the formatter outputs structurally consistent data with uniform spacing, line breaks, and key ordering when requested. When the input is invalid, the tool returns a structured error object containing a descriptive message, the affected JSON pointer, and actionable guidance.
Intended users include developers, API engineers, data analysts, and quality assurance teams who routinely exchange JSON. The tool can be used in isolation or integrated into pipelines as a web service, library, or command-like endpoint, enabling automated formatting, validation, and quick inspection of complex payloads.
Unique value comes from deterministic formatting settings, precise error diagnostics, and the ability to toggle between pretty and minified modes without changing data semantics. It is focused on correctness and speed, does not alter values, and supports large payloads with streaming-like processing where feasible.