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Format, validate XML with XPath queries, interactive tree view, XML-to-JSON conversion, and multiple color themes
Format, validate, and convert between YAML and JSON formats. Live validation, syntax highlighting, and bidirectional conversion.
Generate JSON Schema from JSON data automatically. Infers types, formats (email, date, URI), required fields, nested objects, and arrays. Supports Draft-07 and 2020-12.
Working with minified or messy JSON? This formatter parses your JSON, validates it, and outputs a clean, indented version you can actually read. Syntax errors are flagged with line numbers so you can fix problems fast. It handles nested objects, arrays, and large payloads without breaking a sweat.
Format minified API responses into readable JSON to inspect data structures, spot missing fields, or verify correct values.
Reformat messy configuration files with consistent indentation before committing to version control.
Catch syntax errors — missing brackets, extra commas, unquoted keys — before they cause runtime failures in your application.
Collapse and expand nested objects to understand the shape of large JSON documents from third-party APIs or databases.
Format example payloads cleanly for API docs, README files, or technical specifications.
Beyond basic pretty-printing, the formatter validates your JSON against the spec and surfaces precise error locations when something is wrong — a misplaced comma, an unquoted key, or a trailing comma that slipped in. You can adjust indentation (2 or 4 spaces, or tabs), collapse or expand sections of deeply nested structures, and copy or download the formatted output. For developers working with API responses, config files, or data pipelines, this eliminates the cycle of pasting JSON into random online tools and hoping they do not log your data.
It identifies and reports syntax errors with their location, but it does not auto-correct invalid JSON. You will need to fix the issues manually based on the error messages.
The tool handles payloads of several megabytes comfortably. Extremely large files (10MB+) may slow down the browser since all processing happens client-side.
This tool validates against the strict JSON specification. Comments and trailing commas — allowed in JSON5/JSONC — will be flagged as errors.
No. All formatting and validation happens entirely in your browser. Nothing is transmitted or stored.
All processing happens directly in your browser. Your files never leave your device and are never uploaded to any server.