JSON/XML/Data Tools
Free online JSON and XML tools: format, validate, and minify. No signup, works in your browser.
8 tools
JSON/XML/Data Tools handles the two most common structured-text formats when you need to read, validate or shrink a document rather than write one from scratch. The JSON Formatter re-indents and checks a document with 2 spaces, 4 spaces or a tab; the JSON Minifier does the reverse, stripping every non-essential space after validating first; the XML Formatter re-indents XML and reports its first structural error. All three parse locally with the browser's own engines and never send what you paste anywhere. Use them to make an API response readable, catch a syntax error, or trim a payload before sending it.
Which tool should I use?
- Use the JSON Formatter to turn a compact or messy JSON string into an indented, reviewable document; use the JSON Minifier for the opposite, once the JSON is known to be valid.
- Both JSON tools validate before doing anything — if you only need a yes/no on validity, either one reports the first error and its position.
- Use the XML Formatter for XML; there is no XML minifier, and its indentation is fixed at two spaces with no option.
- For CSV or spreadsheet data, or converting CSV to JSON, use CSV & Spreadsheet Tools rather than these.
Limitations and things to know
- JSON parsing is strict: comments, trailing commas and single-quoted strings are rejected. Duplicate object keys collapse to the last value, and numeric-looking keys are reordered ahead of the rest.
- Numbers are parsed as JavaScript doubles, so integers beyond ±2^53 and very high-precision decimals lose precision when reformatted.
- The XML Formatter checks well-formedness only — matched tags, a single root, no text outside it. It does not validate against a DTD or schema, resolve entities, or check namespaces.
- Reformatting XML trims whitespace inside text nodes, so significant spacing in mixed content can change.
- Processing limits: 2 MB of input, roughly 100,000 values and 64 levels of nesting.
JSON to XML Converter
Convert JSON data into XML text for systems or files that require an XML representation.
Use toolXML to JSON Converter
Parse XML and produce a JSON representation for inspection, scripting or migration work.
Use toolYAML to JSON Converter
Convert YAML into JSON for APIs, configuration checks or tooling that expects JSON syntax.
Use toolJSON to YAML Converter
Convert JSON into readable YAML while preserving the represented data types supported by the converter.
Use toolJSON Diff / Compare
Compare two JSON documents and highlight structural or value differences after validating the input.
Use toolXML Formatter & Validator
Re-indent XML at two spaces per level and flag the first well-formedness error; no DTD or schema check.
Use toolJSON Minifier
Strip every non-essential space, tab and line break from valid JSON without changing a single value.
Use toolJSON Formatter & Validator
Re-indent and validate a JSON document with 2-space, 4-space or tab indentation; reports the first syntax error.
Use tool