JSON/XML formatter
Format, validate, and beautify JSON and XML files.
Drop JSON/XML file here or click to select
Works with .json, .xml, .xacro, .urdf files
JSON Features:
- • Format and beautify JSON
- • Minify for production
- • Remove comments (non-standard)
- • Sort object keys alphabetically
- • Validate syntax and structure
XML Features:
- • Format XML, XACRO, URDF files
- • Proper indentation and structure
- • XML declaration handling
- • Validation with error reporting
- • Minification support
General Features:
- • File upload with drag & drop
- • Real-time formatting
- • Customizable indentation
- • Copy and download results
- • Line and character counting
- • Auto-detect file format
- • Error highlighting
A practical guide to JSON/XML formatter
JSON and XML Formatter validates, indents, and compacts structured text while exposing syntax errors. Formatting preserves data meaning but does not invent missing keys, tags, or values.
Example: inspect an API response
Paste the JSON, format it for readable nesting, correct the reported syntax location, and minify only the validated result for transport.
Task-specific steps
- 1
Paste the complete JSON or XML input and select the correct syntax mode before formatting.
- 2
Run validation, use the reported error location to repair malformed quotes, commas, nesting, tags, or entities.
- 3
Format for review or compact for delivery, then parse the output again in the consuming application.
Options that affect the result
- Pretty formatting adds indentation and line breaks; compact mode removes unnecessary whitespace.
- Syntax-aware validation distinguishes JSON tokens from XML elements, attributes, declarations, and entities.
Limitations to know first
- Syntactic validity does not prove that data matches an API schema or contains correct business values.
- Formatting very large documents can use substantial browser memory and does not stream partial input.
Questions specific to this task
Can a formatter repair invalid JSON automatically?
It can point to syntax problems, but guessing a missing value or delimiter could change meaning, so repairs should be explicit.
Does XML formatting resolve external entities?
Do not depend on external entity resolution. Validate required namespaces and schema behavior in the target system.