Developer Tools Hub
A comprehensive collection of utilities to help you work with JSON, XML, CSV, and YAML data — all processed entirely in your browser.
Every tool below runs client-side: nothing you paste, upload, or convert is ever sent to a server. That makes SmartJson safe for API keys, customer records, and other sensitive data you'd never want to hand to a third-party endpoint. Use the search bar or category filters to jump straight to a specific formatter, validator, converter, or comparison tool, or browse by format using the sections underneath.
JSON Formatter
Format, validate and beautify your JSON data.
JSON Validator
Validate JSON data in real-time with detailed error reporting.
JSON Compare
Compare two JSON objects and highlight differences.
Text Compare
Compare two text files and highlight differences.
JSON Minify
Compress JSON data to save space and improve performance.
JSON Viewer
Explore your JSON data with an interactive tree view.
JSON Sorter
Sort JSON keys alphabetically or by value.
JSON Stringify
Convert JS objects to JSON strings with escape sequences.
XML Formatter
Format and beautify your XML data with customizable indentation.
XML Validator
Validate XML syntax and check for well-formedness errors.
XML Compare
Compare two XML files and highlight differences.
XML Minify
Compress XML to a single line by removing whitespace.
WSDL Formatter
Format and validate Web Services Description Language files.
SOAP Formatter
Format SOAP messages for easier debugging and reading.