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 Lint
Lint and validate JSON syntax with detailed error checking.
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 Editor Online
Edit JSON with syntax highlighting and auto-completion.
JSON Pretty Print
Make JSON human-readable with advanced formatting options.
JSON Parser
Parse and analyze JSON strings with type information.
JSON Reader
Upload and read large JSON files securely in your browser.
JSON Sorter
Sort JSON keys alphabetically or by value.
JSON Stringify
Convert JS objects to JSON strings with escape sequences.
JSON to One Line
Remove all whitespace to create a single-line JSON string.
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.
XML Viewer
Visualize XML data in an interactive tree structure.
XML Editor
Edit XML content with basic helpers and syntax checking.
XML Pretty Print
Make XML human-readable with advanced formatting options.
XML Parser
Parse XML strings and analyze the structure and stats.
WSDL Formatter
Format and validate Web Services Description Language files.
SOAP Formatter
Format SOAP messages for easier debugging and reading.