Best Free JSON Formatter Online - JSON Validator and Beautifier
Our JSON formatter is the most advanced free online JSON formatting tool that instantly formats, validates, and beautifies JSON data. Perfect for developers debugging API responses, DevOps engineers managing configuration files, data analysts processing JSON datasets, and backend engineers validating JSON structures. Real-time JSON validation with syntax highlighting, error detection with line numbers, pretty-printing with customizable indentation, JSON minification for production, and JSON tree view for complex structures. Supports large JSON files up to 10MB. Works with REST API responses, GraphQL queries, MongoDB documents, configuration files, package.json, tsconfig.json, and all JSON formats. Validate JSON against JSON Schema for data integrity.
CSV Converter Tool - Convert CSV to JSON, XML, Excel Online
Convert between CSV, JSON, XML, Excel, TSV, and other data formats with our advanced CSV converter tool. Instantly transform CSV files to JSON arrays or objects, convert JSON to CSV for spreadsheet import, parse CSV with custom delimiters and quotes, handle large CSV files up to 50MB, preserve data types during conversion, and export to multiple formats. Essential for data migration between databases, API integration with third-party services, importing data to Excel or Google Sheets, converting spreadsheet data to JSON for web apps, and ETL (Extract, Transform, Load) processes. Supports UTF-8 encoding, handles special characters, empty fields, and quoted values correctly. Alternative to online CSV to JSON converters with better accuracy.
XML Parser and Formatter - XML Validator Online Free
Parse, validate, and format XML documents with our free XML parser tool. Instantly validate XML syntax, format XML with proper indentation, convert XML to JSON for easier processing, minify XML for production use, and view XML tree structure. Perfect for developers working with SOAP APIs, RSS feeds, SVG files, Android layouts, configuration files, and XML data interchange. Supports XSD schema validation, namespace handling, CDATA sections, and XML comments. Debug XML parsing errors with detailed error messages and line numbers. Works with SOAP responses, RSS/Atom feeds, SVG graphics, Maven pom.xml, Spring XML configs, and all XML formats.
Fake Data Generator - Random Test Data Generator for Development
Generate realistic fake data for testing, development, and prototyping with our advanced fake data generator. Create random names, emails, addresses, phone numbers, dates, UUIDs, credit cards, user profiles, and custom data patterns. Perfect for populating test databases, creating mockups and prototypes, API testing and development, generating sample datasets, seeding development environments, and privacy-compliant testing without real user data. Choose from 50+ data types including first names, last names, full names, email addresses, street addresses, cities, countries, zip codes, phone numbers, dates, timestamps, numbers, booleans, UUIDs, lorem ipsum text, and more. Export generated data as JSON, CSV, SQL INSERT statements, or XML. Supports bulk generation of thousands of records. Alternative to Mockaroo, Faker.js, and other data generation tools.
Data Validator - Validate JSON, XML, CSV, YAML Online
Validate data formats including JSON, XML, CSV, YAML, and more with our comprehensive data validator. Instantly check syntax errors, validate against schemas, verify data structure, and get detailed error messages with line numbers. Essential for developers validating API payloads before deployment, data engineers checking data quality, QA testers verifying data integrity, and DevOps engineers validating configuration files. Supports JSON Schema validation, XML XSD validation, CSV structure validation, YAML syntax checking, and custom validation rules. Works with API responses, configuration files, data imports, and all structured data.
Why Choose Rune Data Tools?
Rune provides the best free data processing tools online with instant results, no registration required, complete privacy protection, mobile-friendly responsive design, and professional-grade accuracy. Whether you need a JSON formatter for debugging, CSV converter for data migration, XML parser for API integration, fake data generator for testing, or data validator for quality assurance - Rune offers the complete data tools suite for developers, analysts, data scientists, and business professionals.
Data Tools Use Cases
- Software Developers: Format JSON API responses; Convert CSV to JSON; Validate XML; Generate test data; Debug data structures
- Data Analysts: Convert between data formats; Validate CSV imports; Parse XML reports; Generate sample datasets
- Data Scientists: Process JSON datasets; Convert CSV for analysis; Validate data quality; Generate training data
- Backend Engineers: Format JSON configs; Validate API payloads; Parse XML responses; Test with fake data
- DevOps Engineers: Validate configuration files; Format JSON logs; Parse XML configs; Generate test environments
- QA Testers: Generate test data; Validate data formats; Convert test datasets; Check data integrity
- Database Administrators: Convert CSV for imports; Validate data structure; Generate SQL inserts; Format JSON exports
- API Developers: Format JSON responses; Validate request payloads; Convert between formats; Test with mock data
- Data Engineers: Process ETL pipelines; Validate data quality; Convert between formats; Generate test datasets
- Business Analysts: Convert data for reports; Validate spreadsheet imports; Format data exports; Generate sample data
Supported Data Formats
All data tools support multiple formats including JSON (JavaScript Object Notation), CSV (Comma-Separated Values), XML (Extensible Markup Language), YAML (YAML Ain't Markup Language), TSV (Tab-Separated Values), Excel (XLSX, XLS), SQL (Structured Query Language), HTML tables, and more. Unicode support ensures accurate processing for all character sets. Works with API responses, database exports, configuration files, spreadsheet data, and all structured data formats.