Free JSON/Data Tools
JSON, CSV, and data-format tools for developers — validate, pretty-print, and convert structured data client-side.
9 tools · 100% client-side · no login, no uploads
Base64 Encoder & Decoder
Convert text or binary data to Base64 and back instantly. Our secure encoder/decoder works 100% client-side, ensuring your data never leaves your browser.
JSON Formatter & Validator
Format, beautify, and validate your JSON data instantly. Our secure tool works 100% client-side to ensure your data stays private.
CSV to JSON Converter
Transform CSV data into structured JSON format instantly. High-performance, client-side conversion ensures your data never leaves your device.
JSON Diff/Compare
Identify differences between two JSON structures instantly. A powerful tool for developers with 100% private, local processing.
JSON to YAML Converter
Transform your JSON data structures into YAML format instantly. High-performance, client-side conversion ensures your data never leaves your device.
CSV Splitter/Merger
Split large CSV files or merge multiple datasets into one instantly. High-performance, client-side processing for absolute data privacy.
JSON Schema Generator
Generate high-quality JSON Schemas from your sample JSON data instantly. A powerful, secure tool for data validation and API development.
HTML Table Generator from CSV
Transform your CSV data into clean, responsive HTML tables instantly. Fast, secure, and 100% client-side processing for your web projects.
Base62 Encoder/Decoder
Convert data to Base62 and back instantly. A secure, local tool for URL shortening and unique identifier encoding with 100% privacy.