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Data Converter

Data Converter — free online tools

39 tools

Data conversion is a core full-stack skill. This collection provides JSON-to-Go/TypeScript struct conversion, JSON-to-SQL/CSV/YAML, mock data generation, CSV formatting and validation, QR code generation and decoding, and various unit converters and data visualization tools.

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JSON to TypeScript

Generate TypeScript types from JSON HOT 🐹

JSON to Go Struct

Generate Go structs from JSON HOT ☕

JSON to Java Class

Generate Java POJO classes from JSON 🐍

JSON to Python Class

Generate Python dataclasses from JSON 🦀

JSON to Rust Struct

Generate Rust structs from JSON 💜

JSON to C# Class

Generate C# classes from JSON 🗃

SQL to JSON

Format SQL results as JSON 📝

Markdown to HTML

Convert Markdown text to HTML 📄

HTML to Markdown

Convert HTML code to Markdown 🔄

TOML to JSON

Convert TOML config to JSON 🔄

INI to JSON

Convert INI config to JSON 📏

Length Converter

Convert meters, inches, feet, etc. ⚖

Weight Converter

Convert kg, pounds, ounces, etc. 🌡

Temperature Converter

Convert Celsius, Fahrenheit, Kelvin 📐

Area Converter

Convert sq meters, acres, hectares 💾

Data Size Converter

Convert Byte, KB, MB, GB, TB 🏃

Speed Converter

Convert km/h, m/s, mph, etc. 🎲

Mock Data Generator

Generate various test mock data HOT 👤

Random User Generator

Generate random user profiles 🪪

ID Card Validator

Validate Chinese ID card numbers 📱

Phone Number Validator

Validate phone number format 📧

Email Validator

Validate email address format 💳

Credit Card Validator

Luhn algorithm card validation 📊

Excel Formula Converter

Convert Excel formulas to SQL 🔍

JSON Diff

Visual diff of two JSON structures 🔍

YAML Diff

Visual diff of two YAML files 🔄

.env to JSON

Convert .env variables to JSON 📋

JSON Flattener

Flatten nested JSON to key-value 🗃

CSV to SQL

Generate SQL INSERT from CSV data 🗃

JSON to SQL

Generate SQL INSERT from JSON data 📊

SQL to CSV

Convert SQL results to CSV format 📘

GraphQL to TypeScript

Generate TS types from GraphQL 📘

OpenAPI to Types

Generate TS types from OpenAPI spec 📊

Data Format Comparison

Compare JSON/XML/CSV/YAML/Parquet ✅

JSON Schema Validator

Validate JSON against JSON Schema ✅

CSV Validator

Check CSV encoding and data errors 📊

CSV Viewer

Preview CSV/TSV with sort and search NEW 📄

XML Schema Guide

XSD XML validation reference 📦

Avro Schema Guide

Apache Avro schema definition guide