SQLZoo

Interactive SQL tutorial with online editor

DB Browser for SQLite

Open source visual tool to create, design, and edit SQLite database files

JSON Formatter & Validator

Online tool to format and validate JSON data

XML Validator

Online tool to validate XML documents

CSVJSON

Online tool to convert CSV to JSON and vice versa

Mockaroo

Test data generator

Quick Database Diagram

Online tool to design database diagrams

Data Types

Find the right data type for your application.