drawDB
Free and open-source online database diagram editor and SQL generator. Design tables and relationships with drag-and-drop, then export DDL for MySQL, PostgreSQL, SQLite, MariaDB, or SQL Server. No sign-up required.
MySQL Syntax Check (www.piliapp.com)
An online MySQL SQL syntax validator. Paste your SQL queries and check for syntax errors to ensure your database queries are correctly structured before execution.
SQL Formatter For WEB (atl2.net)
A browser-based SQL formatting tool with extensive style options. Configure comma placement, AND/OR positioning, indentation style, JOIN formatting, and keyword casing. Features syntax highlighting via Ace editor. Maintained since 2006.
SQL Generator (toolpods.io)
Describe a database operation in natural language and AI generates the corresponding SQL query. Supports SELECT, INSERT, UPDATE, and DELETE.
