SQL Tools
Format SQL, design queries, sketch ERDs, and convert structured data into SQL statements.
CSV to SQL Converter
Convert CSV data to SQL CREATE TABLE and INSERT statements. Auto-detect column types. Supports MySQL, PostgreSQL, SQLite, SQL Server. Free online tool.
ERD Diagram
Design entity-relationship diagrams visually. Add tables, define columns (PK/FK/nullable), draw relationships (1:1, 1:N, M:N), generate SQL, export PNG. Free online tool.
SQL Formatter
Format and beautify SQL queries online. Keyword capitalization, indentation, dialect selector (MySQL/PostgreSQL/SQLite/SQL Server). Free, no sign-up.
JSON to SQL Converter
Convert JSON arrays to SQL CREATE TABLE and INSERT statements. Auto-detect schema from JSON objects. Free online tool.
SQL Query Builder
Build SQL SELECT queries visually. Add tables, columns, WHERE conditions, ORDER BY, GROUP BY, HAVING, LIMIT. Free online tool.