About SQL Formatter
Comprehensive Overview
The SQL Formatter beautifies messy SQL queries into clean, readable code with proper indentation and optional uppercase keywords. Whether you're debugging a complex query from a log file or formatting SQL for documentation, this tool transforms single-line SQL into a structured, readable format in seconds.
Key Features
- Format & Beautify — Add proper indentation and line breaks to make SQL queries readable. Each clause (SELECT, FROM, WHERE, JOIN, etc.) starts on a new line.
- Minify — Compress SQL into a single line by removing unnecessary whitespace. Useful for embedding in application code or configuration.
- Uppercase Keywords — Optionally convert SQL keywords to uppercase (SELECT, FROM, WHERE) while preserving the case of identifiers and values.
- Multi-Dialect Support — Works with MySQL, PostgreSQL, SQLite, SQL Server, and standard ANSI SQL syntax.
How to Use
- Paste your SQL query into the input field.
- Select the action: Format to beautify, Minify to compress, or Uppercase Keywords to standardize keyword case.
- Click Process and copy the formatted result.
Supported SQL Statements
- Data Queries — SELECT, FROM, WHERE, JOIN (INNER, LEFT, RIGHT, CROSS, FULL OUTER), GROUP BY, HAVING, ORDER BY, LIMIT, OFFSET, UNION
- Data Manipulation — INSERT INTO, VALUES, UPDATE, SET, DELETE FROM
- Schema Definitions — CREATE TABLE, ALTER TABLE, DROP TABLE, CREATE INDEX
- Subqueries — Nested SELECT statements with proper indentation
Technical Background
SQL formatting applies a set of rules that identify SQL keywords and clauses, then add consistent indentation and line breaks. The formatter preserves string literals (both single-quoted and double-quoted), comments (single-line -- and multi-line /* */), and numeric values. Formatting changes only whitespace and optionally keyword case — the query logic remains identical.