SQL Formatter

How to Use the SQL Formatter

This free online SQL formatter helps you beautify and organize your SQL queries with proper indentation and formatting. Paste your SQL into the input field, choose your preferred indentation size, and click "Format" to instantly transform messy SQL into clean, readable code.

Features

• Automatic keyword uppercasing (SELECT, FROM, WHERE, JOIN, etc.)
• Proper line breaks before major SQL clauses
• Customizable indentation (2 or 4 spaces)
• Support for complex queries with JOINs, subqueries, and aggregations
• Client-side processing - your queries never leave your browser

Why Format SQL?

Well-formatted SQL is easier to read, debug, and maintain. When SQL queries grow complex with multiple JOINs, WHERE conditions, and subqueries, proper formatting becomes essential for understanding the query logic. Consistent formatting also helps during code reviews and makes it easier for team members to collaborate on database queries.

SQLフォーマッターの使い方

SQL文を入力エリアに貼り付け、インデント幅とキーワード大文字化のオプションを選択して「整形」ボタンを押すと、 読みやすく整形されたSQLが出力されます。SELECT、JOIN、WHERE等の主要句ごとに改行・インデントされ、 複雑なクエリの構造を把握しやすくなります。全ての処理はブラウザ内で完結します。

Supported SQL Statements

This formatter handles all major SQL statement types including SELECT, INSERT, UPDATE, DELETE, CREATE, ALTER, and DROP. It recognizes JOIN types (INNER, LEFT, RIGHT, OUTER), aggregate functions (COUNT, SUM, AVG, MAX, MIN), and conditional expressions (CASE, WHEN, THEN). The formatter works with most SQL dialects including MySQL, PostgreSQL, SQLite, and SQL Server.