Structured Query Language (SQL) is beautiful when written well. But it is rarely written well. Most of the time, it looks like a 400-character single line coping from a log file, or a mess of inconsistent capitalization generated by an ORM like Hibernate or Entity Framework.

Reading bad SQL is not just annoying; it is dangerous. It hides logic errors, obscures missing WHERE clauses, and makes code reviews painful. The SQL Formatter & Beautifier is the antidote. It enforces standard styling rules to make your queries professional and readable instanly.

Before vs After

Before (The Mess)

select u.id,u.email,o.total from users u join orders o on u.id=o.user_id where o.created_at>'2023-01-01' and o.status='paid' order by o.total desc limit 10

After (The Beast)

SELECT
  u.id,
  u.email,
  o.total
FROM
  users u
  JOIN orders o ON u.id = o.user_id
WHERE
  o.created_at > '2023-01-01'
  AND o.status = 'paid'
ORDER BY
  o.total DESC
LIMIT
  10;

Features of a Good SQL Formatter

1. Keyword Capitalization

SQL is case-insensitive, but humans are not. Standard convention is to CAPITALIZE keywords (SELECT, FROM, WHERE) and keep identifiers (table names, columns) lowercase. This visual distinction helps the eye scan the logic quickly.

2. Smart Indentation

The formatter understands strict nesting.

  • SELECT columns are stacked.
  • JOIN clauses are indented under FROM.
  • AND/OR conditions are stacked under WHERE.
  • Subqueries are indented further to show depth.

3. Dialect Support

Not all SQL is the same. Our tool supports multiple dialects:

  • Standard SQL: The ANSI standard.
  • MySQL/MariaDB: Uses backticks (`) for escaping.
  • PostgreSQL: Uses double quotes (") for identifiers.
  • SQL Server (T-SQL): Uses brackets ([ ]) and specific functions like `TOP`.

Advanced SQL: Handling Complexity

Formatting becomes critical when dealing with advanced features:

CTEs (Common Table Expressions)

A WITH clause defines temporary tables. Without formatting, chaining multiple CTEs is unreadable. Our tool separates each CTE into its own block.

Window Functions

Expressions like `ROW_NUMBER() OVER (PARTITION BY x ORDER BY y)` are lengthy. The formatter breaks them down logically to keep line lengths manageable.

Privacy & Security

Crucial: SQL queries often inadvertently contain PII (Personally Identifiable Information) in the WHERE clauses (e.g., `WHERE email = 'ceo@company.com'`).

Sending this data to a server-side formatter is a security risk. Our SQL Beautifier runs entirely in your browser using JavaScript. No network request is made with your query.

Need to parse data from a database export? Try our CSV to JSON Converter.