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SQL Formatter

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About SQL Formatter

SQL Formatter transforms messy, single-line, or auto-generated SQL queries into clean, properly indented, and readable SQL. It supports major SQL dialects including MySQL, PostgreSQL, SQL Server, and Oracle, applying dialect-specific formatting rules. Database administrators, backend developers, and data analysts use it daily to make complex queries understandable and maintainable.

Key Features

  • Formats SELECT, INSERT, UPDATE, DELETE, and CREATE statements with proper indentation
  • Supports MySQL, PostgreSQL, SQL Server, Oracle, and SQLite dialects
  • Aligns JOIN clauses, WHERE conditions, and subqueries for visual clarity
  • Converts keywords to uppercase (SELECT, FROM, WHERE) for standard SQL readability
  • Handles complex queries with CTEs, window functions, and nested subqueries
  • Preserves comments and string literals without modification

How to Use SQL Formatter

  1. 1

    Paste your SQL query

    Copy the raw or auto-generated SQL query from your application logs, ORM output, or database client into the input area.

  2. 2

    Select your SQL dialect

    Choose the appropriate dialect (MySQL, PostgreSQL, etc.) to ensure the formatter applies the correct syntax rules.

  3. 3

    Click Format

    Press the Format button to restructure your query with clean indentation, keyword casing, and aligned clauses.

  4. 4

    Review the formatted query

    Verify the structured output by scanning the indented JOIN, WHERE, and GROUP BY clauses to ensure the query logic is correct.

  5. 5

    Copy for use

    Copy the formatted SQL into your query editor, migration file, stored procedure, or code review comment.

Common Use Cases

Debugging ORM-Generated Queries

Format the raw SQL output from ORMs like Sequelize, Prisma, or Hibernate to understand exactly what query is being executed against your database.

Code Review for Database Migrations

Clean up SQL in migration files so reviewers can easily verify schema changes, index additions, and data transformations.

Performance Optimization

Format complex queries before analyzing execution plans so you can clearly see join order, subquery nesting, and WHERE clause conditions.

Documentation and Knowledge Sharing

Present well-formatted SQL in runbooks, wiki pages, and onboarding guides so team members can quickly understand critical database queries.

Why Use Our SQL Formatter

Built-in support for MySQL, PostgreSQL, SQL Server, Oracle, and SQLite means you get dialect-aware formatting that generic beautifiers cannot match. Paste the raw output from any ORM or query logger and get a perfectly indented query in one click. No sign-up or installation required, and your queries stay private in the browser.

Your SQL Queries Stay Off the Wire

SQL queries frequently expose table structures, column names, business logic, and sometimes literal values including customer data. The SQL Formatter processes everything in your browser with no network requests. Format ORM-generated queries and production SQL without revealing your database schema to anyone.

Frequently Asked Questions

Does the formatter change the logic of my SQL query?
No. The formatter only changes whitespace, indentation, and keyword casing. The query logic, table references, conditions, and results remain identical.
Can it handle stored procedures and PL/SQL?
The tool is optimized for standard SQL statements (SELECT, INSERT, UPDATE, DELETE, CREATE). Stored procedures and PL/SQL blocks may receive basic formatting but complex procedural logic may not indent perfectly.
Why should I uppercase SQL keywords?
Uppercasing keywords like SELECT, FROM, and WHERE is a widely adopted convention that visually separates SQL syntax from table names and column names. It improves readability, especially in long queries with many clauses.

Last updated: April 6, 2026