What SQL dialects are supported?

The tool supports multiple SQL dialects: MySQL, PostgreSQL, SQLite, MariaDB, PL/SQL, N1QL, DB2, Redshift, and Spark. Select the dialect that matches your database system for best formatting results. Generic SQL dialect is also available for standard SQL queries.

Will formatting change my SQL functionality?

Formatting should not change SQL functionality—it only adds indentation and line breaks. SQL is whitespace-insensitive (except in string literals), so formatting is generally safe. Always test formatted SQL to ensure it works correctly, especially with complex queries.

Can I customize the indentation style?

You can choose indentation size (2, 4, or 8 spaces), but the formatting style (spaces vs tabs, keyword placement) is fixed. The tool uses standard SQL formatting conventions. For custom formatting rules, use specialized SQL formatters or code editors.

Does this tool support stored procedures or PL/SQL?

The tool supports PL/SQL dialect, but complex stored procedures or advanced PL/SQL features may have limited formatting support. Basic PL/SQL blocks should format correctly. For very complex stored procedures, test formatting carefully or use specialized PL/SQL formatters.

Can I format SQL with comments?

Yes, the tool preserves SQL comments (-- for single-line, /* */ for multi-line) during formatting. Comments are maintained in their original positions or moved to appropriate locations based on formatting rules. Your comments will remain in the formatted SQL.

SQL Formatter - Beautify Queries Free

When to Use This Tool

Use this when:

You have messy or unformatted SQL queries and need to clean them up for readability
You're debugging SQL issues and need properly formatted code to identify problems
You're learning SQL and want to see well-formatted query structure
You need to standardize SQL formatting across multiple queries or projects
You want to improve code readability by adding proper indentation and line breaks
You're preparing SQL for code review or collaboration and need clean formatting
You're working with SQL from different sources and need consistent formatting

Don't use this if:

You need to preserve exact whitespace or formatting (formatting changes whitespace)
You're working with SQL that has specific formatting requirements that must be preserved
You need to format very large SQL files (over 1MB may process slowly)
You require specific formatting rules or custom indentation styles (tool uses standard formatting)
You want to format SQL with embedded application code or server-side syntax (may break syntax)

What is a SQL Formatter?

A SQL formatter takes raw, single-line, or poorly formatted SQL queries and reformats them with proper indentation, keyword capitalization, and readable structure. Our tool processes everything in your browser — your database queries never leave your device.

SQL formatting is critical for code review and maintainability: making complex multi-join queries readable, standardizing query formatting across team projects, debugging long stored procedures, documenting database queries in technical specifications, and understanding unfamiliar queries in legacy systems.

This tool is essential for database administrators writing and reviewing complex queries, back-end developers working with ORMs and raw SQL, data analysts formatting queries for reports and documentation, DevOps engineers debugging database performance issues, and students learning SQL who need clearly structured query examples.

Compared to database GUI formatters (which are tied to specific tools like DBeaver or DataGrip), command-line tools like sqlformat (which require Python), or online formatters that may log your queries (potentially exposing database schema information), PureXio formats SQL privately in your browser.

The tool supports major SQL dialects (standard SQL, MySQL, PostgreSQL, SQLite, SQL Server), customizable indentation, uppercase/lowercase keyword formatting, handles subqueries and CTEs with proper nesting, and formats complex JOIN, WHERE, and GROUP BY clauses clearly. It preserves comments and string literals while reformatting the query structure.

Best for: formatting and beautifying SQL queries. Supports multiple dialects, keyword capitalization, subquery indentation. Zero data exposure. Fully private.

How to Format SQL

Paste your SQL query into the input field. SQL can be unformatted, minified, or already formatted

Select SQL dialect (MySQL, PostgreSQL, SQLite, etc.) and set indent size (2, 4, or 8 spaces). Different dialects may format slightly differently

Click 'Format SQL' to format your query. Review formatted SQL with proper indentation and line breaks. Copy the result to clipboard

Common Use Cases

Format messy SQL from query builders or code generators for better readability

Clean up SQL queries before code review or collaboration with team members

Format SQL templates or stored procedures for easier editing and maintenance

Prepare SQL code for documentation or tutorials with proper formatting

Standardize SQL formatting across multiple queries in a project

Debug SQL structure issues by viewing properly formatted queries

Format SQL from different databases or sources for consistent style

Features

Format SQL queries with proper indentation and line breaks for readability

Support for multiple SQL dialects: MySQL, PostgreSQL, SQLite, MariaDB, PL/SQL, N1QL, DB2, Redshift, Spark

Customizable indentation size (2, 4, or 8 spaces) for formatting

Automatic keyword and function name casing (uppercase by default)

Preserves SQL structure and content while improving formatting

Handles complex queries with joins, subqueries, and nested structures

100% private—all processing happens in your browser

Limitations & Constraints

Very large SQL files (over 1MB) may process slowly—consider splitting into smaller sections

Formatting may change whitespace—exact whitespace preservation is not guaranteed

Some SQL features or dialect-specific syntax may not format correctly

Stored procedures or complex PL/SQL blocks may have limited formatting support

Some SQL minification or obfuscation may not be fully reversible

Troubleshooting

Formatting fails or shows error

Solution: Check that SQL is valid—malformed SQL may cause formatting errors. Ensure all keywords, table names, and syntax are correct. Try fixing SQL errors first, then format. Some edge cases or unusual SQL structures may not format correctly. Prevention: Validate SQL before formatting if you encounter errors.

Formatted SQL looks wrong or structure is broken

Solution: Formatting preserves SQL structure but may change indentation. If structure looks wrong, check original SQL for errors. Nested queries and joins should format correctly. If formatting breaks functionality, try different dialect or check for SQL syntax errors. Prevention: Test formatted SQL to ensure it still works correctly.

Wrong SQL dialect selected

Solution: Select the correct SQL dialect for your database. Different dialects have different syntax rules, and formatting may vary. For example, MySQL uses backticks for identifiers, while PostgreSQL uses double quotes. Select the dialect that matches your database system. Prevention: Know your database system and select the matching dialect.

Processing is slow for large SQL files

Solution: Very large SQL files (over 1MB) may process slowly. Split SQL into smaller sections and format separately, or wait for processing to complete. Close other browser tabs to free up resources. For extremely large files, use desktop SQL formatters. Prevention: Format SQL in smaller sections if files are very large.

Keywords or function names not capitalized correctly

Solution: The tool automatically capitalizes keywords and function names (uppercase by default). This is standard SQL formatting. If you need different casing, the tool may not support custom keyword casing. Most SQL formatters use uppercase keywords for consistency. Prevention: Understand that keyword casing is standardized—uppercase is the SQL convention.