SQL Formatter - Format SQL Queries Online Free

How to Use the SQL Formatter

1. Paste your SQL — copy and paste any SQL query into the input area (SELECT, INSERT, UPDATE, DELETE, or DDL statements all work)
2. Choose indentation — select 2-space or 4-space indentation based on your team’s coding standards
3. Click Format — instantly beautifies your SQL with proper line breaks, alignment, and keyword capitalization
4. Review the output — check that the formatted query is logically correct and easier to read
5. Copy the result — one-click copy of the formatted SQL, ready to paste into your codebase or query editor

Well-formatted SQL is easier to read, debug, and maintain. Supports SELECT, INSERT, UPDATE, DELETE, JOIN, GROUP BY, ORDER BY, and common DDL statements.

Features

• Keyword uppercase — automatically capitalizes SQL keywords (SELECT, FROM, WHERE, JOIN, etc.) for readability
• Smart indentation — aligns columns, clauses, and subqueries in a readable tree structure
• Custom spacing — choose between 2-space or 4-space indentation to match your team’s style guide
• Error detection — highlights syntax issues that may cause your query to fail
• One-click copy — copy the formatted SQL to your clipboard instantly
• Support for complex queries — handles subqueries, CTEs, UNIONs, CASE statements, and window functions

Use Cases

• Code review — format unreadable queries before submitting for team code review
• Debugging — properly indented SQL makes it easier to spot missing joins, misplaced WHERE clauses, and parenthesis mismatches
• Documentation — create clean, readable SQL examples for documentation and knowledge base articles
• Migration scripts — format long migration SQL into readable, maintainable scripts
• Learning — paste poorly formatted queries to see how proper formatting improves readability

FAQ

What SQL dialects does this formatter support?

The formatter works with standard SQL and is compatible with MySQL, PostgreSQL, SQLite, SQL Server, Oracle, and BigQuery syntax. Specialized dialect features may not always format perfectly.

Why should I format my SQL?

Formatted SQL is significantly easier to read, debug, and maintain. A properly indented query lets you quickly see the structure — which clauses belong to which subquery, where JOINs connect, and how the logical flow works.

Does the formatter fix my SQL if it has errors?

The formatter highlights syntax issues but won’t fix logic errors. It can tell you if there’s a missing keyword or unmatched parenthesis, but you’ll need to fix the actual logic yourself.

Can I use this for very large queries?

Yes, but performance may vary with extremely long queries (1000+ lines). For the best experience, format large queries in logical sections rather than all at once.

Tips

• Use 2-space indentation if you work with deeply nested subqueries — it keeps lines shorter
• Always review formatted SQL before running it — formatting can sometimes make hidden logic issues more apparent
• Run your formatted query through a linter to ensure it matches your team’s SQL style guide
• Format SQL before storing it in version control to keep diffs clean and reviewable