SQL Formatter – Format & Beautify SQL Online (Free Tool)
Free online SQL Formatter tool to format and beautify SQL queries with proper indentation instantly. Clean up messy SQL code, improve readability, and debug complex queries. Supports standard SQL syntax for MySQL, PostgreSQL, SQL Server, and more. All formatting happens locally.
What is SQL Formatter?
SQL Formatter rewrites SQL queries with consistent indentation, keyword casing, and line breaks. Whether your input is a generated query from an ORM, a long ad-hoc analytics query, or a stored procedure pulled from version control, formatting makes the logic much easier to follow. Supports common dialects (PostgreSQL, MySQL, SQL Server, SQLite).
Why use this tool?
- Your data stays private — all processing happens locally in the browser
- No telemetry, no tracking pixels, no third-party scripts
- Open-and-go: bookmark the page once and never look for an alternative
- No telemetry on the tokens, payloads, or code you paste in
- Built for developer workflows: copy-friendly output, syntax-aware highlighting where useful
How to use
- Paste the input you want to process
- Adjust any optional flags or formatting settings
- Run the conversion — everything happens locally in your browser
- Copy the output for use in your project
Examples
Format an ORM-generated query
A 200-character single-line SELECT from Sequelize or SQLAlchemy becomes a multi-line, indented query you can read and tune.
Compare two queries
Format both queries to identical conventions and diff them line-by-line — the only differences are the real ones.
Uppercase keywords
Toggle "uppercase keywords" to enforce SELECT/FROM/WHERE in caps — common style in many SQL style guides.
Common use cases
- Reviewing ORM-generated queries during query optimisation
- Cleaning up ad-hoc analyst queries before committing to a repo
- Producing readable SQL for inclusion in documentation
- Pre-processing for a SQL static-analysis tool that prefers canonical input
- Teaching SQL — the visual structure makes joins and subqueries clearer
Troubleshooting
- Dialect-specific syntax got rejected.
- Switch the SQL dialect in the options. Postgres ARRAY[] or MySQL LIMIT 10, 5 may be invalid in a different dialect.
- Strings got reformatted unexpectedly.
- The formatter should not touch string literal contents. If it does, escape any embedded single quotes or use dollar-quoted strings ($...$ in Postgres).
- CTE / window function indentation looks odd.
- Complex SQL has many valid indentation styles. Try different "indent CTE" or "align args" toggles to match your team's preference.
Frequently Asked Questions
Formatted SQL is easier to read, debug, and maintain. Complex JOINs and subqueries become much more understandable with proper formatting.
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