SQL Formatter
Format SQL queries into clean, readable multi-line syntax. Supports MySQL, Postgres, T-SQL, BigQuery and more.
About SQL Formatter
The SQL Formatter reformats a jumbled one-line query into readable, indented, multi-line SQL with consistent keyword casing. It supports MySQL, PostgreSQL, SQL Server, SQLite, BigQuery, Oracle and MariaDB.
Dialect selection matters because quoting, functions and procedural constructs vary between database engines. The formatter applies layout rules appropriate to the chosen dialect while preserving comments and organizing clauses, joins, subqueries and common table expressions.
Formatting only rearranges whitespace and casing — the query executes identically. Everything runs in your browser, which is useful when the statement includes table names, filters or literals from a production incident you do not want to paste into a third-party cloud formatter.
Readable layout does not replace EXPLAIN plans or index review, but it makes it far easier to spot a missing join condition, an accidental Cartesian product, or a WHERE clause that filters the wrong column before you run anything dangerous.
How SQL Formatter works in practice
- 1Paste your SQL query into the input area.
- 2Pick the database dialect.
- 3Choose indentation width and keyword casing.
- 4Click "Format" and copy the tidied query back to your editor.
- 5Use minify only when you deliberately need a compact single-line string for config or logs.
Jobs this tool is built for
- Expand a query copied from application logs into a readable form for debugging.
- Normalize SQL formatting before attaching a query to a code review or incident report.
- Make joins, filters and nested subqueries easier to inspect for logic mistakes.
- Minify a formatted query when a compact single string is needed in configuration.
- Clarify a CTE-heavy analytics query before walking through it with another engineer.
- Recover readable structure from SQL embedded in a monitoring alert or stack-trace field.
What you can do here
- Dialect-aware formatting for all major databases
- Configurable indentation and keyword casing
- Aligns SELECT columns, JOIN conditions and WHERE clauses
- Handles subqueries and CTEs, preserves comments
- Minify option to collapse whitespace
- Fast default path when you do not need per-token style toggles
Limits and honest caveats
- Formatting does not execute, optimize or fully validate SQL. Review the statement and test it against the intended database before use.
- Queries are processed in the browser, so pasted schema names and values are not uploaded by this formatter.
- For strict house-style rules (leading commas, separate function casing), switch to the SQL Beautifier instead of fighting the Formatter defaults.
Common questions about SQL Formatter
Does the formatter change my results?
No — only whitespace and casing change. The query still executes identically.
Can it format stored procedures?
Yes — DECLARE, IF/ELSE and LOOP constructs are handled for popular dialects.
Why should I choose the correct dialect?
Database engines differ in quoting, keywords and procedural syntax. Selecting the target engine helps the parser avoid treating valid dialect-specific syntax incorrectly.
Does formatting protect against SQL injection?
No. Formatting changes presentation only. Use parameterized queries and proper database permissions to prevent injection.
When should I use the SQL Beautifier instead?
Use the Beautifier when your team requires separate casing for keywords, functions and identifiers, or a specific leading/trailing comma policy. The Formatter is the quicker everyday readability tool.
Will comments survive formatting?
Yes — line and block comments are preserved in typical cases so annotated production queries stay documented after reformatting.
This page was written by the ToolSink team to explain how SQL Formatter works on this site — it is not syndicated, scraped, or spun from another publisher. How we write tool guides · Site updates · About ToolSink.
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