SQL Formatter & Prettifier Online — Free
Runs 100% in your browser — your files never leave your device.
Generated queries and copied logs often arrive as one unreadable line. Pick the database dialect, paste the SQL, and format clauses, columns, conditions, and nested expressions with consistent indentation and keyword casing.
How it works
- 1
Choose the SQL dialect
- 2
Paste the query
- 3
Copy the formatted SQL
About this tool
What formatting fixes
The tool re-renders a SQL statement with keywords capitalized, clauses on their own lines, and indentation showing nesting — turning a one-line query of any length into something a human can review. SQL you can read is SQL you can debug.
When a query needs prettifying
Queries arrive minified from ORMs and logs, inherited from predecessors, or grown too long to hold in your head. Formatting exposes the actual structure: which joins nest where, what the WHERE clauses really combine, and where the missing alias hides.
Read the joins first
In formatted output, the join structure tells you whether a query matches the data model you expected. Cross joins and accidental cartesian products become visible the moment each JOIN starts its own line — that visibility alone catches most slow-query bugs.
Frequently asked questions
Does formatting change how the query runs?
No — whitespace and capitalization are irrelevant to the SQL engine. Formatted and minified versions produce identical results and identical query plans.
Which SQL dialects does it handle?
Standard SQL syntax across the common dialects. Vendor-specific extensions may format imperfectly, but the statement stays valid.
Why capitalize keywords?
Convention, not requirement — uppercase keywords make the statement's skeleton scannable, so clauses and identifiers separate visually at a glance.