SQL Formatter
Paste a SQL query to format and beautify it. Runs entirely in your browser — nothing is sent anywhere.
Why does formatting even matter? Read: SQL Formatting Explained
Building a query with user input? Read: Preventing SQL Injection
How it works
This formatter re-indents your query following standard convention: each major clause (SELECT, FROM, JOIN, WHERE, ORDER BY) starts a new line, with columns and conditions stacked and indented underneath — using the open-source sql-formatter library entirely in your browser.
When you’d use this
- Cleaning up a dense, single-line query before a code review
- Making a JOIN-heavy query easier to debug by seeing each clause on its own line
- Formatting SQL consistently across MySQL, PostgreSQL, SQLite, or standard SQL dialects
Common questions
Does formatting change what my query actually does?+
No. Formatting only changes whitespace, line breaks, and keyword casing — it re-arranges how the query looks, not its logic or execution behavior. The formatted output runs identically to your original query.
Which SQL dialect should I choose?+
Pick whichever matches your actual database — MySQL, PostgreSQL, SQLite, or MariaDB. If you're not sure or your query doesn't use dialect-specific syntax, the generic "sql" option handles standard SQL cleanly.
Can I format very long or complex queries with many JOINs?+
Yes — there's no length limit since everything runs in your browser rather than a server. Complex queries with multiple JOINs and subqueries are actually where formatting helps the most, since that's exactly when unformatted SQL becomes hardest to read.
Is my SQL query sent to a server when I use this tool?+
No. The formatting library runs entirely client-side in JavaScript — your query, including any table or column names, stays in your browser and is never transmitted anywhere.