SQL Formatter
Paste a SQL query and get it reformatted with each clause (SELECT, FROM, WHERE, JOIN, GROUP BY…) on its own indented line.
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How It Works
A long SQL query written on a single line is hard to scan for structure — where does the WHERE clause end and the GROUP BY begin, which JOIN belongs to which table? This tool takes raw SQL and breaks it onto separate lines at each major clause boundary: SELECT, FROM, WHERE, the whole JOIN family (INNER JOIN, LEFT JOIN, RIGHT JOIN…), GROUP BY, ORDER BY, HAVING, and UNION. Conditions chained with AND/OR, and join conditions after ON, are indented one level under the clause they belong to, and keywords are optionally uppercased for consistency. A query like select id,name from users where active=1 and role='admin' order by name becomes a block with SELECT, FROM, WHERE and ORDER BY each starting their own line and the AND condition indented beneath WHERE — the same information, just laid out the way it would be written by hand in a code review.
This matters most exactly where it is hardest to do by hand: queries with several joined tables, a subquery buried inside a WHERE clause, or a multi-branch CASE expression. Consistent indentation is what lets a reviewer spot a missing join condition or a misplaced parenthesis at a glance instead of reading character by character.
What You Should Know
This is a formatter, not a validator — it only rearranges whitespace and line breaks around a fixed set of keywords it recognizes; it never parses the query into a syntax tree and never executes it against a database. A genuinely dialect-aware validator would need a full parser for each SQL variant, because MySQL, PostgreSQL, SQL Server and SQLite all diverge on details like quoting identifiers, date functions, and even which statements are legal — a shallow browser-side check pretending to validate any of that would only produce false confidence. If the formatted output looks odd, it usually means the input already had a typo or unbalanced parenthesis; the tool will format around it rather than flag it.
Because it operates purely on text layout, it is safe to run on production queries: identifiers, string literals, numeric values and operators are never rewritten, added, or removed — only whitespace changes, plus optional keyword case. Nothing is sent anywhere or executed; the query never leaves the browser.
Frequently Asked Questions
Does this tell me if my SQL is correct?
No — on purpose. Real SQL validation depends on which database you're targeting (MySQL, PostgreSQL, SQL Server all have different syntax quirks), and a lightweight browser tool can't do that honestly. This only reformats layout, it never claims your query is valid or invalid.
Will it break my query?
No — it only inserts line breaks and indentation, and optionally uppercases keywords. The SQL text itself (identifiers, values, operators) is never altered.
Can I use this on any SQL dialect (MySQL, PostgreSQL, SQL Server)?
Yes, at the layout level — the clause keywords this formatter recognizes (SELECT, FROM, WHERE, JOIN, GROUP BY, and so on) are common to virtually every SQL dialect. What it will not do is validate dialect-specific syntax, functions, or quoting rules; those differ enough between engines that only running the query against the real database can confirm correctness.
What happens with subqueries or CTEs?
Nested SELECT statements and WITH (common table expression) blocks are formatted using the same clause-breaking rules recursively, so an inner query gets its own indented structure inside the outer one — which is exactly where formatting helps most, since deeply nested queries are the hardest to read as a single line.
Will formatting change how my query behaves?
No. Only whitespace, line breaks, and optionally keyword casing are touched. Every identifier, literal, comparison and operator stays exactly as written, so the formatted query is functionally identical to the original — it produces the same result set either way.
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