SQL Formatter

A SQL formatter re-indents a query and standardises keyword casing and line breaks so its structure — clauses, joins, sub-queries — is easy to scan. Consistent formatting makes long queries reviewable, reduces mistakes, and keeps diffs clean when queries live in version control.

Different databases extend SQL with their own keywords and syntax, so picking the right dialect produces the most accurate result. This formatter runs entirely in your browser, so even queries containing table names or business logic never leave your device.

Most unreadable SQL was never typed by a person. ORMs and query builders emit statements as a single long line; logging and monitoring tools strip line breaks when they capture queries; and BI tools generate SQL with machine-made aliases. When one of those queries misbehaves, formatting it is the natural first step — once each clause sits on its own line, you can actually see which join exploded the row count or where a filter went missing.

The conventions a formatter applies have a logic behind them. Uppercase keywords date from the era before syntax highlighting, when capitals were the only way to make SELECT and WHERE stand out from table and column names — and the habit stuck because it still helps in plain-text contexts like logs, diffs and documentation. One clause per line, with indentation showing nesting, mirrors how you reason about a query: what am I selecting, from where, filtered how.