SQL Formatter & Query Beautifier Online Free

About SQL Formatter & Query Beautifier

SQL formatting is mostly a lexical job: collapse runs of whitespace, protect quoted string literals and comments, then insert line breaks before major clauses (SELECT, FROM, WHERE, GROUP BY, ORDER BY, JOIN variants, INSERT, UPDATE, DELETE and so on). Indentation nests sub-clauses and long comma lists so the eye can follow the query plan top-down. Keyword casing is applied only outside string literals — turning select into SELECT is safe in identifiers only when they are not quoted, so the formatter tokenizes quotes first and restores them afterwards via placeholders. Line length heuristics split dense SELECT lists after commas when a line exceeds a comfortable width, while expressions inside parentheses stay intact to avoid breaking function calls. This implementation normalizes whitespace, rebuilds clause boundaries with a curated keyword list ordered longest-first (so LEFT JOIN wins over JOIN), and re-indents every line to the chosen depth. The result is deterministic: the same input always yields the same output, which keeps version-control diffs small when entire teams run the formatter before committing migration scripts. It does not attempt full AST parsing or dialect-specific rewrites such as MySQL backtick normalization — for those, pair it with a dialect-aware linter in CI. What you get is the fast, safe ninety-percent case: legible queries for code review, documentation and stack-overflow answers without installing desktop tooling.