SQL-Format.io is a free online SQL formatter built by database administrators who wanted consistent, readable queries across teams. Paste any SELECT, INSERT, UPDATE, or DDL statement into the editor, choose indentation width, keyword case, comma placement, and line-break rules, then format the text on the server without installing an IDE plugin or signing up for an account.

For example, drop a 200-line stored procedure with inconsistent casing and trailing commas, set keywords to uppercase with four-space indent and commas after each column, and receive a normalized script suitable for code review or wiki documentation. The formatter respects dialect hints, caps extremely large inputs at twenty thousand lines for stability, and returns syntax-aware errors instead of silently mangling invalid SQL.

Formatted output appears in the same editor so you can copy it with one click or reset to start over. Your last SQL text and option toggles persist in browser localStorage after a successful format. The tool runs entirely through CSRF-protected POST actions on our Django backend—no client-side parsing logic that could diverge from the server rules.