SQL Formatter

Long SQL statements have a habit of arriving as a single unbroken line, usually pasted from application logs or generated by an ORM. Reading a two hundred character query with three joins and a nested subquery in that form is genuinely difficult, and difficulty is where bugs hide, particularly a join condition that was quietly omitted.

Formatting restores structure. Clauses go on their own lines, joins and conditions are indented consistently, and keywords are capitalised so the shape of the query becomes visible at a glance. Once formatted, a missing WHERE clause or a Cartesian join is obvious rather than buried.

Consistent formatting also improves code review and version control. When every query in a repository follows the same layout, a diff shows the logic that changed rather than a reshuffled block of whitespace. Formatting only changes presentation; the statement executes exactly as before, so it is always safe to tidy a query before committing it.

How to use the SQL Formatter

1. Paste the SQL statement, however messy, into the input area.
2. Format it to apply line breaks, indentation and keyword casing.
3. Read through the structured output clause by clause.
4. Check joins and filter conditions now that they are clearly separated.
5. Copy the formatted query back into your editor or documentation.

Examples

• A developer formats a slow query captured from application logs before analysing its execution plan.
• An analyst tidies an inherited report query so a colleague can review it meaningfully.
• A team standardises query formatting across a repository so diffs show real changes.

Frequently asked questions

Does formatting change what the query does?

No. Only whitespace and keyword casing change; the statement executes identically.

Which SQL dialects are supported?

Standard SQL constructs used by common databases format correctly. Highly vendor-specific syntax may format imperfectly but remains valid.

Can it format a stored procedure?

Procedural blocks with control flow may format less tidily than plain statements, but the body will still be readable.

Is my query sent to a server?

No. Formatting runs in your browser, so table names and any embedded values stay local.

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