A query captured from an ORM log or an application trace arrives as one long line with five joins in it, and reviewing that in a pull request is guesswork.
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SQL Formatter
Sql
Free · API · MCPToolYour platform
Use SQL Formatter three ways
The free SQL Formatter on this page works in your browser. The same workflow is available via REST API for apps and via MCP for Cursor, Claude, and other agents — one API key, one plan, one quota. This tool is part of the developer-apis module under Developer Tools.
- Free in browserUse SQL Formatter here — no account required.
- REST APICall from your server with
X-Api-Key. - MCP for agentsConnect Cursor or Claude to ToolYour MCP with the same key.
- 1. Get an API keySign in and open Dashboard → API Keys (works for REST and MCP).
- 2. Call or connectUse the REST API from your server, or paste the MCP URL into your agent config.
- 3. Same qualityOutput matches the free web tool across all three surfaces.
What is SQL Formatter?
A query captured from an ORM log or an application trace arrives as one long line with five joins in it, and reviewing that in a pull request is guesswork. This SQL formatter uppercases recognised keywords, puts each selected column on its own line, and breaks before major clauses such as FROM, WHERE, JOIN, GROUP BY, and ORDER BY so the shape of the statement is visible.
The approach is heuristic rather than dialect-aware: there is no SQL parser behind it, so it does not validate the statement, and vendor-specific constructs — window function syntax, T-SQL hints, BigQuery struct access, PostgreSQL casts — may not break where your team's house formatter would. String literals containing keyword-like words can be affected too, so re-read the output before running it. For a lightweight sanity check on the same statement, SQL Validator flags unbalanced parentheses and missing verbs.
Browser use is free and needs no signup. The same job runs over REST at POST https://api.toolyour.com/api/v1/developer-apis/sql-formatter and over MCP at https://api.toolyour.com/mcp — one API key, one shared monthly credit pool, 1 credit per successful call.
What are common questions about SQL Formatter?
Which SQL dialect does it target?
None specifically. It applies generic heuristics to common keywords, so vendor extensions may not lay out the way your engine's own formatter would.
Does it validate the query?
No. Formatting and validation are separate here. Use SQL Validator for basic structural checks and your database for the real verdict.
Can it affect string literals?
Possibly. Because there is no parser, a literal containing keyword-like words or commas may be reformatted. Check the output before executing it.
What are the key features of SQL Formatter?
Clause-level line breaks
Major clauses start new lines so the statement's shape is immediately readable.
Keyword casing normalised
Recognised keywords are uppercased, separating structure from identifiers visually.
One column per line
Long select lists become reviewable instead of wrapping arbitrarily.
How do you use SQL Formatter?
Paste the statement
A query from an ORM log, a migration, or a pull request.
Format for review
Read the joins and predicates now that the clauses are separated.
Verify before running
Confirm literals are untouched, then execute on your engine.
What formatting exposes in a query
Once clauses are on separate lines, several classic problems become visible without any analysis. Accidental cross joins — a table in the FROM list with no corresponding predicate. Filters in the wrong place — a condition on the right-hand table of a left join placed in WHERE instead of ON, which quietly turns the outer join into an inner one.
Redundant subqueries — the same correlated subquery repeated in the select list and the predicate. Unbounded results — a query with no LIMIT that will happily return the entire table in a review environment. None of these are syntax errors, which is exactly why a person needs to be able to read the query.
Formatting is not correctness
A neatly formatted query can still be wrong, slow, or written for a different dialect. The honest workflow is three steps: format here for readability, run SQL Validator for a quick structural sanity check on parentheses and statement verbs, then execute EXPLAIN on the real database, which is the only tool that knows your schema, indexes, and statistics.
Treat the first two as review aids. They catch mistakes early and cheaply; they never certify that a statement is production-ready.
Which formatter and utility tools sit in this cluster?
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