Debugging a slow query from ORM logs
Before
One-line query with 5 JOINs, unreadable
After
Formatted with proper indentation, JOINs visible
Spotted a JOIN on an unindexed column in 30 seconds. Added the index, query time dropped from 4s to 90ms.
All Tools
SQL Formatter – Beautify and Format SQL Online
I built this because ORM output and logged queries come out as one giant unreadable line. Paste it, hit Format, and suddenly you can see the JOIN conditions. Works with the SQL dialects I actually use — MySQL, PostgreSQL, SQL Server.
100% free, no signup
Basic keyword-based formatter for readability — not a full SQL parser, so double-check complex nested queries.
Your files are processed in your browser and never uploaded to any server.
A note from me
Most of the messy SQL I deal with comes from ORM logs. My tip: format first, then read the JOIN logic. Nine times out of ten, when a query is slow, the problem is a missing index on a JOIN column — and you can only spot that once the query is readable. Also, formatting never changes query logic, so it's safe to run on production queries before sharing them with a teammate.
— Mirza Noman Baig
How to use this tool
- 1Paste your SQL query into the editor.
- 2Click Format SQL.
- 3Review the indented, readable version.
- 4Copy the clean query for your docs or code.
Real results from testing
These are actual measurements from using this tool, not estimates.
Reviewing a teammate's PR
Before
Raw SQL string in the code, hard to review
After
Formatted version showed the logic clearly
Caught a WHERE clause that would have returned the wrong rows. Would have missed it in the unformatted version.
Documenting a database query
Before
Query copied from a log, messy
After
Clean formatted SQL in the wiki
New developers could actually read what the query did.
SQL Formatter features
Format SQL queries
Clean indentation and line breaks make query logic readable.
Supports multiple dialects
MySQL, PostgreSQL, SQL Server, and standard SQL syntax.
Copy formatted output
One-click copy for pasting into your code or documentation.
Runs locally
Your queries never leave your browser. Safe for sensitive SQL.
Frequently asked questions
Does formatting change my query logic?+
No. Only whitespace and indentation change. The SQL that runs is exactly the same.
Which SQL dialects are supported?+
MySQL, PostgreSQL, SQL Server, and other standard SQL. Common clauses like SELECT, JOIN, WHERE, GROUP BY, and ORDER BY are all handled.
Is my query uploaded anywhere?+
No. Everything runs in your browser. Your SQL never leaves your device.
Can it handle stored procedures?+
It handles standard SQL statements well. For stored procedures with complex procedural logic, formatting support varies.
Does it minify as well as format?+
This tool focuses on formatting. For minification, a different tool is better suited.