SQL Formatter & Validator
Paste SQL to format, validate and sanitise Unicode characters. Everything runs offline in your browser — your queries never leave the device.
All processing happens locally in your browser. No data is sent to a server.
The sql formatter cleans up raw SQL code, adds consistent indentation, line breaks, and highlights syntax errors instantly, all inside the visitor’s browser. No data is sent to a server, so your queries stay private and the tool works offline.
Use it when you copy a query from logs, documentation, or a colleague and need to make it readable for debugging or code review. It supports common dialects such as MySQL, PostgreSQL, SQL Server, and SQLite, and will point out missing commas, unmatched parentheses, or misspelled keywords. The formatter does not execute queries, connect to databases, or rewrite logic—it only restructures the text and checks basic syntax.
Because processing happens locally, the response is immediate and the page can be used without an internet connection after the initial load. Paste your SQL, click “Format”, and the cleaned‑up version appears ready for copy‑pasting.
How to Use SQL Formatter
- Paste your SQL query — Insert the raw SQL text into the input area.
- Select the SQL dialect — Choose MySQL, PostgreSQL, SQL Server, SQLite, or let the tool auto‑detect.
- Click Format — The tool will reindent, add line breaks, and highlight any syntax issues.
- Review and copy — Check the formatted output for readability and copy it to your clipboard.
- Validate (optional) — Press the Validate button to run a syntax check without reformatting.
Frequently Asked Questions
Can the sql formatter handle very large queries?
Yes, the formatter processes the text in the browser, so it can handle queries of several hundred kilobytes. Extremely large scripts may take a few seconds, but no server limits apply.
Does the tool store my SQL on a server?
No. All formatting and validation happen locally in your browser. Nothing is uploaded, logged, or stored on any remote server, ensuring complete privacy. Everything executes locally in your browser with zero server uploads, keeping all your sql formatter workflows fast, dependable, and completely private.
Which SQL dialects are supported?
The formatter recognizes MySQL, PostgreSQL, Microsoft SQL Server, SQLite, and generic ANSI‑SQL. You can manually select a dialect to improve keyword highlighting and error detection.
Can I use the sql formatter offline?
After the initial page load, the tool works entirely offline because it runs in JavaScript within your browser. No internet connection is required to format or validate queries.
Will the formatter fix logical errors in my query?
No. The sql formatter only restructures the text and checks for basic syntax problems. It cannot detect or correct logical mistakes such as incorrect joins or wrong column names.