SQL Validator & Syntax Checker
Check your SQL syntax before you run it. Paste a query, choose the dialect, and this free SQL checker reports syntax errors with details — entirely in your browser, nothing is uploaded.
Do more than sql validator & syntax checker — meet Chat2DB
Chat2DB is an AI-powered SQL client for Windows, macOS and Linux. Write SQL in natural language, format and optimize queries automatically, and manage MySQL, PostgreSQL, Oracle and 20+ other databases in one workspace.
How to use
- Paste the SQL statement you want to check.
- Select the SQL dialect (MySQL, PostgreSQL, T-SQL...).
- Click Validate SQL to see whether the syntax is valid and where any error is.
Frequently asked questions
What does this SQL syntax checker validate?
It parses your statement with a real SQL grammar for the selected dialect and reports the first syntax error it finds, including what was expected. It checks syntax, not whether tables or columns exist.
Why does valid vendor-specific SQL sometimes fail?
Each database has proprietary extensions. Pick the matching dialect first; if the statement uses a rare extension the parser may not know, verify it against a live connection in a client like Chat2DB.
How can I catch SQL errors while I write queries?
A database IDE validates as you type against your real schema. Chat2DB highlights errors live, autocompletes tables and columns, and can fix or optimize queries with AI.
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