SQL Linter by SqlInt

What SQL Linter by SqlInt is

SQL Linter by SqlInt is a free browser tool for reviewing SQL queries as you write or paste them. It flags anti-patterns, unclear references and style issues, including `SELECT *`, comma-style implicit joins and missing `WHERE` clauses. Diagnostics appear live and include a severity, rule code, explanation and line-and-column location. The linter supports Standard SQL (ANSI), PostgreSQL, MySQL, SQLite, BigQuery, Snowflake and SQL Server (T-SQL). One-click fixes can handle formatting, casing and alias issues, while findings such as `SELECT *`, comma joins and ambiguous references still need manual review. Query analysis takes place locally in the browser; pasted SQL is not uploaded for analysis. The tool requires no signup and has no usage limits. SqlInt describes its browser tools as developer utilities that need no installation. Very large scripts with thousands of statements can take longer to analyze. The Free plan costs nothing. SqlInt lists an email address and Contact Us page for questions, feedback or privacy requests.

Who it suits

This tool suits developers who want quick SQL diagnostics in a browser without signing up or installing software. It supports users working with seven listed SQL dialects.

Limits

The Free plan costs nothing and has no usage limits. Very large scripts containing thousands of statements take longer to analyze; some findings still need manual review.

Getting started

1. Open https://sqlint.com/mini-tools/sql-linter in a browser.
2. Paste SQL into the tool.
3. Select the relevant SQL dialect from its supported dialects.
4. Review the live diagnostics and apply one-click fixes where available.

Verdict

SQL Linter offers immediate checks and selected automatic fixes at no cost. Manual review remains necessary for some findings, especially in very large scripts.