Free SQL Tools Online

A collection of free, privacy-focused SQL and database tools by ChartDB. All tools run entirely in your browser.

SQL Syntax Checker

Validate SQL syntax across multiple database dialects

Beautify and format SQL queries with customizable options

Convert natural language to SQL queries with AI

Compress SQL queries by removing whitespace

Compare SQL queries and see differences

Convert DBML schemas to SQL DDL

Convert SQL DDL to DBML schemas

SQL Query Explainer

Explain SQL queries in plain English with AI

SQL Dialect Converter

Convert SQL between different database dialects

SQL UPDATE Generator

Build UPDATE queries with a visual form builder

SQL COALESCE Generator

Handle NULL values with COALESCE expressions

SQL LIKE Tester

Test LIKE patterns with % and _ wildcards

SQL DELETE Generator

Build DELETE queries with safety warnings

SQL GROUP BY Generator

Build GROUP BY queries with aggregate functions

SQL DISTINCT Generator

Find unique values with SELECT DISTINCT

SQL CASE WHEN Generator

Build conditional expressions with CASE WHEN

SQL JOIN Generator

Build multi-table JOIN queries visually

SQL ORDER BY Generator

Build sorting queries with ORDER BY

SQL BETWEEN Generator

Build range queries with BETWEEN

SQL COUNT Generator

Build COUNT queries with GROUP BY

SQL SUBSTRING Generator

Extract string parts with SUBSTRING

SQL HAVING Generator

Filter grouped results with HAVING clause

SQL IN Generator

Filter with IN and NOT IN clauses

SQL REPLACE Generator

Find and replace text in columns

Customer Testimonials

Don't just take our word for it

Arrigo Lupori

“I already see the value in it as an early customer and can't wait to try more ways to automate these schema diagrams. They are useful for so many reasons as we are investing more and more in great software architecture”

Arrigo Lupori

Co-Founder & Managing Director

Need to visualize your database?

ChartDB helps you visualize your database schema so you can see every table and column at a glance. Understand your data structure before writing queries.

See all columns & typesUnderstand table relationshipsImport from any database

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