About FreeSQLKit
Free online SQL toolkit that respects your privacy. Every operation runs in your browser — your data never leaves your device.
5
SQL Tools
4
SQL Dialects
0
Sign-ups Required
0
Data Sent to Server
Our Tools
SQL Formatter
Format and beautify SQL with keyword capitalization, indentation, and dialect-specific syntax.
Query Builder
Build SQL SELECT queries visually with WHERE, ORDER BY, GROUP BY, HAVING, and LIMIT.
CSV to SQL
Convert CSV data to CREATE TABLE and INSERT statements with auto column type detection.
JSON to SQL
Convert JSON arrays to SQL with auto schema detection and type mapping.
ERD Designer
Visual entity-relationship diagrams with tables, columns, relationships, and SQL generation.
Privacy & Security
100% Browser-Based
All processing happens in your browser. Your SQL, CSV, and JSON data never leaves your device.
Instant Processing
No waiting for server responses. Everything is processed instantly using JavaScript.
Works Everywhere
Use on any device with a modern browser — desktop, tablet, or phone. No installation needed.