Free
SQL Tools
Online SQL playground for testing and sharing queries across engines.
sqlplaygroundsharing
SQL Tools
SQL formatters, playgrounds, optimizers, visualizers and learning.
12 tools in SQL Tools
Freemium
SQL Tools
SQL query optimizer and formatter that explains performance issues.
sqloptimizerperformanceindex
Free
explain.dalibo.com
Open SourceSQL Tools
Modern PostgreSQL EXPLAIN plan visualizer by Dalibo.
postgresexplainperformancevisualizer
Free
SQL Tools
Long-standing PostgreSQL EXPLAIN plan analyzer and visualizer.
postgresexplainperformancevisualizer
Free
SQL Tools
Free, structured SQL tutorial from basics to advanced analytics.
sqllearninganalytics
Free
SQL Tools
Classic online tool for testing and sharing SQL queries.
sqlplaygroundsharing
Free
sql-formatter
Open SourceSQL Tools
Popular open-source JavaScript library to format SQL in your apps.
sqlformatterlibraryjavascript
Free
SQL Tools
Interactive lessons for learning SQL basics quickly.
sqllearninginteractive
Free
SQL Tools
Free online SQL formatter and beautifier with many dialect options.
sqlformatterbeautifier
Freemium
SQL Tools
Browser-based SQL client that connects to many databases.
sqlplaygroundsqliteclient
Free
SQL Tools
Interactive SQL tutorial with quizzes for beginners.
sqllearningtutorial
Free
SQL Tools
In-depth guide to SQL indexing and performance tuning.
sqlindexingperformancebook