Lume Data

Lume Data is a fast, lightweight, native database IDE. It is written in C on SDL3, so it starts quickly, stays at about 0 % CPU while idle and remains responsive on catalogs with tens of thousands of tables. It works offline and sends nothing unless you turn it on.

Databases

Database	Connect	Browse & edit objects	Table designer	ER diagrams	Execution plans
SQLite	yes	yes	yes	yes	yes
PostgreSQL	yes	yes	yes	yes	yes
MySQL / MariaDB	yes	yes	yes	yes	yes
SQL Server	yes	yes	yes	yes	yes
Oracle	yes	yes	yes	yes	yes

SQLite is built in; the others use the client library installed on your computer (Install).

What is in it

• Connections with passwords in your system's secret store, and DEV / STG / PROD environments and read-only that guard production.
• SQL editor with completion that knows your schema, including whole JOIN ... ON conditions from foreign keys.
• Running SQL in the background with a real cancel, scripts, parameters and history; sessions and transactions that never end by accident.
• Results grid that streams large results, with filters, sorting, charts and a value viewer; data editing reviewed as SQL; export to CSV, TSV, JSON, Markdown, SQL and XLSX.
• Execution Output: every run as events, with errors you can jump to.
• Execution plans as graphs, with findings and index candidates.
• Schema Explorer built for servers with thousands of schemas.
• Object editor and Table Designer: every change is reviewed as SQL before it runs.
• ER diagrams of real foreign keys, for databases of any size.
• Report Studio: KPI, chart and table reports with themes, filters and HTML export.
• Lume Intelligence, an optional AI assistant that only sees what you consent to.
• Source Control: Git status, staging by hunk, commits, branches, pull and push.
• Panels and layouts, a customizable toolbar, the command palette and workspaces.

Start with Install, then Your first connection. The keyboard shortcuts and troubleshooting pages are there when you need them.