About

Nexum is a fast, native macOS PostgreSQL client built for developers who want simplicity without sacrificing power.

Connect to any PostgreSQL database, browse schemas and tables in the sidebar, and run SQL queries in a clean, distraction-free editor. Results appear instantly in a high-performance table with JSON drill-down, NULL highlighting, and one-click CSV export.

NEXUM PRO — One-time purchase. No subscription.

Unlimited saved connections
Inline row editing — double-click any cell to edit in place
EXPLAIN ANALYZE with visual cost heatmap
Full query history with search
CSV export for any result set

STANDARD

1 saved connection
Full SQL editor and query runner
Results table with JSON popover
Schema and table browser

Nexum is built entirely with SwiftUI and PostgresNIO — no Electron, no web views, no subscription required.

Core Capabilities

Native macOS SwiftUI app — zero Electron or web views

One-time $19.99 purchase unlocks Pro forever

High-performance NSTableView results for large datasets

JSON / JSONB drill-down in an expandable tree popover

EXPLAIN ANALYZE with per-node cost heatmap

Secure password storage in the system Keychain

SSL/TLS connections with certificate flexibility

Full query history with timestamp, row count, and duration

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Nexum