JSONight

A lightweight JSON editor with Python dict support, built with Tauri v2. Features a split-pane editor with live tree preview, format/minify tools, and a Catppuccin-inspired theme system.

Features

• Split-pane editor with line numbers and live JSON tree preview
• Python dict parsing — paste Python dicts with single quotes, trailing commas, True/False/None and get instant JSON output
• Format & Minify — beautify or compact your JSON in one click
• Collapsible tree view — expand/collapse nested objects and arrays
• Three view modes: Editor & Preview, Editor Only, Preview Only
• Three themes: Dark (Catppuccin Mocha), Light (Catppuccin Latte), System
• Native menu bar: File / Edit / Tools / View with keyboard shortcuts
• File operations: New, Open, Save, Save As via native dialogs
• Status bar: filename with dirty indicator, cursor position, byte count
• Unsaved changes warning on close
• Copy to clipboard button

Quick Start

Prerequisites

Platform	Requirements
All	Rust toolchain (rustup), Node.js 18+
Linux	libwebkit2gtk-4.1-dev, build-essential, libssl-dev, libgtk-3-dev, libayatana-appindicator3-dev, librsvg2-dev
macOS	Xcode Command Line Tools
Windows	Microsoft C++ Build Tools, WebView2

Run (dev mode)

cargo tauri dev

Build (release)

cargo tauri build

Outputs:

• Linux: .deb + .AppImage in src-tauri/target/release/bundle/
• macOS: .dmg in src-tauri/target/release/bundle/
• Windows: .exe installer in src-tauri/target/release/bundle/

Keyboard Shortcuts

Action	Shortcut
New	Cmd/Ctrl+N
Open	Cmd/Ctrl+O
Save	Cmd/Ctrl+S
Save As	Cmd/Ctrl+Shift+S
Format JSON	Cmd/Ctrl+Shift+F
Minify JSON	Cmd/Ctrl+Shift+M
Parse Python Dict	Cmd/Ctrl+Shift+P
Toggle Preview	Cmd/Ctrl+P
Toggle Line Numbers	Cmd/Ctrl+L

CI/CD

Workflow	Trigger	Output
ci.yml	PRs to master	Builds on Linux/macOS/Windows, 14-day artifacts
release.yml	Git tag v*	Builds all platforms, draft GitHub Release

License

MIT