Polaris is an Electron desktop translator built for quick reading and comprehension workflows, especially when switching between apps. It combines global shortcut translation, clipboard monitoring, and direct text input in a single lightweight window. Users can translate highlighted text from any application, paste or type manually, review session history, hear speech playback, and see compact floating results—without leaving their current workflow.
Role
Creator & Developer
Year
2026
Category
Desktop / Productivity
Tech Stack
The problem
Note · 01Desktop translation tools often interrupt focus: copy-paste hops, browser tabs, or heavy apps that do not integrate with system-wide selection and clipboard behavior. The challenge was to deliver fast, reliable translation from three input paths (selection, clipboard, typed text) while keeping the renderer sandboxed, IPC contracts explicit, and translation resilient when a free API provider is down or rate-limited.
The approach
Note · 02I structured Polaris across Electron layers: the main process handles lifecycle, tray, global shortcuts, clipboard polling, and IPC; preload exposes a minimal `window.polaris` API with `contextIsolation` enabled; the renderer drives tabs, history, and speech actions; and a dedicated translation service normalizes languages, chunks long text, caches results, and falls back from MyMemory to LibreTranslate. A floating bubble surfaces selected-text results without forcing the main window open, and settings keep utility controls separate from the primary translate flow.
How it was built
Milestones from concept through delivery.
Scoped Polaris as a cross
Implemented main
windows, system tray, global shortcuts, and clipboard monitoring with IPC handlers.
Built preload bridge with explicit, minimal APIs exposed to the renderer under strict context isolation.
Designed renderer UX with Translate, History, and Settings tabs plus Ctrl+Enter submission for manual input.
Integrated translation service with auto
Added floating translation bubble for selected
Documented macOS Accessibility requirements for simulated copy
Added `npm run verify` and electron
Impact
Visuals
Main window with language selectors, provider hints, and manual input—optimized for quick paste-and-translate flows.
Global shortcut configuration, clipboard monitoring toggle, and platform notes for macOS Accessibility permissions.
