Look up words while you read — without leaving the page, signing up, or pasting text into another tab. Contribute to this project at: Github Double-click any word on a web page. A small definition bubble appears next to your cursor with meanings, part of speech, and pronunciation when available. Use the toolbar button to open the full dictionary panel. Type a word, pick a language, and read longer entries with links to Wiktionary.

Fast — definitions show up right where you are reading
Free — no subscription and no API keys to set up
Works on most sites — any normal http or https page
Many languages — Arabic, Chinese (Simplified & Traditional), Czech, Dutch, English (UK & US), French, German, Hindi, Italian, Japanese, Korean, Portuguese (Brazil), Russian, Slovak, Spanish, and Turkish
Listen — tap the speaker icon to hear pronunciation when audio is available
Light or dark — follow your system theme or choose one in settings

Lookup history is optional and stored only on your device
No remote telemetry — usage stats never leave your browser
Words you have looked up before may be cached locally so repeat lookups are quicker

Open Add-ons → Dictionary on Click → Preferences (or right-click the toolbar icon → Manage Extension → Preferences) to change:

Dictionary language and translation target
Theme (system, light, or dark)
Whether to save history
Export or clear history and diagnostics

If a definition looks wrong, use the report button on a lookup — reports stay on your device until you export them. Definitions are fetched from free public sources, mainly Wiktionary. English lookups may also use the Free Dictionary API and Datamuse. Content is shown under their licenses; full attribution is on the options page.

Install the add-on
Pin Dictionary on Click from the puzzle-piece menu in the toolbar
Double-click a word on any page — or click the icon to search manually