Quick Lookup

Browser extension that answers a selection in place - definitions for a word, an entity card for a name, the sense that fits the page for a technical term - ranked against the page locally, with no account and no model.

Quick Lookup is a browser extension for Chrome, Brave, Edge and Firefox. Select text on any page and a card opens under it with the most useful answer for that kind of text: an English word gets definitions, pronunciation and related words, a name gets an entity card, and a technical term gets the sense that fits the page you are reading.

That last part is why I wrote it. manifest on a page about Iceberg tables is a metadata file, not the everyday adjective, and a dictionary pop-up that does not know what page it is on leads with the wrong meaning. Quick Lookup profiles the page once — title, headings, description — and ranks the senses against it, locally and with no model. The first source it consults is the page itself: a sentence there that defines the selection.

Three cards: a word with its senses, frequency and example sentences; a technical term with the page's own definition and facts from the package registry; a name with a Wikipedia summary

Facts come from data sources — Wiktionary, Wikipedia, Wikidata, Stack Exchange, package registries, MDN and more — and every meaning links to the page it came from. Dictionary packs can be installed for offline look-ups, cards can be kept side by side to compare two words, and a card copies itself as Markdown or as an Anki note. It needs no account; the one optional feature that sends a whole page anywhere, discussing it with Claude, is off until you set it up.

It is open source under the MIT license and is loaded unpacked for now; it is not in a store.