In-page Term Gloss on Highlight

Highlight and annotate on the web while instantly explaining the jargon that blocks you

Problem

When reading long articles, unfamiliar terms from other fields force you to open a new tab to search or ask an AI, then jump back. A Chrome extension already bundles highlighting, annotations, and term explanations with Obsidian export, and another discovers idioms while reading, proving in-context comprehension is worth a lightweight tool.

Solution

Select any word or phrase and a hover card shows a concise, context-aware definition, origin, and related concepts without leaving the page. Highlights flow into a local note library with one-click Markdown export, and processing defaults to local or on-demand model calls.

Users

Cross-disciplinary readers, students, researchers and writers, anyone reading long English articles

MVP

Hover card explaining any selection; short context-aware definitions; highlight and annotation; Obsidian Markdown export; local storage with account sync

Revenue

Free local version with subscription for cloud sync, model quotas, and multi-device; browser store promotion targeting reading workflows

Why now

Model costs for explaining long-tail terms are very low and browser extension distribution is mature; readers are tired of tab-switching, and an indie dev can ship a smooth select-to-explain experience quickly.