Fast Keyword Highlighter

Highlights your keyword lists on any page. Stays smooth with 1,000+ keywords. No account, no network.

Fast Keyword Highlighter automatically highlights words from your own lists on any webpage. Built for recruiters and job seekers scanning long postings, content reviewers watching for sensitive terms, SEO and content marketers checking whether target keywords appear, and researchers reading dense pages. Features - Multiple color-coded word lists, each with its own on/off switch, color, whole-word match, and case-sensitive option - Limit a list to specific sites (subdomains, path prefixes, and * wildcards); SPA URL changes are re-checked automatically - Pause highlighting on a site from the popup or from paused-site rules in settings - Import word lists from other highlighter extensions' backups, plain text, or CSV (imported lists are appended) - Export a full JSON backup of your settings and lists - Badge count of highlights on the current page; popup shows top hit words - Jump to next/previous match from the popup or with Alt+Shift+N / Alt+Shift+P (customizable in extension shortcuts) - Toggle highlighting with Alt+Shift+H - Skips inputs, editable regions, and code blocks by default; supports open Shadow DOM - Designed to stay smooth with large lists: on a ~200,000-word test page with 1,000 keywords, highlighting finished in about 350 ms, max long task stayed near page-load baseline (~83 ms), scroll held ~144 fps, and dynamic appends added 0 long tasks Privacy Works entirely on your device. No account. No network requests from the extension. Only two permissions: storage (save your lists and settings locally) and activeTab (show the current site name for pause, and request an on-page hit count). Content scripts run on http/https pages only to read visible text and highlight matches locally. Getting started 1. Pin the extension and open the popup → Manage lists 2. Add a list, paste keywords, pick a color, Save changes 3. Optional: set Only on these sites or pause the current site from the popup