4.8k stars · MIT · v0.18.0 (2026-06-29)
One command Lighthouse-scans every page of a site and ranks what to fix. npx, nothing to host.
▶Repo detailsthe review · specs · pros & cons · install
What it is
A tool that runs Google Lighthouse across an entire site rather than one URL at a time, crawling pages in parallel and collecting performance, accessibility, SEO and best-practice scores into a single sortable report. It runs through npx, so there is nothing to install permanently.
Why it matters
Grasppy is a heavy React app, and heavy React apps quietly fail the Core Web Vitals that Google feeds into ranking — usually on the exact marketing pages that most need to rank. This tells you which pages are slow, which are missing meta descriptions, which have broken links, sorted worst-first, in about five minutes. It is the least glamorous entry here and one of very few that produces a concrete to-do list you can hand straight to Claude Code.
npx unlighthouse --site yoursite.comand you are done. No install, no account, no config file- Scans the whole site — that is the difference from PageSpeed Insights, which does one URL
- MIT, actively maintained, and the report is genuinely readable
- It reports, it does not fix — and some React performance fixes are real work
- Scanning is CPU-heavy. Run it on your Mac, not on the VPS that is serving your users
- Scores are a proxy, not revenue. Do not let chasing a green 100 crowd out writing content
Grasppy is a heavy React app, and heavy React apps quietly fail the Core Web Vitals that Google feeds into ranking — usually on the exact marketing pages that most need to rank.
Standalone tool, run from the terminal against the live site.
