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mark.js
A lightweight web application that enables users to dynamically highlight and mark specific keywords within web content
verified Jul 12, 2026 · HTTP 200
CohortClass of 2016What it is
A lightweight web application that enables users to dynamically highlight and mark specific keywords within web content. Designed to improve reading comprehension and information scanning by visually emphasizing relevant terms in real-time.
HTTP liveness
9 probes since Jun 16Jun 16Jul 12
AliveHard-dead (404/5xx/parked)RedirectedUnverified (timeout/DNS/block)
Observed events
probes · press · GitHub- Jun 16, 2026First probe — liveAlive · 200 OK
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Pulse Indexobserved activity
9 probes0 pressGitHub –Tranco –
Not enough observed signals for a Pulse Index (needs 2+ signal families).
Cohort survival · Class of 2016weekly
13,657 products launched in 2016 · 100% still active
13,633 active24 sunset
Still active
100%
Median lifespan
4.9y