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A testing utility designed to validate and verify web font implementations
verified Jul 13, 2026 · HTTP 200
CohortClass of 2013What it is
A testing utility designed to validate and verify web font implementations. Helps developers ensure proper font rendering across different browsers and devices.
HTTP liveness
9 probes since Jun 16Jun 16Jul 13
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 2013weekly
453 products launched in 2013 · 96% still active
437 active16 sunset
Still active
96%
Median lifespan
4.9y