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Web Code Tools
A developer utility for generating and validating HTML5, CSS3, Open Graph, microdata, Twitter Card, and iframe code snippets
since Jun 16, 2026 · HTTP 200
CohortClass of 2016What it is
A developer utility for generating and validating HTML5, CSS3, Open Graph, microdata, Twitter Card, and iframe code snippets. Streamlines the creation of semantic markup and social media metadata for web projects.
HTTP liveness
9 probes since Jun 16Jun 16Jul 12
AliveHard-dead (404/5xx/parked)RedirectedUnverified (timeout/DNS/block)
Observed events
probes · press · GitHub- Jun 19, 2026Redirected offsiteRedirected offsite
- Jun 17, 2026Probe inconclusiveTimeout
- Jun 16, 2026First probe — redirectedRedirected offsite
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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