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Products/Developer Tools/CodePenQuietVC Report ↗
CodePen

CodePen

CodePen is an online integrated development environment for writing and testing HTML, CSS, and JavaScript code directly in your browser

Developer Tools·Launched Jan 2014·0 upvotes·codepen.io
▲Upvote0Visit Website↗
UNVERIFIEDlast checked Jul 12, 2026 · HTTP 403
CohortClass of 2014

What it is

CodePen is an online integrated development environment for writing and testing HTML, CSS, and JavaScript code directly in your browser. It provides real-time preview of code changes, making it ideal for prototyping, learning, and sharing web projects with the community.

HTTP liveness

9 probes since Jun 16
Jun 16Jul 12
AliveHard-dead (404/5xx/parked)RedirectedUnverified (timeout/DNS/block)

Observed events

probes · press · GitHub
  1. Jul 4, 2026
    Probe inconclusive
    Cloudflare block
  2. Jun 23, 2026
    Back online
    Alive · 200 OK
  3. Jun 20, 2026
    Probe inconclusive
    Cloudflare block
  4. Jun 19, 2026
    Back online
    Alive · 200 OK
  5. Jun 16, 2026
    First probe — unverified
    Cloudflare block

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VitalsQuiet
Upvotes
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Press
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Tags
Pulse Indexobserved activity
9 probes0 pressGitHub –Tranco –

Not enough observed signals for a Pulse Index (needs 2+ signal families).

Cohort survival · Class of 2014weekly

10,235 products launched in 2014 · 99% still active

10,131 active104 sunset
Still active
99%
Median lifespan
4.9y