The Captcha Experiment

In plain words

The Captcha Experiment is a fun project that turns CAPTCHAs—those security puzzles designed to verify you're human—into an interactive experience. Launched in 2011, it reimagines the typically mundane verification process as entertainment. The project appeals to anyone curious about internet security, puzzles, or quirky web experiments. It stands out by transforming an everyday annoyance into something engaging and playful rather than purely functional.

written from the facts on this page · September 2026

• 
  DOOM Captcha2021 · vivirenremoto.github.io · ▲512

  Captchas don't have to be boring

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  Humans Not Invited2018 · humansnotinvited.com · ▲237

  CAPTCHA that filters out humans and only lets programs pass

• RC
  Replace CAPTCHA with Proof-of-Work2014 · hashcash.io · ▲89
• 
  Captcharoo2023 · captcharoo.com · ▲88

  Proof of humanity, check that you're not talking with an AI

• 
  Are You a Human?2013 · areyouahuman.com · ▲67

  Ending the CAPTCHA agony in a unique way.

• 
  Cap2025 · capjs.js.org · ▲428

  A lightweight, modern open-source captcha

• 
  SimCity, but with Permits▲873

  A free city-building game in your browser. You are the mayor. You know what the city needs. Now get it past the zoning board, the neighbors, the appeals court and the next election.

  Life & fun · 21h ago · permit.petercai.com

• IV
  I've been paying for a rural Tanzanian's education for 10 years▲778

  Life & fun · 13d ago · tanzaniaeducationproject.org

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  Bigwords.page – Turn any screen into a sign. The URL is the app▲728

  Turn a phone, tablet or TV into a sign. Type a message and it fills the screen: welcome signs, timers, Wi-Fi passwords and more. No app, no account, free.

  Life & fun · 14d ago · bigwords.page

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  Guitoro, a virtual guitar you strum with your keyboard▲573

  Play a free virtual guitar online with your keyboard or by touch. Slow songs down and see every chord, string and strum. Acoustic, classic, electric and bass.

  Life & fun · 8d ago · guitoro.com

• 
  See *almost* any carriers phone settings▲432

  Carrier settings from iPhone, Pixel and Galaxy firmware, decoded and compared: APNs, VoLTE, 5G and Wi-Fi Calling per carrier, and what each build changed.

  Life & fun · 12d ago · carrierexplode.com

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  The whole Solar System and every tracked satellite, live in the browser▲407

  Life & fun · 22d ago · space.bl2.net

• EC
  Entire concerts algorithmically "reconstructed" from YouTube videos▲435

  Life & fun · 2011 · switchcam.com

• AO
  An OS X music library I've been working on for the past year.▲301

  Life & fun · 2011 · enqueueapp.com

• WI
  When is good time to submit a story on HN?▲269

  Life & fun · 2011 · hnpickup.appspot.com

• SR
  Scroll Reddit▲240

  The fastest way to browse Reddit.com

  Life & fun · 2011 · scrolldit.com

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  AI tool reads privacy policies, tells you which sites sell your info.▲145

  PrivacyParrot lets you quickly know if a site sells your personal information. Check sites before you register to avoid being spammed.

  AI · 2011 · privacyparrot.com

• V1
  Version 1.1 of our $99 hackable Bluetooth smartwatch▲139

  Life & fun · 2011 · wwww.getinpulse.com