Fun – unbreakable pen&paper encryption

In plain words

Fun is a pen and paper encryption method designed for casual use. It allows users to encrypt and decrypt messages by hand without requiring digital tools or devices. The system emphasizes simplicity and accessibility, making it suitable for anyone interested in basic cryptography or secure written communication. It launched in 2020 and is available through keychest.net.

written from the facts on this page · September 2026

• 
  CryptoHack2020 · cryptohack.org · ▲81

  A fun platform for learning cryptography

• 
  Cipheroji2024 · sergeykushner.github.io · ▲185

  Encrypting text to emoji

• 
  Cryptle2023 · cryptle.io · ▲60

  A cryptographic word game

• 
  Dust.fun2025 · ▲89

  Coinstar for Crypto, convert low value tokens in your wallet

• 
  Emojicryption2020 · play.google.com · ▲87

  A fun encryptor for your text messages 😋🎉

• 
  Papercrypto2019 · ▲68

  Cryptocurrency Trading Game

• 
  SimCity, but with Permits▲930

  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 · 3d ago · permit.petercai.com

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

  Life & fun · 15d ago · tanzaniaeducationproject.org

• 
  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 · 16d ago · bigwords.page

• 
  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 · 10d 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 · 14d ago · carrierexplode.com

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

  Life & fun · 24d ago · space.bl2.net

• 
  MicroAcquire▲1,552

  A free & anonymous startup acquisition marketplace

  Commerce · 2020 · microacquire.com

• 
  YourStack▲1,251

  A new community for sharing the products you use and ❤️

  Life & fun · 2020 · yourstack.com

• 
  Become an Indie Hacker▲826

  The ultimate resource for starting profitable side projects

  Growth · 2020 · indiehackers.com

• IW
  I wrote a book for engineers that want to become engineering managers▲695

  Hey folks. Last year I was fortunate enough to sign a deal to write a book with my favorite technical publisher, The Pragmatic Bookshelf. When I started out as an Engineering Manager many years ago, I found that there wasn't a huge amount of material that specifically and practically helped me understand how to do my job. When you learn to program there's all of these amazing tutorials, examples and guides, but what was there for new managers? In response to this, a couple of years ago I started a blog over at https://www.theengineeringmanager.com which got a decent amount of…

  Work · 2020

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  Bannerbear▲652

  Auto-generate IG Stories, Pinterest Pins and more

  Growth · 2020 · bannerbear.com

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  byte▲604

  A new looping video app from the founder of Vine

  Growth · 2020