An extensible JSON viewer, editor, formatter, validator and more

In plain words

An extensible JSON viewer, editor, formatter, and validator that runs on GitHub. The tool allows users to view, edit, and format JSON data while validating syntax. It supports extensibility, meaning users can add custom features or plugins to suit their specific needs. The product is designed for developers and anyone working with JSON files who needs a straightforward way to manage and verify their code without leaving their browser or development environment.

written from the facts on this page · September 2026

• 
  JSON Formatter and Validator2022 · jsonformatter.net · ▲81

  Useful JSON online tools

• 
  JSON Editor 1.02023 · chromewebstore.google.com · ▲78

  Effortless JSON Editing, Anywhere!

• 
  JSON Viewer2025 · jsonviewer.run · ▲6

  Free online json formatter, validator & viewer tool

• 
  Json Sage2025 · jsonsage.com · ▲6

  Free online json viewer, editor & validator

• 
  JSON Formatter & Validator2025 · json.toolaska.com · ▲6

  Free online json tools with syntax highlighting

• 
  JSON Formatter and validator2025 · ▲18

  free online Json formatter and validator

• 
  SimCity, but with Permits▲887

  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 · 24h 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

• 
  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

• 
  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

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

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

• 
  Exploding Topics▲949

  Find proven topics before they take off.

  Growth · 2019 · explodingtopics.com

• AA
  Angeldust – a fast and efficient video game▲716

  After years of solo development I'm presenting: Angeldust, an omni-compatible action RPG and building game! Website: http://angeldu.st My single server hosts 250+K active players in one giant, dynamic fantasy world. Angeldust's game server is pervasively multithreaded, implementing John Carmack's dream of processing an immutable world state each tick. Both world handling and network traffic routing uses any number of threads. For networking, a typical game session only uses ~3Kbps of bandwidth, enabling decent play even over 2G/EDGE networks. The client is programmed in C++…

  Growth · 2019

• AS
  A searchable list of self-hosted software with screenshots▲656

  Dev tools · 2019 · selfhostedsource.tech

• 
  A tiny isometric city builder in JavaScript▲593

  A isometric city builder in JavaScript. Contribute to victorqribeiro/isocity development by creating an account on GitHub.

  Dev tools · 2019 · github.com

• 
  AI Dungeon 2 – AI-generated text adventure built with 1.5B param GPT-2▲584

  Play and create AI-generated adventures with infinite possibilities.

  AI · 2019 · aidungeon.io

• 
  Mailmeteor▲567

  Send hundreds of personalized emails with Gmail.

  Growth · 2019 · mailmeteor.com