JSONing Mock API

What it does

Free and open-source fake API to test and prototype. It allows you to instantly generate a fully functional API from any JSON object. You can create rules to handle errors and customize HTTP codes, headers, and responses. The tool is completely free to use, and you can access the source code to run it locally.

• 
  Mock API Generator2021 · ▲548

  Generate custom data & API to build apps in less than 30s

• 
  JSON url2022 · ▲119

  Mock backend with JSON generated from URL

• 
  Fake API for DevsNov 2025 · ▲8

  Free mock api generator for developers | instant test data

• 
  FakeURL2025 · ▲6

  Free online api mocking tool | mock api generator

• 
  JSON Generator2014 · ▲139

  Create mock and sample JSON using a powerful template syntax

• 
  JSON Api2020 · ▲175

  Hosted API's to develop your app for free 🙌

• 
  Dograh▲592

  The open source VAPI alternative

  Dev tools · 26d ago · dograh.com

• 
  Meridian▲530

  Don't let your work go unnoticed. Get promoted!

  Dev tools · 21d ago · meridiona.com

• 
  x1▲516

  Lovable for iPhone apps go from idea to App Store

  Dev tools · 12d ago · x1.new

• 
  Open-Source eInk Bike Computer▲408

  OpenTrailPaper is open-source bike computer firmware for the LilyGO T5S3 4.7" E-Paper PRO. It supports offline maps, GPX routes, FIT recording and Bluetooth sensors.

  Dev tools · 2d ago · opentrailpaper.com

• 
  The GTM Co-Founder▲402

  Open-source GTM skills for technical founders

  Dev tools · 30d ago · gtmcofounder.com

• 
  Nuphos▲380

  The AI-Native DevOps Workspace.

  Dev tools · 25d ago · nuphos.ai

• 
  Guideflow▲1,341

  The AI demo automation platform for SaaS

  AI · Nov 2025 · guideflow.com

• IB
  I built a synth for my daughter▲1,278

  Life & fun · Nov 2025 · bitsnpieces.dev

• 
  Welltory▲1,030

  Stop energy drain

  Work · Nov 2025 · welltory.com

• 
  Gemini 3▲1,007

  Bring any idea to life with multimodal capabilities

  AI · Nov 2025 · blog.google

• 
  TrustMRR▲836

  The database of verified startup revenues

  Growth · Nov 2025 · trustmrr.com

• B
  Boing▲782

  Life & fun · Nov 2025 · boing.greg.technology