JSONLint is the free online validator and reformatter tool for JSON, a lightweight data-interchange format.
Mockoon is a desktop application allowing to quickly mock servers and API.
Mock an entire backend with minimal coding. Easily create custom HTTP resources complete with fake data. FakeJSON's API scales with your development needs, helping you test and develop more
Generate any random data you want with power of agile templates and save it to our servers for later use. A great tool for generating mock data for your app, demo or theme template.
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