JSON Server
JSON Placeholder
mocki Fake JSON API
Mockae
Postman
ReqRes
Parsing JSON in Swift
JsonAPI
FormatJSONOnline
JSONFormatter.org
JSONLint
JSON Formatter & Validator
JSON Editor Online
Easy JSON Viewer
JSONCompare
JSON Comparator
Format JSON Online is a fast, free, and privacy-focused tool to format, validate, minify, and beautify JSON data directly in your browser. Built for developers and API testers, it offers support for large JSON files without requiring login or sending data to a server. Additional features like JSON-to-CSV, JSON-to-XML, and cURL conversion make it a versatile tool for debugging, transforming, and visualizing JSON. Light ads may be introduced in the future to support development, but user privacy and experience will always be top priorities.
JSON Server FormatJSONOnlineNo features have been listed yet.
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FormatJSONOnline's answer:
FormatJSONOnline is used by developers and teams across companies and institutions, though exact names aren’t tracked due to privacy-first architecture. However, notable daily users include:
Developers from GitHub
Engineers at Microsoft (based on public traffic data)
API testers from Postman community
Students from Indian Institutes of Technology (IITs)
Indie hackers and open-source contributors
FormatJSONOnline's answer:
React.js (for UI and client-side rendering)
Tailwind CSS (for fast and clean styling)
Next.js (for performance and SEO)
Vercel (for deployment and CDN optimization)
FormatJSONOnline's answer:
Unlike many JSON tools that are bloated, ad-heavy, or slow, FormatJSONOnline is:
Blazing fast, even for large (20MB+) files
Privacy-focused, with zero data sent to any server
Minimalist and distraction-free
Mobile and tablet responsive It’s designed specifically for developers who value performance and simplicity.
FormatJSONOnline's answer:
The idea came while working on multiple API integrations where formatting large JSON responses quickly became frustrating. Most existing tools either lagged, required uploading sensitive data, or were filled with ads. FormatJSONOnline was built as a clean, fast, and secure alternative that works instantly, with no signup, no tracking, and no BS.
FormatJSONOnline's answer:
The primary audience includes:
Front-end and back-end developers
API testers and engineers
Data analysts and tech leads
Students and hobby coders working with JSON
FormatJSONOnline's answer:
FormatJSONOnline is uniquely optimized for speed, privacy, and simplicity. It processes even large JSON files with minimal delay, works entirely on the client-side (nothing is sent to a server), and offers formatting, validation, minification, and copy-to-clipboard — all in one place with zero tracking or ads.
Based on our record, JSON Server seems to be a lot more popular than FormatJSONOnline. While we know about 45 links to JSON Server, we've tracked only 2 mentions of FormatJSONOnline. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
We'll be using json-server to create the REST API that we'll fetch data from. In the root of the project, create a db.json file with the contents. - Source: dev.to / over 1 year ago
Our backend will be little more than a two-way translation layer between the database and the user interface (UI). Later in this post we will identify other responsibilities of a backend but our implementation will be kept simple to demonstrate the fundamental machinery and concepts. It is worth noting the backend comes in two parts, web server and application server. Both json-server and Express are able to... - Source: dev.to / about 2 years ago
JSON-Server creates fake REST API with a minimum amount of configuration, it provides a simple way to create mock RESTful APIs and easily define the required endpoints, allows easy definition of the data schema in a JSON file and can serve as a reference for each figure in the project. - Source: dev.to / over 2 years ago
I thought about usingJson Server (hosting the repo with the words on Github to begin with), Googlesheets, or maybe Firestore (i would prefer not to use it ,to avoid extra costs just in case it gets a reasonable amount of users). It isnt a big app so I just want a simple solution for storing the words and fetching them. Source: over 2 years ago
First, I didn't create a backend API for this example, but I used a fake API to test. I created it with json-server and json-server-auth. They are two npm packages that use a JSON file as a database and expose the database in an API. You can find more about json-server in its documentation and about json-server-auth here. - Source: dev.to / over 2 years ago
In this guide, you'll learn how to format, validate, and manipulate JSON data in your browser using Format JSON Online, a fast, privacy-first tool for developers. - Source: dev.to / 4 months ago
This list spans the entire frontend dev lifecycle—learning, coding, designing, testing, and deploying. Tools like Format JSON Online are clutch for handling JSON data, a common task when building API-driven apps. Save these links, and you’ll be ready to tackle any frontend challenge! - Source: dev.to / 4 months ago
JSON Placeholder - JSON Placeholder is a modern platform that provides you online REST API, which you can instantly use whenever you need any fake data.
JSONFormatter.org - Online JSON Formatter and JSON Validator will format JSON data, and helps to validate, convert JSON to XML, JSON to CSV. Save and Share JSON
mocki Fake JSON API - mocki Fake JSON API is an advanced platform that offers you to create API for personal use or testing purposes.
JSONLint - JSON Lint is a web based validator and reformatter for JSON, a lightweight data-interchange format.
Mockae - The most flexible way to mock REST APIs with Lua code execution
JSON Formatter & Validator - The JSON Formatter was created to help with debugging.
