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JSON Placeholder VS FastAPI

Compare JSON Placeholder VS FastAPI and see what are their differences

JSON Placeholder logo 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.

FastAPI logo FastAPI

FastAPI is an Open Source, modern, fast (high-performance), web framework for building APIs with Python 3.6+ based on standard Python type hints.
  • JSON Placeholder Landing page
    Landing page //
    2022-01-17
  • FastAPI Landing page
    Landing page //
    2023-05-14

JSON Placeholder features and specs

  • Free to Use
    JSON Placeholder is completely free for developers to use. There are no fees or subscription costs, which makes it accessible for anyone needing mock data quickly.
  • Reliable and Well-Maintained
    The API is maintained and kept up-to-date, ensuring that developers can rely on it for consistent performance and uptime.
  • Ease of Use
    The service is user-friendly, with clear documentation and straightforward endpoints, making it easy for developers to integrate and work with.
  • Variety of Data Types
    JSON Placeholder provides different types of data such as users, posts, comments, and todos, suitable for a variety of testing scenarios.
  • No Authentication Required
    The API does not require any form of authentication, which simplifies the process of making requests and testing applications.
  • Common Data Model
    The data model used by JSON Placeholder represents common entities often found in real-world applications, making it practical for most development purposes.

Possible disadvantages of JSON Placeholder

  • Static Data
    The data provided by JSON Placeholder is static and does not change, which can limit its usefulness for testing applications that require dynamic data.
  • Not Real Data
    The information provided is entirely fictional and may not accurately represent real-world scenarios, potentially leading to less realistic testing environments.
  • Limited Data Size
    The amount of data available is limited, which may not be sufficient for testing applications that require large datasets.
  • No Custom Data Generation
    JSON Placeholder does not offer features to generate custom datasets, which can be a limitation for developers who need specific data formats or structures.
  • Lack of Advanced Features
    The API offers basic CRUD operations but lacks advanced features like filtering, sorting, or pagination, which may be necessary for some testing scenarios.

FastAPI features and specs

  • High Performance
    Built on Starlette and Pydantic, FastAPI is one of the fastest frameworks for Python, providing high performance due to its asynchronous request handling.
  • Automatic Interactive API Documentation
    FastAPI automatically generates interactive API documentation via Swagger UI and ReDoc, which are very helpful for development and testing.
  • Type Checking and Validation
    With Pydantic models and Python type hints, FastAPI provides automatic data validation and type checking, reducing the chance of runtime errors.
  • Ease of Use
    Its syntax and design make it easy to learn for Python developers, offering a smooth development experience while reducing boilerplate code.
  • Asynchronous Support
    FastAPI supports asynchronous programming, allowing for better performance for I/O-bound operations, making it optimal for handling many simultaneous connections.
  • Extensive Documentation
    It has comprehensive and well-structured documentation, which is very useful for both beginners and advanced users.
  • Community and Ecosystem
    FastAPI has a growing community and ecosystem, with many plugins and integrations available to extend its functionality.

Possible disadvantages of FastAPI

  • Learning Curve for Asynchronous Programming
    Although FastAPI itself is easy to learn, grasping the concepts of asynchronous programming in Python can be challenging for beginners.
  • Complex Dependencies
    Using Pydantic for advanced validation can make the request models complex, requiring a deeper understanding of Pydantic and its functionalities.
  • Early Stage Libraries
    Some third-party libraries and extensions specifically tailored for FastAPI might still be in early stages of development and lack long-term stability.
  • Limited Real-World Examples
    Although the documentation is extensive, there might be limited real-world examples and case studies readily available compared to more mature frameworks.
  • Deployment Complexity
    Deploying FastAPI applications might be more complex in comparison to traditional synchronous frameworks, mainly due to the need for asynchronous server setups.

Analysis of JSON Placeholder

Overall verdict

  • Yes, JSON Placeholder is a good tool for developers looking for a simple and quick solution to test and prototype applications without the need for a backend during early-stage development.

Why this product is good

  • JSON Placeholder is a widely used online fake REST API for testing and prototyping. It provides developers with an easy way to simulate server responses without setting up a backend. This tool is especially useful for front-end developers who need to test their applications with data before an actual API is available. It offers endpoints for typical CRUD operations, making it highly versatile and useful for various testing scenarios.

Recommended for

  • Front-end developers
  • Developers working on prototyping
  • Testing purposes without backend setup
  • Learning and teaching API interactions
  • Quick mock data for demo applications

Analysis of FastAPI

Overall verdict

  • FastAPI is widely regarded as a good choice, especially for applications that require high performance, scalability, and modern Python features. It is suitable for both simple and complex projects, making it a versatile tool in the web development ecosystem.

Why this product is good

  • FastAPI is a modern, fast (high-performance), web framework for building APIs with Python 3.7+ based on standard Python type hints. It is built on top of Starlette for web framework capabilities and Pydantic for data validation and settings management. FastAPI is known for its excellent performance, automatic generation of interactive API documentation (with Swagger and Redoc), and support for asynchronous programming. Developers appreciate its ease of use, detailed documentation, and helpful error messages.

Recommended for

  • Developers building RESTful APIs
  • Teams looking for a high-performance ASGI-based web framework
  • Projects that require asynchronous programming capabilities
  • Applications needing automatic generation of interactive API documentation
  • Python developers who prefer utilizing type hints for code clarity and validation

JSON Placeholder videos

Albums Json Placeholder - Review 4

More videos:

  • Review - JSON PLACEHOLDER - FAKE API

FastAPI videos

FastAPI from the ground up

More videos:

  • Tutorial - 30 Days of Python - Day 14 - Web App with Flask, FastAPI, ngrok, and Invictify - Python TUTORIAL
  • Review - [PT] Python - API com FastAPI - Chat | twitch.tv/codeshow

Category Popularity

0-100% (relative to JSON Placeholder and FastAPI)
Development
100 100%
0% 0
Developer Tools
11 11%
89% 89
Online Services
100 100%
0% 0
Web Frameworks
0 0%
100% 100

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Reviews

These are some of the external sources and on-site user reviews we've used to compare JSON Placeholder and FastAPI

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FastAPI Reviews

The 20 Best Laravel Alternatives for Web Development
FastAPI, as the name hints, is a swift mover. Built on Starlette, itโ€™s all about speed and performance with Python. Crafting API masterpieces at the speed of light, now thatโ€™s something.
25 Python Frameworks to Master
Since its release in 2018, it has rapidly gained popularity due to its great performance and simplicity. In fact, according to PyPi Stats, FastAPI has over 9 million monthly downloads, surpassing even full-stack frameworks like Django.
Source: kinsta.com
3 Web Frameworks to Use With Python
myapp/ is the main directory of your FastAPI application. It includes all the other files and directories needed for the application.static/ is a directory used to store static assets such as CSS, JavaScript, and image files. These assets are served directly by the web server and are typically used to add visual styling and interactivity to the application.css/, img/, js/...
Best Alternatives to FastAPI App Free for Windows (2021)
FastAPI Alternative โ€“ So many alternatives app to FastAPI that you must to know out there. And, looking for an ideal software was not easy matter. Lucky you, at this page you can find the best replacement app for FastAPI. So what you are waiting for, get the latest FastAPI alternative app for Windows 10 from this page.
Top 5 Back-End Frameworks to Consider for Web Development in 2021
FastAPI is a modern, fast (high-performance), web framework for building APIs with Python 3.6+ based on standard Python type hints. It is fast when compared to other major Python frameworks like Flask and Django. FastAPI gives great flexibility to fulfill businessesโ€™ API needs in todayโ€™s evolving world.

Social recommendations and mentions

Based on our record, FastAPI should be more popular than JSON Placeholder. It has been mentiond 298 times since March 2021. 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.

JSON Placeholder mentions (167)

  • Building a Production-Ready Todo List with Kotlin & Jetpack Compose: Modern Android Architecture & Testing
    Class KtorTodoRepository( private val client: HttpClient, private val baseUrl: String = "https://jsonplaceholder.typicode.com" ): TodoRepository { override suspend fun fetchTodosPage(start: Int, limit: Int): List { val url = "$baseUrl/todos?_start=$start&_limit=$limit" return client.get(url).body() // Auto-deserialization magic! } companion object { fun... - Source: dev.to / 21 days ago
  • Master API Load Testing with Artillery.io: Your APIs Under Fire ๐Ÿ”ฅ
    Config: target: "https://jsonplaceholder.typicode.com" phases: - duration: 60 arrivalRate: 5 name: "Warm up" - duration: 120 arrivalRate: 20 name: "Sustained load" - duration: 60 arrivalRate: 50 name: "Peak traffic" Scenarios: - name: "Get posts" weight: 70 flow: - get: url: "/posts" - think: 2 - get: url:... - Source: dev.to / 24 days ago
  • Mastering React Native with TypeScript: From Basics to Brilliance - Part 3
    Import React, { useEffect, useState } from 'react'; Import { View, Text, Button, FlatList, ActivityIndicator } from 'react-native'; Import axios from 'axios'; Import { NativeStackScreenProps } from '@react-navigation/native-stack'; Import { RootStackParamList } from '../navigation/RootNavigator'; Type Props = NativeStackScreenProps; Interface User { id: number; name: string; } Const HomeScreen: React.FC =... - Source: dev.to / 2 months ago
  • Top 10 JavaScript Libraries and Tools You Canโ€™t Ignore in 2025
    JavaScript continues to dominate web development in 2025, powering dynamic, scalable, and interactive applications. With an ever-evolving ecosystem, developers need tools and libraries that streamline workflows, enhance code quality, and boost performance. This article highlights 10 must-know JavaScript libraries and toolsโ€”Lodash, Axios, Day.js, D3.js, Zustand, Vite, ESLint, Prettier, Chart.js, and React Hook... - Source: dev.to / 2 months ago
  • I-Powered API Testing in Minutes using Keploy Chrome Extension ๐Ÿš€
    JSONPlaceholder A classic test API that simulates posts, comments, users, etc. - Source: dev.to / 3 months ago
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FastAPI mentions (298)

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What are some alternatives?

When comparing JSON Placeholder and FastAPI, you can also consider the following products

JSON Server - Get a full fake REST API with zero coding in less than 30 seconds. For front-end developers who need a quick back-end for prototyping and mocking

Django - The Web framework for perfectionists with deadlines

Mockae - The most flexible way to mock REST APIs with Lua code execution

Flask - a microframework for Python based on Werkzeug, Jinja 2 and good intentions.

ReqRes - A hosted REST-API ready to respond to your AJAX requests.

ExpressJS - Sinatra inspired web development framework for node.js -- insanely fast, flexible, and simple