Dev tools · alternatives · 2026

24 alternatives to Mock API Generator

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

Mock API Generator creates custom REST APIs with read and write endpoints from sample datasets in under 30 seconds. Users can customize data using dozens of datatypes to build testing environments, business… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Mock API Generator launched in 2021; newer entries below may have overtaken it.

1
AI-Powered Mock API Generator▲86
Generate customized, realistic mock data & APIs, via GPT
2023 · its alternatives →
2
Mockaroo▲354
A realistic data generator to test your app
2015 · mockaroo.com · its alternatives →
3
Mock API Generator▲17
API Mocks Prototyping
2020 · mock-api-builder.vercel.app · its alternatives →
4GJ
Generate JSON mock data for testing/initial app development▲103
Easily create complex JSON data structures using intuitive templates.
2023 · jsongenerator.io · its alternatives →
5
Mockable▲114
For rapid API prototyping: create REST/SOAP mocks in 3 sec
2015 · its alternatives →
6
MockThis▲80
Generate mock data using AI
2023 · its alternatives →
7
MockREST – Create REST APIs from Your JSON Content▲12
Mock REST endpoints in seconds. Test without backend delays. Built for developers who need reliable mock data now.
2017 · mockrest.com · its alternatives →
8
apiJuice▲223
Create a hosted API for anything in seconds
2025 · apijuice.com · its alternatives →
9
Pollux▲82
Fake json data & json server mock API generator with JWT
2021 · mohammedal-rowad.github.io · its alternatives →
10
JSON Generator▲139
Create mock and sample JSON using a powerful template syntax
2014 · json-generator.com · its alternatives →
11ST
Simple tool to generate mock APIs for testing▲25
2024 · endpts.io · its alternatives →
12
Akto's Test Editor▲143
Your playground for writing custom API security tests
2023 · akto.io · its alternatives →
13QG
Quickly generate REST API (for Postgres db)▲70
2019 · its alternatives →
14
Web App for generating mocked data from an OpenAPI specification▲19
Progressive Web App for generating mocked data from an OpenAPI specification - Fredx87/openapi-mock-generator
2020 · github.com · its alternatives →
15
A faster way to prototype your APIs using OpenAPI 3 and Swagger UI▲77
A generator for OpenAPI 3. Contribute to egorsmkv/openapi3-generator development by creating an account on GitHub.
2020 · github.com · its alternatives →
16
Simple API Generator (Rest + GraphQL)▲121
Instantly generate openapi (OAS) 3.0.0 REST + GraphQL APIs
2019 · github.com · its alternatives →
17
MockAPI Dog▲122
Instant mock REST & LLM APIs - free, no signup required
Feb 2026 · mockapi.dog · its alternatives →
18
InterimAPI▲68
Custom API endpoints with realistic fake data in seconds
2022 · interimapi.com · its alternatives →
19
Mock Maker▲93
Effortless mock APIs for seamless testing & prototyping
2024 · its alternatives →
20
Fake API for Devs▲8
Free mock api generator for developers | instant test data
Nov 2025 · fakeapifordevs.vercel.app · its alternatives →
21
Mock Turtle▲72
GUI approach to generating realistic mock JSON data
2022 · mockturtle.net · its alternatives →
22
Mocknica - AI-Powered Mock API Server▲8
Create mock APIs in seconds with AI. Ship prototypes faster.
Dec 2025 · mocknica.dev · its alternatives →
23
FakeURL▲6
Free online api mocking tool | mock api generator
2025 · fakeurl.dev · its alternatives →
24
MockAPI▲4
Instant API Mocking for Faster Development
2024 · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →