Dev tools · alternatives · 2026

24 alternatives to Generate JSON mock data for testing/initial app development

Easily create complex JSON data structures using intuitive templates.

JSONGenerator is a development tool that creates mock JSON data for testing and initial app development. It helps developers quickly generate realistic sample data without manual creation. The tool is designed for… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Generate JSON mock data for testing/initial app development launched in 2023; newer entries below may have overtaken it.

1
JSON Generator▲139
Create mock and sample JSON using a powerful template syntax
2014 · json-generator.com · its alternatives →
2
Mock API Generator▲555
Generate custom data & API to build apps in less than 30s
2021 · retool.com · its alternatives →
3
Mockaroo▲354
A realistic data generator to test your app
2015 · mockaroo.com · its alternatives →
4
Mock Turtle▲72
GUI approach to generating realistic mock JSON data
2022 · mockturtle.net · its alternatives →
5
Generate JSON▲77
AI-generated dummy JSON - deploy in seconds
2023 · jsonviewer.stack.hu · its alternatives →
6
Pollux▲82
Fake json data & json server mock API generator with JWT
2021 · mohammedal-rowad.github.io · its alternatives →
7
MockThis▲80
Generate mock data using AI
2023 · its alternatives →
8
JSONMocker – generate JSON mock data by writing reusable JSON schemas▲5
An easy to use web-based editor to create reusable json mock data schema files.
2023 · laurawebdev.github.io · its alternatives →
9
Data Populator▲149
Sketch and XD plugin to populate mockups with real data.
2019 · datapopulator.com · its alternatives →
10
Mock Data Generator▲4
Paste real JSON, get 1,000 coherent rows that match it
Jun 2026 · jsondevtools.org · its alternatives →
11
JSON Generator▲8
Tool for generating random data
2019 · next.json-generator.com · its alternatives →
12GT
Generate test data for your database tables▲57
2013 · databasetestdata.com · its alternatives →
13
JSON Crack▲70
Simple visualization tool for your JSON data.
2022 · jsoncrack.com · its alternatives →
14
My first open-source project release – RandomJson▲56
Provides a Kotlin/Java library to create a random json string - mangatmodi/RandomJson
2019 · github.com · its alternatives →
15
JSONverify▲92
A web tool that validates and format JSON objects
2021 · jsonverify.com · its alternatives →
16JA
JsonTree, a 3.53kb JavaScript tool for generating html trees from JSON▲78
a lightweight dependency free javascript micro-library for making collapsable trees with JSON
2017 · maxleiter.github.io · its alternatives →
17
Types Generator▲61
Types generator will auto generate TS Interfaces from JSON
2022 · vineethtrv.github.io · its alternatives →
18
Data Mock Generator▲3
Generate Realistic Test Data — Instantly.
Nov 2025 · data-mock-generator.com · its alternatives →
19
I created a lightweight JavaScript library to visualize JSON as a graph▲62
Effortlessly visualize JSON structures as dynamic tree diagrams - The-01-Company/jsontr.ee
2024 · github.com · its alternatives →
20
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 →
21
Jsontooncraft▲4
Your complete developer toolkit.
Nov 2025 · jsontooncraft.com · its alternatives →
22JH
JSONator – HTTP endpoints for mock data▲7
2014 · jsonator.herokuapp.com · its alternatives →
23
MockDataGenerator▲6
Mockdata in 10 seconds. 99¢/ export. JSON / CSV / SQL INSERT
2025 · mockdata-generator.toolsfor99cents.com · its alternatives →
24
Jsonviewer▲9
JSONNinja – A Next‑Gen JSON Viewer for Developers
2025 · v2.jsonninja.tools · 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 →