Dev tools · alternatives · 2026

24 alternatives to Mock Turtle

GUI approach to generating realistic mock JSON data

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Mock Turtle launched in 2022; newer entries below may have overtaken it.

1GJ
Generate JSON mock data for testing/initial app development▲103
Easily create complex JSON data structures using intuitive templates.
2023 · jsongenerator.io · its alternatives →
2
Mockaroo▲354
A realistic data generator to test your app
2015 · mockaroo.com · its alternatives →
3
JSON Generator▲139
Create mock and sample JSON using a powerful template syntax
2014 · json-generator.com · its alternatives →
4
MockThis▲80
Generate mock data using AI
2023 · its alternatives →
5
Mock API Generator▲555
Generate custom data & API to build apps in less than 30s
2021 · retool.com · its alternatives →
6
Pollux▲82
Fake json data & json server mock API generator with JWT
2021 · mohammedal-rowad.github.io · its alternatives →
7
Data Populator▲149
Sketch and XD plugin to populate mockups with real data.
2019 · datapopulator.com · its alternatives →
8
Mock Data Generator▲4
Paste real JSON, get 1,000 coherent rows that match it
Jun 2026 · jsondevtools.org · its alternatives →
9
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 →
10
Data Mock Generator▲3
Generate Realistic Test Data — Instantly.
Nov 2025 · data-mock-generator.com · its alternatives →
11
JSON url▲119
Mock backend with JSON generated from URL
2022 · jsonurl.com · its alternatives →
12
Mockreate▲66
Figma plugin to generate & customise random data for designs
2022 · figma.com · its alternatives →
13
Generate JSON▲77
AI-generated dummy JSON - deploy in seconds
2023 · jsonviewer.stack.hu · its alternatives →
14
AI-Powered Mock API Generator▲86
Generate customized, realistic mock data & APIs, via GPT
2023 · its alternatives →
15
Mock API Generator▲17
API Mocks Prototyping
2020 · mock-api-builder.vercel.app · its alternatives →
16
JSON For You – Visualize JSON in graph or table views▲211
After two years of improvement, I think it's time to share it with you all. Here’s a quick overview: - Common features include validation, formatting, minification, and more. - Visualize JSON in a graph or table view. - Structured comparison with fallback to text comparison. - Navigate though JSON using JSON pointer. - Supports jq. Would love to hear the community's questions, thoughts and comments!
2024 · github.com · its alternatives →
17
MockBlast▲11
Generate 1M+ rows of SQL/Mongo data instantly & fast.
Jan 2026 · its alternatives →
18
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 →
19
MockDataGenerator▲6
Mockdata in 10 seconds. 99¢/ export. JSON / CSV / SQL INSERT
2025 · mockdata-generator.toolsfor99cents.com · its alternatives →
20
Mock Data▲5
Generate realistic mock data for apps - quick & easy!
2025 · mock-data.com · its alternatives →
21
Loremapis.com▲8
Get mock APIs from your schema
2025 · its alternatives →
22
Mock Data▲4
Generate realistic mock data for apps - quick & easy!
2025 · mock-data.com · its alternatives →
23JA
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 →
24
fetchJSON▲8
Rest api endpoint with custom randomly generated data
2020 · fetchjson.com · 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 →