Dev tools · alternatives · 2026

24 alternatives to Mockman

Custom AJAX response ( Postman for Frontend)

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Mockman launched in 2020; newer entries below may have overtaken it.

1
JSON url▲119
Mock backend with JSON generated from URL
2022 · jsonurl.com · its alternatives →
2
Interceptor – mock AJAX requests at the browser level▲60
Introducing Interceptor - A browser extension that mocks backend responses and how to use it.
2018 · crypt.codemancers.com · its alternatives →
3
Mock API Generator▲555
Generate custom data & API to build apps in less than 30s
2021 · retool.com · its alternatives →
4
Mocke▲519
Mock email campaigns: know your reply rate without launching
2025 · mocke.co · its alternatives →
5
Mockaroo▲354
A realistic data generator to test your app
2015 · mockaroo.com · its alternatives →
6MO
Mockit – Open-source app to create and configure HTTP mocked endpoints▲158
2019 · mockit.netlify.com · its alternatives →
7
Postman▲182
Postman is a powerful HTTP client to test REST API
2014 · postman.com · its alternatives →
8
Requestly▲148
Debug & Modify HTTP(s) Requests - loved by 125K+ web devs
2019 · requestly.com · its alternatives →
9
Pollux▲82
Fake json data & json server mock API generator with JWT
2021 · mohammedal-rowad.github.io · its alternatives →
10
MockAPI Dog▲122
Instant mock REST & LLM APIs - free, no signup required
Feb 2026 · mockapi.dog · its alternatives →
11MS
Mocktastic – Simple, Offline mock REST APIs for your entire team▲43
2018 · mocktastic.com · its alternatives →
12
Data Populator▲149
Sketch and XD plugin to populate mockups with real data.
2019 · datapopulator.com · its alternatives →
13
HTTP Response API▲102
Test how your code reacts to varying HTTP responses
2023 · http.codes · its alternatives →
14
JSON Generator▲139
Create mock and sample JSON using a powerful template syntax
2014 · json-generator.com · its alternatives →
15GJ
Generate JSON mock data for testing/initial app development▲103
Easily create complex JSON data structures using intuitive templates.
2023 · jsongenerator.io · its alternatives →
16
Temp API▲88
Test your frontend apps with temporary rest APIs
2021 · its alternatives →
17
Mockify
Instant mock APIs for fast frontend development
Mar 2026 · mockify.buildtech.app · its alternatives →
18
Mockoon – mock REST APIs in seconds▲68
Mockoon is the easiest and quickest way to run mock REST API servers. No remote deployment, no account required, free, open source and cross-platform.
2017 · mockoon.com · its alternatives →
19
HTTPretty, an easy way to mock http requests in python▲97
Bid on the RGP-Domain falcao.it. Bid now from €10 and secure the domain at an early stage!
2012 · falcao.it · its alternatives →
20CM
Creating mock data using TypeScript interfaces▲57
2023 · butlermock.online · its alternatives →
21
Mocklets▲82
A HTTP-based API simulator to assist parallel development 🛠️
2018 · mocklets.com · its alternatives →
22
Mockreate▲66
Figma plugin to generate & customise random data for designs
2022 · figma.com · its alternatives →
23
Mocky.io▲9
Mock your HTTP responses to test your REST API
2016 · its alternatives →
24TP
Test Post/Get endpoints easily from your browser▲57
2011 · httpposttool.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 →