No. 5 of 28 ·Test Data Generation Tools

DummyJSON

Web · API

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Freedom report

Two barsScore 6.4

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely1 of 6 device platforms
DocumentedPlans, terms and facts published

DummyJSON is ranked #5 of 28 in test data generation tools on Freedom251. It runs on API, Web. There is a free plan.

DummyJSON plans and pricing

All plans

DummyJSON Free Free fake REST API; no price stated dummyjson.com · 4 Oct 2026

Compared on test data generation tools

Free plan: Yes
Generation modes: synthetic
Relational data: Yes
API data generation: Yes
Supported data formats: JSON
Deployment: cloud

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The record

Purpose: DummyJSON provides fake REST API data for frontend development, building, and testing without backend setup.
Datasets: The site lists products, carts, users, posts, comments, quotes, todos, recipes, images, and authentication resources.
Usage: The documentation says DummyJSON can be used with any type of frontend project needing dummy data in JSON format.
Pagination: Resources support limit, skip, and select query parameters, and limit=0 returns all items.
Response delay: A delay query parameter can simulate responses from 0 to 5000 milliseconds.
Custom API: Users can create a hosted mock REST API endpoint with their own JSON response body and select GET, POST, PUT, PATCH, or DELETE.
Custom API limits: Custom response endpoints last 90 days and accept JSON response bodies up to 300 KB.
Webhook tool: The webhook inspector captures incoming requests for debugging, supports all HTTP methods, and keeps endpoints live for 24 hours.
Webhook limits: Each webhook stores up to 100 requests, accepts payloads up to 300 KB, and strips authorization, cookie, and x-api-key headers before storage.
TOTP tool: The TOTP tool generates real-time verification codes and supports base32 secrets and otpauth URIs.
Authentication: The auth endpoints demonstrate login, access and refresh tokens, and authenticated resource access.
Mock data behavior: Adding or updating products simulates the request and returns a result without changing the server’s stored data.
Scale: The homepage states that DummyJSON serves over 500 million requests monthly.
Price from: Free

Where it ranks on Freedom251

Best Test Data Generation Tools in 2026#5 of 28

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Sources

dummyjson.com· checked 4 Oct 2026
dummyjson.com/docs· checked 4 Oct 2026
dummyjson.com/custom-response· checked 4 Oct 2026
dummyjson.com/webhook· checked 4 Oct 2026
dummyjson.com/2fa· checked 4 Oct 2026
dummyjson.com/docs/auth· checked 4 Oct 2026
dummyjson.com/docs/products· checked 4 Oct 2026