Blog
Guides, tips, and updates from the Dummy JSON Generator team.
6 Best Free JSON Schema Generator Tools in 2026
Compare the best free JSON Schema generator and validation tools — Quicktype, JSON Schema Faker, Ajv, and more — plus how they differ from data generators.
July 3, 20267 Best Mockaroo Alternatives in 2026 (Free & Paid)
Looking for a Mockaroo alternative? We compared 7 tools for generating fake JSON, CSV, and SQL test data. Find the best free option for your workflow.
June 18, 20267 Best Random User Generator APIs in 2026 (Free & Paid)
Compare the best random user generator APIs — Dummy JSON Generator, RandomUser.me, Faker.js, Reqres, DiceBear — for seed data, demos, and UI testing.
July 3, 2026Contract Testing with Fake Data: Pact and OpenAPI Mocking Explained
an order with id 101 exists
July 7, 2026How to Convert JSON to Excel (XLSX) with Formulas Intact
Learn how to convert JSON to a working XLSX spreadsheet with SheetJS — including how to add live Excel formulas, not just static values.
July 9, 2026How to Generate Realistic Fake Address and Locale Data for 50+ Countries
Learn how to generate locale-aware fake address data for international testing — postal code formats, address field structure, and Faker.js locales.
July 9, 2026Generating Fake E-commerce Product Data for Shopify and WooCommerce
How to generate and import realistic fake product catalogs for Shopify and WooCommerce, including variants, edge cases, and CSV import formats.
July 9, 2026Generating Fake JSON Data for Charts and Dashboard Prototypes
Learn how to generate realistic fake JSON data for charts and dashboards. Includes Chart.js, Recharts, and D3.js integration examples.
June 5, 2026Using Fake JSON Data in Cypress and Playwright E2E Tests
Learn how to use fake JSON data with cy.intercept() in Cypress and page.route() in Playwright for fast, reliable E2E tests without a real database.
June 11, 2026How to Use Fake JSON Data in Postman Collections
Learn how to use fake JSON data in Postman mock servers, data-driven collection runs with CSV, and Newman CLI for CI/CD API testing.
June 9, 2026Components/UserCard
How to use realistic fake JSON data in Storybook stories — fixtures, edge cases, loading/error states, and mocking API calls with MSW.
July 5, 2026How to Generate Fake JSON Data for Vue 3 and Nuxt Apps
A practical guide to using fake JSON data in Vue 3 and Nuxt apps — composables, SSR-safe server routes, and how to avoid hydration mismatches.
July 4, 2026Generating Fake JSON Fixtures for Jest and Vitest Unit Tests
How to structure fake JSON test fixtures for Jest and Vitest — factory functions, snapshot testing, and avoiding common fixture-related test bugs.
July 6, 2026How to Generate Fake Webhook Payloads for Stripe, GitHub, and Slack
A practical guide to generating and signing fake webhook payloads for Stripe, GitHub, and Slack — including idempotency testing and CLI tools.
July 7, 2026Faker.js vs Dummy JSON Generator: Which Should You Use?
Faker.js vs browser-based JSON generators compared: setup time, flexibility, output formats, and performance. Find out which tool fits your workflow.
June 17, 2026Why You Should Never Use Real User Data in Development (GDPR Guide)
Using real user data in dev environments violates GDPR. Learn the risks, the legal requirements, and how to use synthetic fake data instead.
June 7, 2026How to Generate 1 Million JSON Records for Load Testing
Learn how to generate massive JSON datasets — up to 1 million records — for load testing, database stress testing, and performance benchmarking. Free tool included.
June 15, 2026How to Generate Fake CSV Data for Excel and Google Sheets
Generate realistic fake CSV data for Excel, Google Sheets, Postman, and dashboard prototyping. Step-by-step guide with import instructions.
June 14, 2026How to Generate SQL INSERT Test Data Quickly
Generate SQL INSERT test data fast — using Dummy JSON Generator, generate_series(), stored procedures, or Node.js scripts. Works with PostgreSQL, MySQL, SQLite.
June 10, 2026How to Generate Fake JSON Data for API Testing
Learn how to generate realistic fake JSON test data for API testing, Postman collections, and mock servers. Step-by-step guide with examples.
June 20, 2026JSON Array vs JSON Object: Structuring Nested Test Data Correctly
Learn when to use a JSON array vs a keyed JSON object, and how to nest test data correctly to avoid fragile parallel-array bugs.
July 9, 2026JSON Formatting and Validation: Common Errors and How to Fix Them
Fix common JSON syntax errors — trailing commas, unquoted keys, unescaped strings. Learn how to validate JSON with Zod, JSON Schema, and Python.
June 4, 2026How to Seed a Database with JSON Data (PostgreSQL, MySQL, MongoDB)
Learn how to seed PostgreSQL, MySQL, and MongoDB with realistic fake data using CSV and JSON. Includes Prisma seed, mongoimport, and COPY commands.
June 19, 2026json-server vs Mockaroo vs Dummy JSON Generator: Which Wins?
A practical comparison of json-server, Mockaroo, and Dummy JSON Generator for building mock APIs and test data — with the fastest workflow to combine them.
July 2, 2026How to Use JSON Test Data in React and Next.js
Learn how to use JSON test data in React and Next.js with local imports, API routes, MSW mock service worker, Vitest, and Storybook stories.
June 16, 2026JSON to TypeScript: Generating Types from Fake Data Automatically
Learn how to generate TypeScript interfaces from JSON automatically with Quicktype — including handling optional fields and keeping types in sync with real data.
July 5, 2026JSON vs YAML vs XML: When to Use Each Format (With Examples)
A practical comparison of JSON, YAML, and XML — real trade-offs, side-by-side examples, and which format fits APIs, configs, and legacy integrations.
July 8, 20268 Best JSONPlaceholder Alternatives in 2026
Outgrown JSONPlaceholder? Compare 8 alternatives — Dummy JSON Generator, json-server, MockAPI, Beeceptor, MSW and more — for custom-schema fake REST APIs.
July 2, 2026How to Generate Mock Data for Swagger and OpenAPI Specs
Generate realistic mock data for Swagger UI and OpenAPI specs. Covers Prism mock server, json-server, Postman mock, and inline OpenAPI examples.
June 13, 2026How to Mock GraphQL APIs with Fake JSON Data (Apollo & urql)
Learn how to mock GraphQL APIs using fake JSON data — Apollo MockedProvider, MSW GraphQL handlers, pagination, and correctly shaped GraphQL errors.
July 6, 2026Mocking API Responses with MSW (Mock Service Worker) in React & Vue
Learn how to mock API responses with MSW in React or Vue — shared handlers for dev, Storybook, and Jest/Vitest tests, including error-state testing.
July 4, 2026How to Pretty-Print, Minify, and Validate JSON Online (and in Code)
Learn the difference between pretty-printing, minifying, and validating JSON — with code examples in JavaScript, jq, and Ajv for each operation.
July 8, 2026Seeding Firebase Firestore and Supabase with Fake JSON Data
A practical guide to seeding Firebase Firestore and Supabase with fake JSON data — Admin SDK batched writes, SQL inserts, RLS gotchas, and cleanup.
July 9, 2026Seeding Laravel and Django with Fake JSON Data
Learn how to seed Laravel (Eloquent, Factories) and Django (fixtures, management commands) with realistic fake JSON data. Includes bulk insert performance tips.
June 6, 2026UUID Generator: What is a UUID and When to Use One?
UUID v4 vs v7, UUID vs auto-increment, storing UUIDs in PostgreSQL/MySQL/SQLite, and how to generate bulk UUIDs for test data.
June 8, 2026What is Dummy Data? Mock Data, Fake Data, Test Data Explained
Dummy data, mock data, fake data, test data, seed data — what do these terms actually mean? Clear definitions with code examples for developers.
June 12, 2026What Is Synthetic Data? AI Training Data vs Test Data Explained
Understand the real difference between synthetic data and fake/dummy test data, and which one your project actually needs — software testing vs ML training.
July 9, 2026