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Mock Data Generator (Faker.js)

Generate fake data with Faker.js — names, emails, phones, addresses, products. 10 locales (Vietnamese, Indonesian, Japanese, Korean…). JSON / CSV / SQL INSERT output.

All tools Browser-only

Schema presets

Row count

Locale

Format

Schema fields

Output

Generate fake data with @faker-js/faker. Supports vi/en/id locales (Vietnamese, Indonesian, US names…). Great for testing APIs, seeding DBs, mocking UIs.

When you need mock data

API testing: generate 1000 fake users to stress-test POST /users.
Seed databases: dev environment needs data — generate SQL INSERT scripts to run once.
UI mockups: backend not ready — fake data lets you demo to stakeholders.
Frontend demos: Storybook components need realistic data to show edge cases (long names, unusual emails).
Privacy compliance: replace real data with fakes to share datasets with contractors or open-source.

Localization

Faker supports 60+ locales. This tool exposes 10 popular ones:

Vietnamese (vi): real Vietnamese surnames (Nguyễn, Trần, Lê), Hanoi/HCMC addresses.
Bahasa Indonesia (id_ID): Indonesian names, Jakarta addresses.
日本語 (ja): Japanese names + addresses.
한국어 (ko): Korean names.
简体中文 (zh_CN): Chinese names.
ภาษาไทย (th): Thai names.
+ EN/FR/DE/ES.

30+ field types

Supports: name/firstName/lastName/email/phone/avatar/company/jobTitle, address (street/city/country/zip/lat/lng), product (name/desc/price/sku), text (word/sentence/paragraph), UUID, dates, credit card, IBAN, IPv4, user agent, color, image URL…

Output formats

JSON: API mocks, frontend fixtures.
CSV: import to Excel, Google Sheets.
TSV: import to database tools.
SQL INSERT: run directly in PostgreSQL/MySQL to seed.

Who this is for

Fullstack/backend/devops engineers — debug JWT, format JSON/SQL, parse cURL, compute CIDR subnets, draft Mermaid diagrams, write conventional commits… Daily toolkit alongside your terminal and editor.

FAQ

Is my pasted code/token sent anywhere?

No. All TopDev dev tools run 100% client-side — JWT, SQL, JSON, cURL, regex… process in-browser. Disconnect to verify. Safe for internal tokens, production DB queries, API keys.

Does it work offline / install as a PWA?

Tools work offline after the first load. Installable PWA is on the roadmap — for now you can bookmark and use without internet.

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