What tokens are supported?

Over 20 token types: {{name}}, {{firstName}}, {{lastName}}, {{email}}, {{phone}}, {{uuid}}, {{int:min-max}}, {{float:min-max-decimals}}, {{boolean}}, {{date}} (ISO timestamp), {{dateOnly}} (YYYY-MM-DD), {{word}}, {{sentence}}, {{url}}, {{ip}}, {{city}}, {{country}}, {{company}}, {{color}}, {{status}}, {{role}}, and {{pick:a,b,c}} for custom value lists.

How is {{int:1-100}} different from {{float:0-100-2}}?

{{int:1-100}} generates a whole integer between 1 and 100. {{float:0-100-2}} generates a decimal number between 0 and 100 with 2 decimal places. The format is {{float:min-max-decimals}}. For example, {{float:0-9.99-2}} gives prices like 4.73.

Can I use {{pick:...}} to generate enum values?

Yes. {{pick:pending,active,cancelled,refunded}} randomly picks one of the comma-separated values each time it runs. This is ideal for status fields, categories, or any field with a fixed set of allowed values.

Can I nest tokens inside objects or arrays?

Yes. Tokens work at any depth in the JSON structure. You can have nested objects like {"address": {"city": "{{city}}", "zip": "{{int:10000-99999}}"}} or arrays like {"tags": ["{{word}}", "{{word}}"]}.

What is this tool useful for?

Mock API data is used to develop and test frontends before the real backend API is ready, to seed databases with realistic test records, to write automated tests with controlled but realistic data, and to demonstrate UIs with populated content instead of placeholder text.

How is this different from the Fake Data Generator?

The Mock API Generator lets you define your own JSON schema using a template — full control over field names and structure. The Fake Data Generator provides pre-built schemas for common entity types (users, products, orders, etc.) for instant results without writing a template.

Free · Browser-only · No sign-up

Mock API Generator

Define a JSON template with {{tokens}} and generate realistic mock data instantly. Use {{name}}, {{email}}, {{int:1-100}}, {{pick:a,b,c}}, and 20+ other token types. Generate up to 50 records and download as JSON.

22+ tokensNested objectsCustom pick listsBulk generateDownload JSON100% offline

records

json template

Token reference

Click a token to append it to the template

Features

22+ token types

Name, email, phone, UUID, int, float, boolean, date, city, color, and more

Custom pick lists

{{pick:draft,published,archived}} generates from your own value set

Nested support

Tokens work at any depth inside nested objects and arrays

Bulk generation

Generate 1, 5, 10, 20, or 50 records at a time

Download JSON

Save the output as a .json file for use in your project

Browser-only

No server — your template and generated data stay on device

How to use

1
Write a template
Define any JSON structure using {{tokens}} for fields you want randomized.
2
Set record count
Choose 1, 5, 10, 20, or 50 records to generate at once.
3
Generate
Click Generate. Each {{token}} is replaced with a unique random value per record.
4
Export
Copy to clipboard or download as .json for use in your app or test suite.

Frequently asked questions

Can I use the output with json-server?

Yes. Save the output as db.json and run npx json-server db.json to instantly get a full REST API with GET, POST, PUT, and DELETE endpoints for your mock data.

What happens if I have an invalid JSON template?

The tool shows a JSON parse error before generating. Fix the template syntax first — the {{tokens}} must be inside a valid JSON string value (wrapped in double quotes).

Can I generate arrays of nested objects?

Yes. Your template can include an array field like "items": [{"name": "{{word}}", "qty": "{{int:1-10}}"}] and each record will generate a new random item.

Is each generated record independent?

Yes. Every record is independently randomized. The same token in two different records will produce different values each time.

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