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Mockaroo
What it is
Mockaroo generates realistic test data for developers and testers, and can create mock back-end APIs for UI work before a back end is ready. Its data generator offers more than 100 built-in data types; users can also upload reference data or create types with the formula API. Output formats include JSON, CSV, tab-separated or custom-delimited text, SQL, and XML. Mock APIs can map request parameters to schemas and return dynamic or static data, or simulate errors. Both APIs require an API key, supplied as a query parameter or an X-API-Key header. The free plan includes 1,000 rows per file and 200 API requests per day. Silver costs $60.00 per year, and Gold costs $500.00 per year. Synchronous API responses are limited to 5,000 records on any plan, while background generation requires a paid plan. Enterprise costs $7500.00 per year and is distributed as a Docker image for private cloud or datacenter use.
For and against
For
- More than 100 built-in data types
- Supports JSON, CSV, SQL, and XML output
- Can simulate API errors or return static data
- Enterprise supports private cloud or datacenter deployment
Against
- Free plan allows 200 API requests per day
- Synchronous API responses stop at 5,000 records
- Background generation requires a paid plan
The verdict
Mockaroo combines synthetic data generation with API mocking and multiple output formats. Check the per-file and API limits against your workload, especially if you need synchronous responses above 5,000 records.
Who it suits
Mockaroo suits developers and testers who need realistic test data, including front-end developers building before a back end is ready. It also fits teams that need generated API responses for UI development.
Plans and prices
Free
1,000 rows/file · unlimited browser downloads · 200 API requests/day · 1x speed
Read 2 Oct 2026 · mockaroo.com
Silver
100,000 rows/file · unlimited browser downloads · 1M API records/day · 8x speed
Read 2 Oct 2026 · mockaroo.com
Gold
10M rows/file · unlimited browser downloads · 10M API records/day · 8x speed
Read 2 Oct 2026 · mockaroo.com
Enterprise
Unlimited data and users · private cloud or datacenter · Docker image · unlimited API calls
Read 2 Oct 2026 · mockaroo.com
On the record
- API authentication
- Both Mockaroo APIs require an API key passed as a query parameter or an X-API-Key request header.mockaroo.com · read 2 Oct 2026
- API limits
- The documentation lists daily API limits of 200 requests for Free, 1 million records for Silver, and 10 million records for Gold.mockaroo.com · read 2 Oct 2026
- API mocking
- Mock APIs can map request parameters to schemas, generate dynamic data, simulate errors, or return static data.mockaroo.com · read 2 Oct 2026
- Data types
- The Mock APIs page says users can choose from more than 100 built-in data types, upload reference data, or build data types with the formula API.mockaroo.com · read 2 Oct 2026
- Deployment
- Mockaroo Enterprise is distributed as a Docker image for deployment in a private cloud or datacenter.mockaroo.com · read 2 Oct 2026
- Integrations
- The API documentation identifies an officially supported Node.js client and lists C# client libraries mockaroo.api and NMockaroo.mockaroo.com · read 2 Oct 2026
- Intended users
- Mockaroo describes its use for developers and testers who need realistic test data, and for front-end developers working before a back end is ready.mockaroo.com · read 2 Oct 2026
- Notable limit
- The Generate API documentation says synchronous responses are limited to 5,000 records regardless of plan; background generation requires a paid plan.mockaroo.com · read 2 Oct 2026
- Output formats
- The Generate API supports JSON, CSV, tab-separated text, custom-delimited text, SQL, and XML output.mockaroo.com · read 2 Oct 2026
- Purpose
- Mockaroo generates realistic test data and can create mock back-end APIs for UI development.mockaroo.com · read 2 Oct 2026
- Security
- Mockaroo's privacy policy says sensitive information submitted through the site is encrypted in transit and that access to personal information is limited to employees who need it for their jobs.mockaroo.com · read 2 Oct 2026
- Support
- Mockaroo directs users with questions to its Community Forum so answers can benefit everyone.mockaroo.com · read 2 Oct 2026
