Data FormatExtension: .jsonMIME: application/json
Download Sample JavaScript Object Notation (JSON) Files
JSON is the universal data interchange format for modern APIs. Our dummy JSON files contain 100% syntactically valid datasets documenting frontier reasoning models, evaluation benchmarks (MATH-500, HumanEval), and token pricing, sized up to 10MB for API performance and serialization benchmarking.
Standardized File Headers
5 Size Variants Available
Magic Bytes: 7B (ASCII '{')
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All Available Sizes for JavaScript Object Notation (JSON)
Compare sizes, check precise byte counts, copy links, or download directly.
| File & Size | Exact Bytes | Action |
|---|---|---|
| 50 KB(sample-50kb.json) 50 KB | 51,200 B | |
| 200 KB(sample-200kb.json) 200 KB | 204,800 B | |
| 1 MB(sample-1mb.json) 1 MB | 1,048,576 B | |
| 5 MB(sample-5mb.json) 5 MB | 5,242,880 B | |
| 10 MB(sample-10mb.json) 10 MB | 10,485,760 B |
All JavaScript Object Notation (JSON) Sample Files
Choose a file size to download directly or view technical specifications and CLI commands.
Common Testing Scenarios for JavaScript Object Notation (JSON)
QA engineers and software developers use our .json dummy files for the following test cases:
REST API request/response payload payload size limits
Evaluating `JSON.parse` memory overhead on large objects (5MB+)
Document database ingestion (MongoDB, DynamoDB)
Front-end virtualized list rendering with thousands of items
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