Download JSON Test Pack
A complete JSON testing toolkit in one download. Includes valid JSON files from 1KB to 10MB for performance testing, plus intentionally broken JSON files with common errors (trailing commas, single quotes, missing braces). Perfect for testing JSON validators, API endpoints, and parser error handling.
Why This Bundle?
JSON is the most common data exchange format in web development. This pack gives you everything you need to test both the happy path (valid JSON at various sizes) and error paths (common JSON mistakes). Save time by downloading one pack instead of creating test fixtures manually.
Files Included
| File | Format | Size | |
|---|---|---|---|
| valid-1kb.json | JSON | 1KB | View → |
| valid-10kb.json | JSON | 10KB | View → |
| valid-100kb.json | JSON | 100KB | View → |
| valid-1mb.json | JSON | 1MB | View → |
| valid-10mb.json | JSON | 10MB | View → |
| api-response.json | JSON | 5KB | View → |
| invalid-trailing-comma.json | JSON | 1KB | View → |
| invalid-missing-brace.json | JSON | 1KB | View → |
| invalid-mixed-errors.json | JSON | 1KB | View → |
Use Cases
- Testing JSON.parse() performance across sizes
- Testing JSON validator error reporting
- Verifying API endpoint error handling for malformed JSON
- Building regression test suites for JSON processing
- Testing streaming JSON parsers with large files
Frequently Asked Questions
What sizes are the valid JSON files?
1KB, 10KB, 100KB, 1MB, and 10MB — a complete size ladder for testing parser performance at different scales.
What errors do the invalid files contain?
Trailing commas, single quotes, missing braces, comments, NaN values, and hex notation — the most common real-world JSON errors.