10 MB JSON sample file
A JSON file of exactly 10,485,760 bytes. It is a valid JavaScript Object Notation file, generated for this site and checked with an independent parser.
Download
sample-json-10mb.json
10 MB10,485,760 bytes
Download 10 MB JSONDirect download. No sign-up and no waiting.
- Type
- application/json
- SHA-256
8fdf502af7cb214ca8e1798c34c8f56d077ce3cc444c7a10c746e47479bf98d7- Direct URL
https://sampletestfiles.com/downloads/json/sample-json-10mb.json
What is in this file
An object with a "records" array of 30,143 fictional customer objects, each with nested objects, an array and a nullable field. A final "padding" string brings the file to the exact size.
| Records | 30,143 |
|---|---|
| Root type | Object |
| Value types used | string, number, boolean, null, array, object |
| Encoding | UTF-8 (ASCII characters only) |
| Indentation | 2 spaces, one record per line |
How the file begins
The opening lines of sample-json-10mb.json, exactly as they appear in the file.
{
"generator": "SampleTestFiles",
"description": "Sample JSON file (10 MB) for testing",
"records": [
{"id":1,"uuid":"a6cf3b6b-cd57-4173-a942-a2339c75f449","name":{"first":"Ethan","last":"Zeller"},"email":"ethan.zeller1@example.com","active":true,"…
{"id":2,"uuid":"e86fd25c-cc5a-44ae-a8ee-4439d8d6c68e","name":{"first":"Elena","last":"Underhill"},"email":"elena.underhill2@example.net","active":…Preview
Shows the first 64 KB of the file.
Where 10 MB matters
A 10,485,760-byte file: over the default limits of PHP, API Gateway and Spring Boot requests. These are the default limits a file of this size is useful for testing:
| System | Limit | Note |
|---|---|---|
| Amazon API Gateway | 10 MB payload | A 10 MB file in a multipart or base64 body is over the limit. |
| Spring Boot multipart | 10 MB per request by default (max-request-size) | Exceeded once form overhead is added. |
| PHP | 8 MB POST body by default (post_max_size) | Rejected before the script runs. |
| Amazon S3 multipart upload | 5 MiB minimum part size | This file splits into exactly two minimum-sized parts. |
| Email attachments | Commonly 20 to 25 MB per message | 10 MB fits, at about 13.3 MB once encoded. |
Use this file for
- Exercising chunked and resumable uploads
- Testing parsers, schema validators and serialisers
- Load-testing endpoints with large payloads
Testing notes for JSON
- Most parsers read numbers as 64-bit floats, so integers above 2^53 silently lose precision. Send large identifiers as strings.
- Parsing a large document with a DOM-style parser needs several times its size in memory. Use a streaming parser or JSON Lines for big data.
Technical details
| File name | sample-json-10mb.json |
|---|---|
| Format | JSON (JavaScript Object Notation) |
| Extension | .json |
| MIME type | application/json |
| Size | 10,485,760 bytes (10 MB) |
| Kind | Text |
| SHA-256 | 8fdf502af7cb214ca8e1798c34c8f56d077ce3cc444c7a10c746e47479bf98d7 |
| Created | 2026-10-10 |
| Validation | Exact size, signature bytes and structure checked when the file was generated |
| Preview | Available on this page |
| Source | Generated for this site; not copied from elsewhere |
| Licence | Free to use, modify and redistribute (terms) |
| Category | Data |
Validated for expected format and integrity. As with any download, scan the file with your own security tools before opening it. How files are made and checked
Download from the command line and verify
Fetch the file with curl, then compare its checksum with the SHA-256 value above.
curl -o sample-json-10mb.json 'https://sampletestfiles.com/downloads/json/sample-json-10mb.json'
sha256sum sample-json-10mb.json # Linux
shasum -a 256 sample-json-10mb.json # macOSOn Windows, run Get-FileHash sample-json-10mb.json -Algorithm SHA256 in PowerShell. A matching value proves that the download is complete and unaltered.
Related files
Questions about this file
- Is this file exactly 10 MB?
- Yes. It is 10,485,760 bytes, which is 10 MB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
- What is inside the 10 MB JSON file?
- An object with a "records" array of 30,143 fictional customer objects, each with nested objects, an array and a nullable field. A final "padding" string brings the file to the exact size.
- Why is there a "padding" field?
- JSON has no comments, so a final string member is used to bring each sized file to its exact byte count.