5 KB JSON sample file

A JSON file of exactly 5,120 bytes. It is a valid JavaScript Object Notation file, generated for this site and checked with an independent parser.

sample-json-5kb.json

5 KB5,120 bytes

Download 5 KB JSON

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Type: application/json
SHA-256: c520fb952f7924cbd260462a75ed652b06d8649f2c2abffd674dc7a983f3a8cf
Direct URL: https://sampletestfiles.com/downloads/json/sample-json-5kb.json

What is in this file

An object with a "records" array of 14 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	14
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-5kb.json, exactly as they appear in the file.

{
  "generator": "SampleTestFiles",
  "description": "Sample JSON file (5 KB) 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 file contents.

Where 5 KB matters

A 5,120-byte file: larger than a cookie, smaller than a typical HTTP header limit. These are the default limits a file of this size is useful for testing:

System	Limit	Note
Browser cookies	4,096 bytes per cookie	5 KB does not fit in one cookie.
Vite asset inlining	4 KB by default (assetsInlineLimit)	A 5 KB asset is emitted as a separate file rather than inlined as base64.
nginx and Apache request headers	8 KB per header line by default	5 KB fits; the 10 KB sample does not.

All 5 KB sample files

Use this file for

Checking asset-inlining thresholds in bundlers
Testing parsers, schema validators and serialisers
Load-testing endpoints with large payloads

Testing notes for JSON

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.
The JSON standard does not say what happens with duplicate keys, so different parsers keep different values.

JSON format reference

Technical details

File name	sample-json-5kb.json
Format	JSON (JavaScript Object Notation)
Extension	.json
MIME type	application/json
Size	5,120 bytes (5 KB)
Kind	Text
SHA-256	c520fb952f7924cbd260462a75ed652b06d8649f2c2abffd674dc7a983f3a8cf
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-5kb.json 'https://sampletestfiles.com/downloads/json/sample-json-5kb.json'
sha256sum sample-json-5kb.json     # Linux
shasum -a 256 sample-json-5kb.json # macOS

On Windows, run Get-FileHash sample-json-5kb.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 5 KB?: Yes. It is 5,120 bytes, which is 5 KB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
What is inside the 5 KB JSON file?: An object with a "records" array of 14 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.

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