.JSON

Sample JSON Files

Realistic JSON for mocking APIs, seeding databases and testing parsers. Every dataset is internally consistent, so related fields make sense together.

.jsonapplication/json9 filesFree · No sign-upUnlimited downloads

Custom size by Technology Channel · Free to use for testing and development, including commercial projects.

Simple objectPopular

sample.json

A small, valid JSON object with strings, numbers, booleans, null, an array and a nested object.

Object
11 keys
643 B

643 B Download

100 users

sample-users-100.json

Array of 100 realistic user records with nested company and address objects.

100 records
Array of objects
85.1 KB

85.1 KB Download

1,000 users

sample-users-1000.json

The same user shape at 1,000 records. Good for tables, pagination and search tests.

1,000 records
Array of objects
852 KB

852 KB Download

10,000 products (large)

sample-products-10000.json

Large product catalog for parser speed, streaming and memory tests.

10,000 records
Object with array
5.1 MB

5.1 MB Download

Deeply nested (15 levels)

sample-nested.json

15 levels of nesting with mixed types, nulls and scientific notation. Tests recursion limits and tree views.

15 levels
Mixed types
7.2 KB

7.2 KB Download

REST API response

sample-api-response.json

Paginated API response with data, pagination, links and an errors array. Use it to mock endpoints.

Paginated
10 items
3.7 KB

3.7 KB Download

Unicode and emoji

sample-unicode.json

Many scripts (Nepali, CJK, Arabic, Hebrew), emoji, escapes, combining marks and zero-width spaces.

UTF-8
RTL + CJK
Emoji

1.3 KB Download

Invalid JSON (error test)

sample-invalid.json

Deliberately broken: single quotes, a comment, trailing comma, leading zero, True, a missing value and an unclosed brace.

Malformed
Error handling
221 B

221 B Download

JSON Lines (1,000 events)

sample.jsonl

Newline-delimited JSON: one event object per line. Common for logs, streaming and ML datasets.

1,000 lines
NDJSON / JSONL
117 KB

117 KB Download

Exact-size generator

Need a JSON of a different size?

Create a valid JSON file of any exact size, byte for byte, right in your browser. Nothing is uploaded, and you can generate as many as you like.

Perfect for upload limits: 9.99 MB, 10 MB and 10.01 MB in seconds.
Up to 20 copies at once, bundled in one ZIP.
Unique copies get different checksums, for duplicate-detection tests.

Use cases

What you can test

API mocks and front-end prototypes.
Parser speed and memory with 10,000 products.
Deeply nested structures and recursion limits.
Pagination logic with the API response file.
Error handling with the invalid JSON file.
Unicode, emoji and string escaping.
Line-by-line streaming with JSON Lines.

Reference

JSON format facts

Extension	.json
MIME type	application/json
File signature	None (plain text, usually starts with { or [)
Origin	Douglas Crockford, 2001 · RFC 8259, ECMA-404
Files here	9 · 6.1 MB in total
License	Free for any use, no attribution

About the format

What is a JSON file?

JSON (JavaScript Object Notation) was popularized by Douglas Crockford in the early 2000s and is standardized as RFC 8259 and ECMA-404. It is the default data format for web APIs.

JSON has only six value types: object, array, string, number, boolean and null. There are no comments, no trailing commas and no dates, which is where many real-world parsing bugs begin.

Developers

Load with fetch

const res = await fetch("files/json/sample-users-100.json");
const data = await res.json();
console.log(data);

Download with cURL

curl -O https://samplefiles.technologychannel.org/files/json/sample.json

FAQ

JSON files: common questions

Is the data real?

No. Names, emails, addresses and products are fictional and generated for testing. Email addresses use reserved example domains, so nothing can reach a real inbox.

What is wrong with the invalid JSON file?

It contains common mistakes such as a trailing comma, single quotes and an unquoted key. A strict parser should reject it with a clear error.

Can I use these JSON files in commercial projects?

Yes. Every JSON file here is free for any use, including commercial testing, demos and tutorials. No attribution is required.

Can I download the same JSON file more than once?

Yes, as many times as you like. There is no sign-up, no daily limit and no waiting timer. Direct links also work in scripts, CI jobs and automated tests.

Can I call these files like an API?

Yes. Request any file by its direct URL with fetch, cURL or your HTTP client. Responses are served as application/json.

Keep testing

Related formats

All 20 formats

All JSON sample files