1 KB JSONL sample file

A JSONL file of exactly 1,024 bytes. It is a valid JSON Lines file, generated for this site and checked with an independent parser.

sample-jsonl-1kb.jsonl

1 KB1,024 bytes

Download 1 KB JSONL

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Type: application/jsonl
SHA-256: 3c9bf62d89954dde3f734db3b33c2e2926ebcef98df13bb355dd10ab10f35929
Direct URL: https://sampletestfiles.com/downloads/jsonl/sample-jsonl-1kb.jsonl

What is in this file

2 JSON objects, one per line, followed by one short object whose "note" string is lengthened to reach the exact size.

Lines	3
Records per line	1
Encoding	UTF-8 (ASCII characters only)
Line endings	LF

How the file begins

The opening lines of sample-jsonl-1kb.jsonl, exactly as they appear in the file.

{"id":1,"uuid":"a6cf3b6b-cd57-4173-a942-a2339c75f449","name":{"first":"Ethan","last":"Zeller"},"email":"ethan.zeller1@example.com","active":true,"bala…
{"id":2,"uuid":"e86fd25c-cc5a-44ae-a8ee-4439d8d6c68e","name":{"first":"Elena","last":"Underhill"},"email":"elena.underhill2@example.net","active":true…

Preview

Shows the file contents.

Where 1 KB matters

The smallest practical test file: 1,024 bytes, small enough to travel in a single network packet. These are the default limits a file of this size is useful for testing:

System	Limit	Note
Ethernet	1,500 bytes (typical MTU)	A 1 KB payload fits in one packet with its headers.
Browser cookies	4,096 bytes per cookie	1 KB is well inside the limit; the 5 KB sample is over it.

All 1 KB sample files

Use this file for

Smoke tests in CI that must run in milliseconds
Testing streaming parsers
Loading datasets for machine-learning experiments

Testing notes for JSONL

Passing the whole file to a standard JSON parser fails, because the file as a whole is not one JSON value.
A blank line or a trailing comma on any line breaks strict readers, so decide how your importer treats them.

JSONL format reference

Technical details

File name	sample-jsonl-1kb.jsonl
Format	JSONL (JSON Lines)
Extension	.jsonl
MIME type	application/jsonl
Size	1,024 bytes (1 KB)
Kind	Text
SHA-256	3c9bf62d89954dde3f734db3b33c2e2926ebcef98df13bb355dd10ab10f35929
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-jsonl-1kb.jsonl 'https://sampletestfiles.com/downloads/jsonl/sample-jsonl-1kb.jsonl'
sha256sum sample-jsonl-1kb.jsonl     # Linux
shasum -a 256 sample-jsonl-1kb.jsonl # macOS

On Windows, run Get-FileHash sample-jsonl-1kb.jsonl -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 1 KB?: Yes. It is 1,024 bytes, which is 1 KB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
What is inside the 1 KB JSONL file?: 2 JSON objects, one per line, followed by one short object whose "note" string is lengthened to reach the exact size.
How is JSONL different from JSON?: A JSON file is one value, usually an array. A JSONL file is many values separated by line breaks, which can be appended to and read as a stream.

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