50 KB JSONL sample

A JSONL file of exactly 51,200 bytes. It is a valid JSON Lines file, generated by this site. Compare its checksum and test it with the parser used by your application. Use it wherever you need a 50 KB sample, test or dummy JSONL file.

sample-jsonl-50kb.jsonl

50 KB51,200 bytes

Download 50 KB JSONL

Created in your browser in a few seconds, then checked against the SHA-256 checksum. The file is not uploaded anywhere. No sign-up.

Type: application/jsonl
SHA-256: e2fce56bff328c3c6cca0142fdb60c9c1249c1af677ce91350d77749b535c753
Delivery: Created in your browser from static generator assets (how it works).

What is in this file

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

Lines	150
Records per line	1
Encoding	UTF-8 (ASCII characters only)
Line endings	LF

How the file begins

The opening lines of sample-jsonl-50kb.jsonl, exactly as they appear in the file.

00000000  7b 22 69 64 22 3a 31 2c  22 75 75 69 64 22 3a 22 |{"id":1,"uuid":"|
00000010  34 37 66 36 36 36 33 30  2d 39 63 65 33 2d 34 31 |47f66630-9ce3-41|
00000020  66 30 2d 62 38 38 32 2d  39 66 35 63 36 64 30 31 |f0-b882-9f5c6d01|
00000030  30 37 37 30 22 2c 22 6e  61 6d 65 22 3a 7b 22 66 |0770","name":{"f|

Preview

Shows the file contents.

Where 50 KB matters

A 51,200-byte file, half of the default body limit in several web frameworks. These are the default limits a file of this size is useful for testing:

System	Limit	Note
Express body parsers	100 KB by default	50 KB is accepted; 500 KB is rejected with 413 unless the limit is raised.
Base64 encoding	Adds 33 percent	50 KB becomes about 67 KB when embedded in JSON.

All 50 KB sample files

Use this file for

Checking thumbnail and icon handling
Testing bulk import endpoints
Checking log processors

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-50kb.jsonl
Format	JSONL (JSON Lines)
Extension	.jsonl
MIME type	application/jsonl
Size	51,200 bytes (50 KB)
Kind	Text
SHA-256	e2fce56bff328c3c6cca0142fdb60c9c1249c1af677ce91350d77749b535c753
Created	2026-10-23
Validation	See the listed size and SHA-256. Small downloads are checked in the browser; verify streamed downloads manually. A hash match does not prove parser compatibility.
Preview	Available on this page
Source	Generated in your browser by this site's generator; not copied from elsewhere
Licence	Free to use, modify and redistribute (terms)
Category	Data

Check the stated structure and checksum against your application requirements. As with any download, scan the file with your own security tools before opening it. How files are made and checked

Verify your copy

This file is created in your browser, so it has no direct URL for curl or wget. The generator is designed to produce reproducible bytes. After saving, compare the checksum with the SHA-256 value above.

sha256sum sample-jsonl-50kb.jsonl     # Linux
shasum -a 256 sample-jsonl-50kb.jsonl # macOS

On Windows, run Get-FileHash sample-jsonl-50kb.jsonl -Algorithm SHA256 in PowerShell. For scripts and pipelines, save the file once and keep your own copy.

Related files

Questions about this file

Is this file exactly 50 KB?: Yes. It is 51,200 bytes, which is 50 KB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
What is inside the 50 KB JSONL file?: 149 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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