3 MB JSONL sample
A JSONL file of exactly 3,145,728 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 3 MB sample, test or dummy JSONL file.
Download
sample-jsonl-3mb.jsonl
3 MB3,145,728 bytes
Download 3 MB JSONLCreated 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
e284ed7abb62625528010effe28268ac3b55a630a4837c008772219725c267aa- Delivery
- Created in your browser from static generator assets (how it works).
What is in this file
9,200 JSON objects, one per line, followed by one short object whose "note" string is lengthened to reach the exact size.
| Lines | 9,201 |
|---|---|
| Records per line | 1 |
| Encoding | UTF-8 (ASCII characters only) |
| Line endings | LF |
How the file begins
The opening lines of sample-jsonl-3mb.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
Creates the file in your browser and shows the first 64 KB of it.
Where 3 MB matters
A 3,145,728-byte file, 3 MB in the binary units that operating systems and upload limits use. It is useful wherever a form, an API gateway, a storage quota or a mail server is configured with a limit of about this size.
Use this file for
- Finding the first upload limit in a new stack
- 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.
Technical details
| File name | sample-jsonl-3mb.jsonl |
|---|---|
| Format | JSONL (JSON Lines) |
| Extension | .jsonl |
| MIME type | application/jsonl |
| Size | 3,145,728 bytes (3 MB) |
| Kind | Text |
| SHA-256 | e284ed7abb62625528010effe28268ac3b55a630a4837c008772219725c267aa |
| 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-3mb.jsonl # Linux
shasum -a 256 sample-jsonl-3mb.jsonl # macOSOn Windows, run Get-FileHash sample-jsonl-3mb.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 3 MB?
- Yes. It is 3,145,728 bytes, which is 3 MB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
- What is inside the 3 MB JSONL file?
- 9,200 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.