100 MB LOG sample

A LOG file of exactly 104,857,600 bytes. It is a valid Log file file, generated by this site. Compare its checksum and test it with the parser used by your application. Use it wherever you need a 100 MB sample, test or dummy LOG file.

sample-log-100mb.log

100 MB104,857,600 bytes

Download 100 MB LOG

Created in your browser and, in browsers that can stream to disk, sent straight to your downloads list; this can take a minute. No sign-up.

Type: text/plain
SHA-256: b2fb582a79bf7db01bf9320faf2e5845a61c88cf88c2ee7ecaa8bc5cbb01fad6
Delivery: Created in your browser from static generator assets (how it works).

What is in this file

614,305 web-server access log lines in Combined Log Format with increasing timestamps. One final request line carries a lengthened query string so the file reaches the exact size.

Lines	614,306
Format	Combined Log Format (Apache and nginx access logs)
IP addresses	Documentation ranges from RFC 5737
Encoding	UTF-8 (ASCII characters only)

How the file begins

The opening lines of sample-log-100mb.log, exactly as they appear in the file.

00000000  31 39 38 2e 35 31 2e 31  30 30 2e 33 20 2d 20 2d |198.51.100.3 - -|
00000010  20 5b 30 31 2f 4a 61 6e  2f 32 30 32 36 3a 30 30 | [01/Jan/2026:00|
00000020  3a 30 30 3a 30 30 20 2b  30 30 30 30 5d 20 22 47 |:00:00 +0000] "G|
00000030  45 54 20 2f 61 73 73 65  74 73 2f 61 70 70 2e 6a |ET /assets/app.j|

Preview

Creates the file in your browser and shows its first 64 KB.

Where 100 MB matters

A 104,857,600-byte file: the request-body limit of Cloudflare's Free and Pro plans, and the size above which GitHub rejects a file outright.

All 100 MB sample files

Use this file for

Measuring download speed from your own server or CDN
Benchmarking ingestion pipelines
Testing log parsers and grok patterns

Testing notes for LOG

Timestamps carry a zone offset. Parsers that drop it shift every event.
Request paths and user agents come from clients and may contain quotes or escape sequences; a pattern that assumes clean input will misparse real traffic.

LOG format reference

Technical details

File name	sample-log-100mb.log
Format	LOG (Log file)
Extension	.log
MIME type	text/plain
Size	104,857,600 bytes (100 MB)
Kind	Text
SHA-256	b2fb582a79bf7db01bf9320faf2e5845a61c88cf88c2ee7ecaa8bc5cbb01fad6
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	Testing

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-log-100mb.log     # Linux
shasum -a 256 sample-log-100mb.log # macOS

On Windows, run Get-FileHash sample-log-100mb.log -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 100 MB?: Yes. It is 104,857,600 bytes, which is 100 MB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
What is inside the 100 MB LOG file?: 614,305 web-server access log lines in Combined Log Format with increasing timestamps. One final request line carries a lengthened query string so the file reaches the exact size.
Are the IP addresses real?: No. They come from the address ranges that RFC 5737 reserves for documentation, so they belong to no one.

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