100 MB KML sample

A KML file of exactly 104,857,600 bytes. It is a valid Keyhole Markup Language 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 KML file.

sample-kml-100mb.kml

100 MB104,857,600 bytes

Download 100 MB KML

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: application/vnd.google-earth.kml+xml
SHA-256: bb1eb5ebaa85eeccde275b998a612ef270dbc59883457f908f005f54adbbca10
Delivery: Created in your browser from static generator assets (how it works).

What is in this file

A KML 2.2 document with a shared style and 442,154 placemarks, each a named point with a description. An XML comment before the closing tags brings the file to the exact size.

Placemarks	442,154
KML version	2.2
Geometry	Point
Network links	None
Encoding	UTF-8 (ASCII characters only)

How the file begins

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

00000000  3c 3f 78 6d 6c 20 76 65  72 73 69 6f 6e 3d 22 31 |<?xml version="1|
00000010  2e 30 22 20 65 6e 63 6f  64 69 6e 67 3d 22 55 54 |.0" encoding="UT|
00000020  46 2d 38 22 3f 3e 0a 3c  6b 6d 6c 20 78 6d 6c 6e |F-8"?>.<kml xmln|
00000030  73 3d 22 68 74 74 70 3a  2f 2f 77 77 77 2e 6f 70 |s="http://www.op|

Preview

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

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

Finding the first upload limit in a new stack
Testing map imports and layer rendering
Checking conversion between KML, GPX and GeoJSON

Testing notes for KML

KML can pull in remote content through network links and icon URLs. An importer should not fetch them blindly. The samples here refer to nothing outside the file.
Longitude comes first. Reading the pair the other way round moves every point to a different part of the world.

KML format reference

Technical details

File name	sample-kml-100mb.kml
Format	KML (Keyhole Markup Language)
Extension	.kml
MIME type	application/vnd.google-earth.kml+xml
Size	104,857,600 bytes (100 MB)
Kind	Text
SHA-256	bb1eb5ebaa85eeccde275b998a612ef270dbc59883457f908f005f54adbbca10
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	GIS

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

On Windows, run Get-FileHash sample-kml-100mb.kml -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 KML file?: A KML 2.2 document with a shared style and 442,154 placemarks, each a named point with a description. An XML comment before the closing tags brings the file to the exact size.
What do the KML samples contain?: Placemarks near sixteen real cities on six continents: mostly points, with a path and a polygon in every ten, and two shared styles.

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