100 MB GeoJSON sample

A GeoJSON file of exactly 104,857,600 bytes. It is a valid GeoJSON 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 GeoJSON file.

sample-geojson-100mb.geojson

100 MB104,857,600 bytes

Download 100 MB GeoJSON

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/geo+json
SHA-256: ab6077fdd099a0da3f7752b2c99dd42a152cf1a2df5e7e3aa92c81d1aad34e6c
Delivery: Created in your browser from static generator assets (how it works).

What is in this file

A FeatureCollection of 546,684 features: 492,017 points and 54,668 line strings with longitude-latitude coordinates (WGS 84) and properties. A "padding" member, which GeoJSON readers ignore, brings the file to the exact size.

Features	546,684
Geometry types	Point, LineString
Coordinate reference	WGS 84 (RFC 7946)
Encoding	UTF-8 (ASCII characters only)

How the file begins

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

00000000  7b 0a 20 20 22 74 79 70  65 22 3a 20 22 46 65 61 |{.  "type": "Fea|
00000010  74 75 72 65 43 6f 6c 6c  65 63 74 69 6f 6e 22 2c |tureCollection",|
00000020  0a 20 20 22 6e 61 6d 65  22 3a 20 22 53 61 6d 70 |.  "name": "Samp|
00000030  6c 65 20 47 65 6f 4a 53  4f 4e 20 66 69 6c 65 20 |le GeoJSON file |

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
Load-testing map rendering with many features
Testing map layers and spatial queries

Testing notes for GeoJSON

Swapped latitude and longitude put points in the wrong hemisphere or the ocean. Test with locations you can recognise.
Polygon rings must be closed, with the first and last positions identical.

GeoJSON format reference

Technical details

File name	sample-geojson-100mb.geojson
Format	GeoJSON (GeoJSON)
Extension	.geojson
MIME type	application/geo+json
Size	104,857,600 bytes (100 MB)
Kind	Text
SHA-256	ab6077fdd099a0da3f7752b2c99dd42a152cf1a2df5e7e3aa92c81d1aad34e6c
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-geojson-100mb.geojson     # Linux
shasum -a 256 sample-geojson-100mb.geojson # macOS

On Windows, run Get-FileHash sample-geojson-100mb.geojson -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 GeoJSON file?: A FeatureCollection of 546,684 features: 492,017 points and 54,668 line strings with longitude-latitude coordinates (WGS 84) and properties. A "padding" member, which GeoJSON readers ignore, brings the file to the exact size.
Where are the sample features located?: Near sixteen real cities on six continents, with small random offsets, so the result is easy to check on a map.

Download