1 KB glTF sample file

A glTF file of exactly 1,024 bytes. It is a valid GL Transmission Format file, generated for this site and checked with an independent parser. Use it wherever you need a 1 KB sample, test or dummy glTF file.

sample-gltf-1kb.gltf

1 KB1,024 bytes

Download 1 KB glTF

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Type: model/gltf+json
SHA-256: 5112bd4367abb7ca21407d0f6951ca01ff1c64a9bde74c80d8407ca1ff5f24f0
Direct URL: https://www.sampletestfiles.com/downloads/gltf/sample-gltf-1kb.gltf

What is in this file

A single mesh of 9 vertices and 8 triangles, with its vertex and index data embedded in the JSON as a base64 data URI, so the file needs no companion .bin. A "padding" string under the standard "extras" property brings the file to the exact size.

Vertices	9
Triangles	8
Meshes	1 (terrain)
Buffers	1, embedded as a base64 data URI
Materials and textures	None
Version	glTF 2.0

How the file begins

The opening lines of sample-gltf-1kb.gltf, exactly as they appear in the file.

Preview

Shows the file contents.

Where 1 KB matters

The smallest practical test file: 1,024 bytes, small enough to travel in a single network packet. These are the default limits a file of this size is useful for testing:

System	Limit	Note
Ethernet	1,500 bytes (typical MTU)	A 1 KB payload fits in one packet with its headers.
Browser cookies	4,096 bytes per cookie	1 KB is well inside the limit; the 5 KB sample is over it.

All 1 KB sample files

Use this file for

Smoke tests in CI that must run in milliseconds
Testing 3D upload and web preview
Checking loaders with embedded and external buffers

Testing notes for glTF

A .gltf file often refers to separate .bin and texture files. Uploading the JSON alone gives a model with no geometry. The samples here embed their data, so one file is enough.
glTF is Y-up and in metres, while STL and many CAD exports are Z-up and in millimetres. A converter that skips the adjustment yields a model lying on its side and a thousand times too large.

glTF format reference

Technical details

File name	sample-gltf-1kb.gltf
Format	glTF (GL Transmission Format)
Extension	.gltf
MIME type	model/gltf+json
Size	1,024 bytes (1 KB)
Kind	Text
SHA-256	5112bd4367abb7ca21407d0f6951ca01ff1c64a9bde74c80d8407ca1ff5f24f0
Created	2026-10-10
Validation	Exact size, signature bytes and structure checked when the file was generated
Preview	Available on this page
Source	Generated for this site; not copied from elsewhere
Licence	Free to use, modify and redistribute (terms)
Category	3D Models

Validated for expected format and integrity. As with any download, scan the file with your own security tools before opening it. How files are made and checked

Download from the command line and verify

Fetch the file with curl, then compare its checksum with the SHA-256 value above.

curl -o sample-gltf-1kb.gltf 'https://www.sampletestfiles.com/downloads/gltf/sample-gltf-1kb.gltf'
sha256sum sample-gltf-1kb.gltf     # Linux
shasum -a 256 sample-gltf-1kb.gltf # macOS

On Windows, run Get-FileHash sample-gltf-1kb.gltf -Algorithm SHA256 in PowerShell. A matching value proves that the download is complete and unaltered.

Related files

Questions about this file

Is this file exactly 1 KB?: Yes. It is 1,024 bytes, which is 1 KB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
What is inside the 1 KB glTF file?: A single mesh of 9 vertices and 8 triangles, with its vertex and index data embedded in the JSON as a base64 data URI, so the file needs no companion .bin. A "padding" string under the standard "extras" property brings the file to the exact size.
Do the glTF samples need a separate .bin file?: No. The vertex and index data are embedded in the JSON as a base64 data URI, so each sample is a single self-contained file.

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