1 MB glTF sample file
A glTF file of exactly 1,048,576 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 MB sample, test or dummy glTF file.
Download
sample-gltf-1mb.gltf
1 MB1,048,576 bytes
Download 1 MB glTFDirect download. No sign-up and no waiting.
- Type
- model/gltf+json
- SHA-256
7ca0ebec418ff8654cc176114c47f67ae75164566f5c687868362e4abeb59da5- Direct URL
https://www.sampletestfiles.com/downloads/gltf/sample-gltf-1mb.gltf
What is in this file
A single mesh of 32,761 vertices and 64,800 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 | 32,761 |
|---|---|
| Triangles | 64,800 |
| 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-1mb.gltf, exactly as they appear in the file.
Preview
Shows the first 64 KB of the file.
Where 1 MB matters
A 1,048,576-byte file: exactly the default upload limit of nginx, Spring Boot and Next.js. These are the default limits a file of this size is useful for testing:
| System | Limit | Note |
|---|---|---|
| nginx | 1 MB by default (client_max_body_size) | A multipart upload of this file exceeds the limit by the size of the form boundaries. |
| Spring Boot multipart | 1 MB per file by default (max-file-size) | A file of exactly 1 MB is at the limit. |
| Next.js API routes and Server Actions | 1 MB by default | Larger bodies need the size limit raised in configuration. |
| Cloud Firestore documents | 1 MiB (1,048,576 bytes) | The same number of bytes as this file. |
| Apache Kafka messages | About 1 MB by default | Brokers reject larger records unless message.max.bytes is raised. |
Use this file for
- Finding the first upload limit in a new stack
- Testing 3D upload and web preview
- Checking loaders with embedded and external buffers
Testing notes for glTF
- A file can declare extensions it requires, such as Draco mesh compression. A loader without that extension has to refuse the file.
- 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.
Technical details
| File name | sample-gltf-1mb.gltf |
|---|---|
| Format | glTF (GL Transmission Format) |
| Extension | .gltf |
| MIME type | model/gltf+json |
| Size | 1,048,576 bytes (1 MB) |
| Kind | Text |
| SHA-256 | 7ca0ebec418ff8654cc176114c47f67ae75164566f5c687868362e4abeb59da5 |
| 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-1mb.gltf 'https://www.sampletestfiles.com/downloads/gltf/sample-gltf-1mb.gltf'
sha256sum sample-gltf-1mb.gltf # Linux
shasum -a 256 sample-gltf-1mb.gltf # macOSOn Windows, run Get-FileHash sample-gltf-1mb.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 MB?
- Yes. It is 1,048,576 bytes, which is 1 MB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
- What is inside the 1 MB glTF file?
- A single mesh of 32,761 vertices and 64,800 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.