1 MB OBJ sample file
An OBJ file of exactly 1,048,576 bytes. It is a valid Wavefront OBJ 3D model file, generated for this site and checked with an independent parser.
Download
sample-obj-1mb.obj
1 MB1,048,576 bytes
Download 1 MB OBJDirect download. No sign-up and no waiting.
- Type
- model/obj
- SHA-256
8fa92947aa046afe24ed2aaf2ff7af0cb20517211f187ef5620aaea45ac5cb96- Direct URL
https://sampletestfiles.com/downloads/obj/sample-obj-1mb.obj
What is in this file
A height-field mesh with 17,700 vertices and 34,866 triangular faces, written as "v" and "f" statements with no materials. Comment lines at the end bring the file to the exact size.
| Vertices | 17,700 |
|---|---|
| Faces | 34,866 triangles |
| Objects | 1 (terrain) |
| Normals and UVs | None |
| Encoding | UTF-8 (ASCII characters only) |
How the file begins
The opening lines of sample-obj-1mb.obj, exactly as they appear in the file.
# SampleTestFiles sample OBJ file (1 MB)
# A triangulated height-field surface, 118 vertices wide.
o terrain
v 0.000 0.0000 0.000
v 0.500 0.1197 0.000
v 1.000 0.2377 0.000
v 1.500 0.3523 0.000
v 2.000 0.4618 0.000
v 2.500 0.5646 0.000
v 3.000 0.6594 0.000
v 3.500 0.7446 0.000
v 4.000 0.8192 0.000
v 4.500 0.8820 0.000
v 5.000 0.9320 0.000Preview
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
- Download tests on mobile connections
- Checking mesh importers and converters
- Load-testing viewers with large meshes
Testing notes for OBJ
- OBJ has no unit of measurement, so the same file can appear at wildly different scales in different tools.
- Face indices are one-based and can be negative, meaning relative to the end of the vertex list; importers written for zero-based arrays are off by one.
Technical details
| File name | sample-obj-1mb.obj |
|---|---|
| Format | OBJ (Wavefront OBJ 3D model) |
| Extension | .obj |
| MIME type | model/obj |
| Size | 1,048,576 bytes (1 MB) |
| Kind | Text |
| SHA-256 | 8fa92947aa046afe24ed2aaf2ff7af0cb20517211f187ef5620aaea45ac5cb96 |
| 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-obj-1mb.obj 'https://sampletestfiles.com/downloads/obj/sample-obj-1mb.obj'
sha256sum sample-obj-1mb.obj # Linux
shasum -a 256 sample-obj-1mb.obj # macOSOn Windows, run Get-FileHash sample-obj-1mb.obj -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 OBJ file?
- A height-field mesh with 17,700 vertices and 34,866 triangular faces, written as "v" and "f" statements with no materials. Comment lines at the end bring the file to the exact size.
- What does the sample model look like?
- A gently rolling surface, like a patch of terrain, built from triangles. It has no materials or textures.