Repair your OBJ Online

Do you have a OBJ 3D model file that will not open correctly? If so, our free-to-use OBJ 3D model repair tool may be able to help. Our tool analyses the content of your OBJ file and is able to determine if the file structure and content (i.e., vertices, faces, and materials) are valid. Our tool will let you know what is wrong with your OBJ 3D model file and attempt to fix it.

Or drag and drop your files here to upload.
A maximum of 20 files can be uploaded at once.

Please note: Your OBJ, once uploaded to our server, will be deleted 15 minutes after upload.
If our tool offers the option to repair your file, please ensure you download the repaired file within this time period.

How to Repair your OBJ Online?

Here are 3 simple steps to repair your OBJ using our fast and free repair tool.

Upload your OBJ

Click the "Select File" button, then select a OBJ file. The maximum file size is 100MB.

Analysis and Repair

Your OBJ file will be analysed, and our tool will attempt to repair your OBJ file if possible.

Repair or Convert your OBJ

Select an option to either repair or convert to receive your repaired OBJ file.

Frequently Asked Questions

Will the quality (vertices or faces) be affected?

Our OBJ repair tool will not intentionally reduce the number of vertices or faces in your 3D model.

Is it free to use the OBJ file repair tool?

Yes! Our OBJ repair tool is 100% free to use.

Are there any usage limits when repairing my OBJ file?

No, you can repair as many files as you wish. We do not have any limits when using our OBJ repair tool.

How long does it take to repair my OBJ?

We aim to process OBJ repairs as quickly as possible; this usually takes around 5 seconds; however, this may be longer depending on the file size and data needed to be repaired.

What does the OBJ repair process involve?

Once your OBJ has been selected, it will undergo some initial checks to verify that the file has some basic information. If the initial checks pass, we then upload the file to our servers for more detailed analysis.

Is it safe to repair my OBJ on

Yes, of course it is! Your OBJ, once repaired, is deleted 15 minutes after upload, and any download link will expire after this time.

Can I repair my OBJ on Windows, Linux, Android, iOS or Mac OS?

Yes! Our OBJ repair tool will run on any system with a modern web browser.

OBJ file format information

Full NameWavefront
Type3D Model
Mime Typetext/plain
Opens WithMeshLab, CAD Assistant, DAZ Studio

The OBJ file format is a 3D graphics file format used to define complex 3D models, including geometry, materials, and textures. OBJ files are text files, making them human-readable and easy to modify by hand. The downside to this ease of readability is that the files can become rather large when dealing with large or complex 3D models.

As mentioned, the OBJ format stores not only 3D model geometry but also materials and textures. These materials are usually defined in a separate file with the MTL file extension and specify geometry rendering details such as diffuse and specular color, transparency, and much more.

The OBJ material file can also reference external texture files. These are usually JPEG or PNG files; however, these can be older formats, such as TGA. Where materials are used, the OBJ file will also contain material names preceding the geometry faces they should be applied to. If textures are referenced, the geometry will also contain texture coordinates (UV) for each vertex.

Repairing a OBJ File

OBJ 3D Model File Header Data

As is common amongst 3D model file formats, OBJ file formats may contain data within their header to help identify the type of file should the filename extension prove to be inaccurate or missing. With the header data from the OBJ 3D model file, we are able to determine core information such as object count, vertex count, faces, textures, and other information, which can then be used to check the validity of the file.

Vertices, Faces and Geometry

This data forms the core element of any OBJ model and, if damaged, cannot be easily recovered. Our OBJ repair tool will try its best to repair and reconstruct any 3D model file it detects to be missing geometric data.


With some 3D model file formats, such as OBJ, textures are stored as separate files. If these are missing, they will not be able to be restored. Our tool will detect these external texture file references and ignore them. For other formats where the textures are embedded within the main 3D model file, these will be repaired where possible.

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