Repair STL Mesh

Use our free and fast online STL mesh repair tool. Our tool will take your STL file and run various tests on it to verify it is valid and suitable for 3D printing and other applications where the integrity of the mesh is critical. If any defects are detected, such as non-manifold edges, then you will be given the choice to repair and download the repaired file.

Once you have uploaded your STL 3D mesh file, if there are any faults with the mesh, our tool will show you a list of detected issues and give you the option to repair it.

Repair your STL mesh

Here are three simple steps to repair your STL mesh file in any web browser.

Upload an STL

Click the "Upload a File" button and select an STL to upload. The maximum file size is 500MB.

View any mesh problems

View any defects with the mesh, and when ready, click the Repair button.

Download your repaired STL File

Click the download link once completed to receive your repaired STL mesh file.

File Format Information for STL

Extension	STL
Full Name	Standard Triangle Language
Type	3D Model
Mime Type	application/vnd.ms-pki.stl
Format	Text & Binary
Tools	STL Converters, 3D Model Voxelizer, Create STL Animation, Compress STL, Text to STL, STL Viewer
Open With	Blender, Daz Studio, MeshLab, CAD Assistant

Description

The STL file format has its roots in the 1980's and is the native file format for 3D Systems stereolithography CAD software. The format defines a triangulated mesh with vertices and faces and is a popular format for sharing 3D printable model files.

There were several formats that attempted to extend the STL format, namely SolidView and VisCAM, whose formats included limited 15-bit color information for each mesh face, which is often ignored by most modern 3D software. The STL format can be either text or binary; our tools will support both formats.

Frequently Asked Questions

How can I repair my STL file?

First, click the "Upload..." button and select your STL file to upload. You will receive a health report for your uploaded mesh along with the option to repair it. When your STL file has been repaired, you can download it right away.

What defects can be detected and cured in my STL mesh file?

The defects that our mesh repair tool can identify and fix are: Holes (Open boundaries), Flipped faces (Inside-out winding), Zero-thickness (Paper-thin shells), Loose bits and more.

How long does it take to repair my STL file?

We aim to repair all STL files as quickly as possible; this usually takes around 5 seconds but can be more for larger, more complex files that contain many defects, so please be patient.

Is it safe to repair my STL file on ImageToStl.com?

Yes, of course! We do not store the STL file you submit to us. The repaired mesh file, once created, is stored for 4 hour after upload before being deleted. You can create a long-term download Url that will ensure the file is retained for 24 hours, allowing you to download when convenient. There is a Delete button too, allowing you to delete the file immediately if you wish.