Share the source. Shape what comes next.

Build better 3D models.
Together.

A shared place for your model and its next version. Share editable STEP files, improve them in CAD, compare changes and get an STL when it is time to print.

See how it works

Free account to collaborate. Just comparing files? No account needed.

One model. A shared next step.

From a source file to a better part.

Follow the model

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Share the starting point.

Keep the editable STEP with its model. Invite collaborators to the Project, or explicitly share the original files with a source link.

Sharing files and access

The real revision inspector with sensor-plate.step and the Download model action.

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Make the next version.

Download the source, improve it in your CAD editor and upload a new revision. The earlier model and its originals stay in the history.

How to contribute

Three saved revisions in the real Versions history.

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See what changed.

Select two revisions and inspect the shape that was added or removed. Share an interactive review link so someone else can check the difference.

Compare and review

The real Changes viewer comparing mounting plate revisions 2 and 3.

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Keep the source. Print the result.

Enable free STEP to STL conversion in the Project. Each STEP upload keeps the editable original and generates an STL to download and check in your slicer.

STEP to STL, explained

Sensor mounting plate in the STL Diff Versions workspace: revision history, 3D model, original STEP and download controls. — One example, three revisions. These are screenshots of the working product, not interactive controls.

Built for the handoff

Not just a file to download.
A model to develop.

STL Diff is for the work between the first upload and the finished part. Bring your collaborators, keep the editable files and make each iteration understandable.

More than the mesh.

Keep STEP and native CAD originals alongside a preview model. Share something another maker can actually build on.

Original files & sharing

A history you can follow.

Named revisions keep the model, files and context together. Find an earlier version without searching through chat attachments.

Projects & revisions

A difference you can see.

Inspect added and removed geometry, even with different triangulation. Send a visual review link, not just a screenshot.

Try the free diff tool

Your people, one project.

Invite collaborators with explicit roles. Pro owners can also require approval before new revisions are published.

Roles & reviews

Collaboration today uses invitations and explicit sharing links. A public community catalogue is not available yet. Your CAD editor remains the place where you edit the model.

Start small. Keep making.

The first shared project is free.

Original files, revision history and optional STEP to STL conversion are included.

Compare all plans

Free

1 project · 20 revisions per project
500 MB storage
Share models and editable originals.

More roomPRO

10 projects · 100 revisions per project
2 GB storage
Approval workflows and email updates.

The next version starts here

Bring a model.
Invite someone to make it better.

Read the getting-started guide

Build better 3D models.Together.