Measure
Volume, surface area and bounding box are extracted the moment the file loads. Click a face and distance, diameter, wall thickness and gap are computed live.
No conversion. No upload. Open it locally in a second.
No uploading to someone else's server, no licence to buy. Double-click the file on your own machine.
- CAD
- .step.stp.iges.igs.brep.brp
- Mesh
- .stl.obj.ply.off.3mf.glb.gltf
- Offline
- Works with no internet connection. Opening files, measuring and inspecting all happen on your computer.
- Large files
- No size limit. Files are read straight from disk, so large assemblies that online viewers refuse will open here.
- Mac & Linux
- Opening, measuring, inspecting and pricing work the same on macOS and Linux.
Take it past rotate-and-zoom, into real design review
Where most free viewers stop, review begins. Three things that used to need a paid CAD seat.
Section
Drag one plane and the inside opens up. Hidden ribs and bosses, internal cavities and interference between parts, all at a glance.
Inspect
Thin walls, gaps, holes, flipped normals and non-manifold edges are found and painted onto the model. You see where the problem is on the geometry itself, not in a list.
One mesh error shouldn't send the file back to the designer.
No need to reopen CAD. Sign in to Creallo once and fix it where you found it.
Open edges (holes)Inverted shellsDegenerate triangles · duplicate facesNon-manifold edges
Pull exactly the part you need out of a complex assembly
Open a STEP assembly and the original part names and colours come with it. Toggle parts to review the structure, then export just the ones you need as STL.
Share a model with a link. Don't ask the other side to install anything.
Send a URL to purchasing, to management, to the customer. They can rotate the model and check its size in a browser, with no design software.
See what the part costs while you're looking at it.
Numbers taken from the geometry give you reference prices for 3D printing, CNC and vacuum casting at once.
What separates Creallo Atlas from a free web viewer
File security, inspection, repair, and the path to an order. Compare it with a viewer that only renders.
| Typical web viewer | Creallo Atlas | |
|---|---|---|
| File security | Must be uploaded to open | Opens offline, on your machine |
| Size limit | Capped file size | No size limit |
| Measurement | Mostly rotate and zoom | Distance · diameter · wall thickness · gap |
| Inspection | No sections, no thickness | Section view · thickness map · geometry check |
| Repair | Nothing you can do | Fixable errors repaired on the spot |
| Part extraction | Tree is visible, export is not | Browse the part tree · export per part |
| Path to an order | You look, and that's it | Reference quote → order at Creallo |
Built by a team that makes parts.
Creallo Atlas exists because manufacturing collaboration kept stalling on who had a CAD licence. It grew out of real ordering work with robotics, IoT and defence companies.
- Manufacturing projects
- 10K+
- Repeat order rate
- 80%
- Customer rating
- 4.9
- Production partners
- 100+
Figures from the Creallo manufacturing platform · ISO 9001 quality · ISO 27001 information security · ISO 14001 environmental management.
Common questions
What is Creallo Atlas?
A free program for opening 3D files, measuring them and inspecting them, with no CAD needed.
It runs on Windows, macOS and Linux.
Do I need an account?
Opening files, measuring, section views, thickness checks, mesh diagnosis and STL export all work immediately without signing in. Only the collaborative features — automatic mesh repair, merging parts and share links — need a Creallo account.
Is there a file size limit?
None at all when you work on your own machine. The limit applies only to share links: up to 50MB per file, in .stl, .step or .stp.
Can I use it commercially?
Yes. You can use it for company work without restriction.