A new dimension for your ideas

Big ideas.
Beautifully
shaped.

Meet Kallisto Stereon. Turn a simple sketch into something solid with an expressive, precise 3D modeling workspace.

Download for Windows See it take shape

Free & open source · Windows x64 · v1.2.3

A little imagination.
A new perspective.
MADE TO TAKE SHAPE
A detailed architectural model being shaped in the Kallisto Stereon 3D workspace
From a sketch. Into your world. 01 / EXPLORE
Shape reality.
One workspace.
So many possibilities.

Sketch with intent

Model in 3D

Find your finish

Make it real

THE CREATIVE TOOLKIT

Room for your ideas.
Tools for every detail.

From the first line to the final finish, keep your creative flow in one thoughtfully equipped workspace.

01

A little more precise.
A lot more possible.

Draw on faces, snap to geometry, and type exact measurements. Guides and dimensions help every piece find its place.

Measured to your imagination
02

Give a line
a whole new life.

Push and pull flat faces into volume. Refine the result with Follow Me, transforms, and solid boolean tools.

03

Your signature.
Every surface.

Explore colors, image textures, and translucent materials. A different finish can change everything.

04

Big project.
Clear head.

Keep groups, components, tags, and scenes in order. The outliner helps you see how it all fits together.

A NATURAL WAY TO CREATE

A spark.
A sketch.
Something real.

Start simple. Add dimension. Make it yours. Stereon brings each step of your modeling process together.

THE FIRST LINE01 / 03
A tray outline drawn in the modeling workspace
Every solid starts with a simple shape.

THINK IT. SHAPE IT.

For what you’re
imagining next.

A piece of furniture. A space to live in. That prototype you can’t stop thinking about. Give your next idea some room.

A furniture model with precise dimensions in the 3D modeling workspace
Good ideas are in the details.MODELING / MEASUREMENT

Beyond
the screen.

Take your work into its next chapter. Export for 3D printing, share a 3D asset, or prepare a scaled print.

.STL.3MF.GLB.USDZ.SVGPDF print

Save editable projects in the native .hew format.

YOUR NEXT IDEA STARTS HERE

Less imagining.
More making.

Your own space to sketch, model, and explore.
Bring Kallisto Stereon to your desktop.

Download for Windows

Windows x64 · Version 1.2.3 · 42.1 MiB

Free & open source. This release is unsigned.
Setup may download WebView2 if it isn’t installed.

KALLISTO STEREON

Shape reality.

No account needed for local modelingInstaller checksum

A FEW GOOD QUESTIONS

A little clarity.
Then, create.

Get to know your new workspace.

What can I make with Stereon?

Explore furniture, interiors, architectural concepts, and prototypes. Start with sketches, form 3D geometry, add measurements and materials, and prepare your work for sharing or making.

Which download should I choose?

The current release is Kallisto Stereon 1.2.3 for 64-bit Windows. Download the .exe, open it, and follow setup. WebView2 is required and setup can download it if missing. The installer is currently unsigned.

Is it free to use?

Yes. Kallisto Stereon is distributed as free, open-source software under its applicable licenses. Read the licenses and notices or download the corresponding source code for this release.

Can I use it for 3D printing?

You can export STL and 3MF files. Solid boolean tools and model health checks help you prepare geometry. Check your model and print settings in your preferred slicer before printing.

How do I save and share my work?

Save editable projects as .hew files. Export GLB, STL, 3MF, USDZ, SKP, or SVG for other workflows, and use Print for scaled layouts and PDF. Import options include DAE, SKP (2017 and 2026), glTF, GLB, and STL. Autosave and recovery help protect progress; save your project regularly.