Missing Previews

Your designs deserve more than a file icon. Bring CAD models, circuit boards, print files, and Markdown to life in Finder.

View on the Mac App Store Explore the formats ↓

Supports Apple Silicon Macs running macOS 13 or later.

A colored STEP circuit-board assembly displayed directly in Finder Quick Look over the diffused window background
A closer look at your next idea. No separate CAD app to launch.
01 / Familiar

Right where your files are.

Select a supported file in Finder and press Space. Orbit models or explore drawings without breaking your flow.

02 / Private

Your files stay on your Mac.

Previews are processed locally. No account, file uploads, or analytics in the app.

03 / Useful

Recognize it at a glance.

Finder thumbnails help you spot supported design files before you even open a preview.

From copper to components

See the board.
Keep the context.

Explore KiCad boards and schematics, Gerber fabrication layers, and Excellon drill files from the same familiar Quick Look window.

See format details →
KiCad PCB preview with colored copper layers, pads, and component outlines

More than plain text

Notes with
the whole picture.

Read Markdown with headings, tables, code, and task lists. Mermaid turns diagram definitions into diagrams you can actually follow.

Choose GitHub with Mermaid, GitHub Flavored Markdown, or CommonMark in the app.

Markdown notebook showing a checklist and a rendered Mermaid sequence diagram

A small app. A wider view.

Built for the files you make.

CAD & drawings

STEP · STP · DXF

Inspect 3D assemblies or pan and zoom a vector drawing.

3D models

3MF · glTF · GLB

See model geometry and supported source materials.

3D printing

G-code · BG-code · UFP

Preview decoded toolpaths and available print details.

Electronics

KiCad · Gerber · Excellon

Check boards, schematics, copper layers, and drill files.

Documents

Markdown + Mermaid

Read formatted notes, checklists, and rendered diagrams.

Format support varies: Markdown provides previews, not Finder thumbnails. glTF requires self-contained assets; external buffers and textures are unsupported. Binary G-code falls back to an embedded image when usable motion data is unavailable. Full compatibility and setup details →

Missing Previews

Less opening.
More seeing.

View on the Mac App Store ↗

Questions? We’re here to help.