No accounts. No tracking.

Small, fast tools for people who make things

Viewers, editors and converters for Mac, iPad and iPhone. Each one does a single job, natively, without asking who you are or sending your files anywhere.

Preview3D

for Mac, iPad, iPhone & Vision Pro

Open STEP, STL, OBJ, glTF, 3MF and G-code natively — with Quick Look previews, thumbnails and one-click conversion.

MaciPadiPhoneVision Pro

Download on the App Store$9.99 one-timeWebsite Feedback

PreviewMD

for Mac, iPad & iPhone

A native Markdown editor and viewer with real Quick Look in Finder, math, Mermaid diagrams and PDF export.

MaciPadiPhone

Download on the App StoreWebsite Feedback

PreviewSVG

New

for Mac

Opens SVG and .svgz files natively, with dark and checkerboard canvases, PNG/PDF/DXF export and SVGO optimization built in.

Mac

Download on the App StoreWebsite

Extent

New

for Mac

Mounts Linux disks in the Finder — ext2, ext3 and ext4 through the file system extensions built into macOS.

Mac

Download on the App StoreReading is free · writing ext4 is a one-time purchaseWebsite

Defragment

New

for iPhone & iPad

The disk defragmenter you used to watch for hours, as an ambient toy: a full-screen grid of squares that tidies itself up, forever.

iPhoneiPad

Download on the App StoreFree · optional PlusWebsite

StepKit

In development

for Apple platforms

A from-scratch, pure-Swift STEP (ISO 10303) loader, B-rep kernel, tessellator and Metal viewer — no third-party CAD kernels.

MaciPad

Website

No account, everNo tracking, no telemetryFiles stay on your deviceNo subscriptions