Free macOS app · v0.1.0

Open Bambu `.lac` files in any cutter.

Convert Bambu Studio's laser project format to a layered SVG with a settings sidecar so you can engrave uploaded Makerworld designs on whatever laser you already own.

Download for macOS 2.3 MB · macOS 14.0 Sonoma or later · Apple silicon

A loaded .lac file showing the SVG preview of a cat puzzle with the sidebar listing layers and material. — Preview, layer counts, material, and bounds — all there before you save.

Why do I need this?

The problem

Makerworld is full of beautiful laser-cut designs but the files come as .lac, a Bambu-only format. To open one you're expected to install Bambu Studio (1 GB+) and work through a complex UI. If you have an xTool, WeCreate, Creality Falcon, a classic CO₂, or a vinyl cutter, you're locked out of an entire library of free designs.

The fix

LAC Converter unzips the project, walks the canvas tree, and emits clean SVG with layers preserved by laser operation type. It also writes a sidecar with the recommended power, speed, and pass count so you can transfer Bambu's tested settings into your cutter's software without guessing.

What you get

Layered SVG output

Cut, score, engrave-line, and engrave-fill each land on their own layer with the right colors — ready to assign in xTool Creative Space, LightBurn, or any cutter you already use.

Settings sidecar

Every export drops a plain-text sidecar listing material, machine, power, speed, passes, and air assist for each layer — Bambu's recommended profile, copy/paste straight in.

Multi-plate aware

Files with multiple plates or canvases convert to one SVG per plate and you can save them all in a single click. Multi-canvas H2D files just work.

No 1 GB Bambu Suite

You shouldn't need to install a 1 GB+ slicer just to read a vector file. LAC Converter is a 3.6 MB native macOS app and runs fully offline.

Drag and drop

Drop a .lac onto the window. SVG appears in the preview, layer counts and material show in the sidebar, save when ready. No projects, no logins.

Use anywhere

The output is plain SVG — open it in xTool, WeCreate, Creality Falcon, LightBurn, Glowforge, Inkscape, Illustrator, or anything else that reads vectors or preps files for laser cutting.

Every export ships with this sidecar

A plain-text .txt next to your .svg with the material, machine, and Bambu's recommended laser settings broken out per layer so it lines up with what's in your cutter's software.

LAC Converter — Settings Summary
================================

Source file: Chat+Puzzle.lac
Material:    3mm Basswood Plywood  (B-YA-A-A-X0)
Vendor:      BambuLab
Thickness:   3 mm
Category:    Wood
Machine:     Bambu Lab H2C-40W
Canvas:      Canvas 1
Bounds:      158.542 × 232.827 mm

Layer settings (apply these in xTool / LightBurn after import)
--------------------------------------------------------------

Cut  (#FF0000, 41 objects)
  • LaserLineCut:
      Power:  100%
      Speed:  16 mm/s
      Passes: 1
      Air assist: on

Engrave-Image  (—, 1 object)
  • LaserImageEngrave:
      Power:  55%
      Speed:  450 mm/s
      Passes: 1
      Air assist: on
      Scan interval: 0.1 mm

Generated by LAC Converter — these are Bambu's recommended
settings for this material. Verify on a test piece before
running the full job.

Works with

xTool Creative Space
WeCreate
Creality Falcon / Make
LightBurn
Glowforge
Inkscape · Illustrator · Affinity
Anything that reads SVG

Download

LAC Converter 0.1.0 · 2.3 MB

Requires macOS 14.0 Sonoma or later · Apple silicon

Download .dmg

How to install

Mount the disk image. Double-click LACConverter.dmg. macOS will ask "Are you sure you want to open it?" because it was downloaded from the internet — click Open. Finder then opens a window with the app icon next to a shortcut to your Applications folder.
Drag LACConverter onto the Applications folder. That copies the app into /Applications.
Try to launch it from Launchpad or Applications. macOS Sonoma 14.4+ and Sequoia will block it the first time with a "could not verify... is free of malware" dialog because the app isn't notarized yet. Click Done.
Approve it once. Open Privacy & Security Scroll to the bottom of that pane — you'll see "LACConverter.app was blocked...". Click Open Anyway, authenticate with Touch ID or your password, then confirm Open Anyway on the second dialog.
You're done. The app launches and double-clicking works normally from then on.

This build is unsigned — I'm distributing it for free testing before committing to the $99/yr Apple Developer Program. The "approve once" step is gone the moment I notarize it.

Open Bambu .lac files in any cutter.