Search for design software for laser cutting and you will be handed four completely different kinds of program as if they were interchangeable. They are not. A vector editor, a box generator, a general 3D CAD package and a laser-native parametric tool all end in a cuttable SVG, and that is the only thing they have in common.
This is a guide to picking the right category for the thing you are actually making. No rankings, no scores. Just what each kind is genuinely good at, and the one question that decides between them.
Start with the question that actually decides it
Before comparing features, answer this:
When the material changes, does the design have to change with it?
If you cut one material, one thickness, forever, almost anything works. The moment you switch from 3 mm to 4 mm plywood, or a customer asks for the same box 40 mm taller, the categories separate hard. Everything below is really a description of what happens to your file on that day.
1. Vector editors — Inkscape, Illustrator, Affinity Designer
These are drawing programs. You place lines and shapes on a flat canvas and export SVG or DXF. They are the most flexible option on this list because they do not know or care what you are drawing.
Good at: engraving artwork, signage, lettering, logos, ornaments, anything decorative, and any one-off flat shape you can see in your head. Inkscape is free and the file formats are open.
The catch: nothing in the drawing knows it is a joint. A tab is just a rectangle. If the panel thickness changes, you edit every tab and every slot by hand, and you will miss one. This is not a flaw in the software — it is what a drawing program is.
Pick this when: the cut is mostly art, or the geometry is simple enough that redrawing is cheaper than setting anything up.
2. Box generators — MakerCase, Templatemaker, boxes.py
You choose a shape from a list, type in dimensions and material thickness, and it hands you a finished cut file with the joints already worked out. Most are free, and several run in a browser with nothing to install.
Good at: boxes. Genuinely good at boxes. If you need a finger-jointed enclosure at specific internal dimensions, a generator will produce a better file in two minutes than most people draw in an hour, and the finger spacing will be mathematically even. boxes.py in particular covers a surprising range of shapes beyond plain rectangles.
The catch: you can only make what the author already programmed. There is no way to add a cable slot in a particular place, change one wall, or design something that is not in the menu. When your project stops matching the template, the generator has nothing left to offer.
Pick this when: the thing you need is on their list. Do not fight a generator into being a design tool — use it, then move on.
3. General 3D CAD — Fusion, FreeCAD, Onshape
Full mechanical CAD. You model the object in 3D, sketch with real constraints, and drive dimensions from parameters. Change one number and the model rebuilds.
Good at: anything that has to fit something else in the physical world — a bracket around a known motor, a case for a specific board, parts that mate with 3D-printed or bought components. The parametric model is the point: the design holds its intent when a number changes.
The catch: two of them, and neither is about capability. First, the learning curve is real — sketches, constraints, extrudes and the parameter table are a genuine skill, not an afternoon. Second, these tools do not think in sheets. Getting from a 3D model to a nested, kerf-corrected, laser-ready flat file is extra work every single time, and laser-specific concerns like kerf compensation and tab-and-slot fit are yours to solve by hand.
Pick this when: the part is mechanically demanding, or laser cutting is one of several processes you use.
4. Laser-native parametric tools
The newest category, and the smallest: tools that are parametric like CAD but built around flat sheet material and a laser from the start. FlexCut3D is one of these; there are others.
Good at: the middle ground the other three leave empty — you draw your own part, not a template, and then attach a parameter to whatever dimension needs to move. Material thickness, overall length, the position of a cutout. Change the number, and every joint that depends on it updates together.
The catch: they are narrower by design. If your project is not going through a laser, a tool built for lasers has no advantage over real CAD, and probably fewer features.
Pick this when: you make the same design repeatedly in different sizes or materials, or you sell files and buyers ask for variations.
The test that separates them
Here is a five-minute test worth running on any tool you are considering, with any part you have already made.
- Open the design.
- Change the material thickness by 1 mm.
- Count how many things you had to touch by hand.
In a vector editor: every tab, every slot, every joint. In a generator: one field, but only if the shape was on the menu. In CAD: one parameter, then the flat-file work again. In a laser-native parametric tool: one value, and the sheet is still ready to cut.
That number is the honest comparison. It is also the number that decides how you feel about a customer asking for the same thing, but bigger.
So what should you pick
Most people who cut regularly end up using two. A vector editor for artwork and engraving, and something parametric for anything with joints — because those two jobs are genuinely different and no single program is best at both.
If you are choosing your first one: start with the free option in the category that matches what you make most. Inkscape if it is mostly art. A generator if it is mostly boxes. Something parametric if the phrase "and now in 6 mm" makes you wince.
The wrong move is picking on features. Pick on what happens the day the material changes.
FlexCut3D is a parametric design tool for laser cutting that runs in the browser — nothing to install. You can open it and draw something, or read the longer walkthrough on how a tab-and-slot joint actually gets its numbers.
Whichever kind you land on, the file still has to carry the right numbers. Measuring your laser's kerf is how you find them, and finger joint sizing is where they get used.