How to Prepare a Photo for Laser Engraving
To prepare a photo for laser engraving, convert it to grayscale, boost contrast so the subject separates from the background, set the resolution to match your laser's DPI, and choose a dithering mode suited to your material. Engraving burns the image tone-by-tone, so darker pixels burn deeper and lighter pixels barely at all — which means a flat, low-contrast photo engraves into mush, while a well-prepared one looks crisp.
Step by step
- 1
Crop to the subject
Fill the frame with what matters (a face, a pet) and remove distracting background so the engrave focuses on the subject.
- 2
Convert to grayscale and boost contrast
Engraving reads brightness, not colour. Increase contrast so highlights stay light and shadows go dark — flat photos engrave muddy.
- 3
Match resolution to your DPI
Size the image so its pixels-per-inch roughly matches your engrave DPI (e.g. ~254 DPI). Too few pixels looks blocky; far too many is wasted.
- 4
Pick a dithering mode
For wood and slate, a dither or halftone pattern (Jarvis, Floyd-Steinberg, or your software's photo mode) renders smooth tones from on/off burns.
- 5
Test on scrap
Engrave a small version on the same material first. Adjust contrast and power, then run the final piece.
Why engraving needs different prep than cutting
Cutting needs clean vector shapes. Engraving needs tonal range. The laser engraves a photo by varying how much it burns each spot, so the file is a grayscale raster, not a vector. The whole game is contrast and resolution: give the laser a clear, contrasty grayscale image at the right resolution and it reproduces the photo; give it a flat, low-res one and it produces a grey blur.
Material changes everything
Wood engraves dark-on-light and loves contrast and dithering. Slate engraves light-on-dark (the burn turns lighter), so you often invert the image. Anodized aluminium and coated metal (fiber lasers) engrave crisp and high-contrast, so they handle finer detail. Match your prep to the material — the same photo needs different treatment on wood vs slate.
Let the tool do the prep
Good engraving prep — background cleanup, grayscale, contrast, depth-mapping, and the right resolution — is fiddly by hand. A tool built for it converts a photo into an engrave-ready image in one step, including styles like a pencil-depth 3D map that variable-power lasers carve as relief.
Try it yourself
Turn a photo into a laser-ready file in about a minute — free, in your browser.
Prepare a photo for engravingFrequently asked questions
What format does a laser engraving photo need to be?
A grayscale raster image (PNG or JPG) with good contrast, sized so its resolution matches your engrave DPI. For cutting you need a vector; for engraving you need a good grayscale image.
What DPI should the photo be for engraving?
Match it roughly to your engrave DPI — around 254 DPI is common. The image's pixels-per-inch at its physical size should be in that range so detail maps cleanly to the laser's scan lines.
Why does my engraved photo look washed out?
Usually low contrast. Convert to grayscale and increase contrast so highlights stay bright and shadows go dark before engraving. Also check that your material suits photo engraving.
Do I need to invert the image for slate?
Often yes. Slate engraves lighter than its surface, so inverting the photo (so dark areas of the photo become the un-engraved dark slate) gives a correct-looking result.
Related guides
Best Laser Settings for Engraving Wood (A Practical Guide)
How power, speed, and DPI work — and where to start.
Best Materials for Laser Engraving (and How They Look)
Wood, slate, leather, metal — how each one engraves.
How to Convert a Photo to SVG for Laser Cutting
Turn any photo into a clean, cuttable SVG — the right way.