One-inch test grid on laser bed

One Inch Test Grid and Checklist: Laser Engraving File Types for Makers

Use vector files (SVG, DXF, AI, or PDF) whenever a laser needs to cut, score, or trace a clean outline, and switch to high-resolution raster files (PNG by default, BMP or TIFF when a controller needs an uncompressed image) for photos and grayscale engraving. Most real jobs mix both: a cut outline plus a photo inset, which means you often need a layered file or two separate exports rather than one all-purpose format.

TL;DR:

  • Use SVG, DXF, AI, or PDF for precise cut outlines and engraving paths, while PNG or TIFF are better suited for photo and grayscale engraving.
  • SVG files are the most portable and compatible for laser software, but embedded raster images inside SVGs lack cut paths, requiring separate exports.
  • Grayscale photos for engraving should be exported at 300 to 600 pixels per inch, with contrast controlled before import to avoid rework.
  • Programs like LightBurn support many formats, with SVG being the most versatile, whereas Glowforge has limited DXF support and prefers SVG or PDF for cutting.
  • For mixed jobs, organize layers or colors clearly, confirm scale with a test grid, and verify file contents before sending to prevent costly mistakes.
Handmadeohiocrafts
handmadeohiocrafts.com
Turn Artwork Into Engraved Pieces
HandmadeOhio creates personalized gifts and promotional products with in-house laser engraving for businesses, teams, nonprofits, and individuals.
Explore laser engraving

Table of Contents

Vector vs raster: how lasers read your file

A laser does not see colors or pixels the way you do. It reads a file as either a set of mathematical paths or a grid of dots, and that single distinction decides what the machine actually does with your artwork.

Vector files store paths: lines and curves defined by coordinates. A laser follows those paths exactly, which is why cutting, scoring, and clean outline engraving all require true vector geometry. Ask a laser to cut from a raster image and it has no path to follow, only shapes made of pixels.

Raster files store a grid of pixel values. That makes them the right choice for anything with tone or gradient: photographs, shaded portraits, halftone patterns, or dithered artwork where the laser varies its power dot by dot to create light and dark areas.

A few common jobs show the split clearly:

  • A cut-only keychain outline needs a clean vector path, nothing else.
  • A grayscale pet portrait on a tumbler needs a raster image with enough resolution to hold detail.
  • A sign with a cut border and an engraved logo inside it needs both: a vector layer for the cut and a raster or vector layer for the engraving, kept separate so the software treats them as different operations.

Mixed jobs are where most file problems start, and keeping the two file families distinct from the beginning avoids most of them.

Vector formats: SVG, DXF, AI, and PDF compared

Each vector format carries slightly different information, and picking the right one saves a round of back-and-forth before a job ever reaches the bed.

SVG is the most portable option for laser work. It stores paths along with color and layer data, which most laser software, including LightBurn, reads natively, and it travels well between design apps and machines, according to LightBurn’s documentation on importing artwork. The one catch: an SVG can have a raster image embedded inside it, which looks fine on screen but gives the laser no path to cut along for that element.

DXF is the CAD standard, built for precise geometry rather than design flourishes, as detailed in this ring design software for wholesale suppliers and retailers guide. It is a dependable fallback for shop-to-shop handoffs where exact dimensions matter, but DXF files can lose unit information on export, so a file built in millimeters can import as inches and throw off your entire scale, a problem Craftgineer’s laser file prep guide flags directly.

AI files are fully editable in Adobe Illustrator but are not a universal machine format. Treat AI as your working file and export to SVG or DXF for the software that actually drives the laser.

PDF sits in between: most vector editors can save to PDF, and most laser software can open one, but how cleanly the paths survive depends on the export settings used to create it.

Before sending any vector file to a laser, run this check:

  • Outline all text so fonts do not substitute or shift.
  • Simplify excess nodes so curves cut smoothly instead of jaggedly.
  • Scan for open paths, since a gap in what should be a closed loop can leave a cut unfinished.

Open paths hide in plain sight at normal zoom.*

Raster formats: PNG, JPG, BMP, and TIFF for photo engraving

For photo and tonal engraving, the format you choose affects image quality as much as the settings on the laser itself.

PNG is the default raster choice for most laser work because it is lossless and preserves dithering patterns exactly as created, a point echoed in VectorWitch’s comparison of SVG and PNG for laser engraving. JPG compresses the image and can introduce artifacts around edges and in smooth gradients, which shows up as unwanted speckling once the laser burns it into material. BMP and TIFF are uncompressed formats some older controllers require; they are larger files but avoid any compression loss.

Resolution matters more than file size. Set the final physical dimensions and pixel count before exporting, not after, since resizing a raster image after export degrades the detail the laser needs for crisp tonal work.

  • Export grayscale photo engravings at 300 to 600 pixels per inch at final size, adjusting toward the higher end for fine detail or hardwoods that burn unevenly.
  • Convert color images to 8-bit grayscale before export rather than letting the laser software do the conversion, so you control the contrast yourself.
  • Test the dithering mode in your laser software (Jarvis, Stucki, and Newsprint are common options) on a scrap piece before committing to a full run, since each produces a different texture.

Getting resolution and bit depth right before export saves far more rework than adjusting laser power after a bad test burn.

Which software reads which file: LightBurn, Glowforge, and LaserGRBL

Matching your export to your software avoids the most common “file won’t open” support ticket.

  1. LightBurn accepts the widest range: .SVG, .DXF, .AI, .PDF for vectors and .PNG, .JPG, .BMP, .GIF, .TIFF for rasters, and it also has native .LBRN and .LBRN2 project files that preserve layer and machine settings, according to LightBurn’s file management reference. Importing someone else’s .LBRN file brings the artwork, not necessarily their machine settings.
  2. Glowforge prefers SVG and PDF for cutting and engraving work, and accepts PNG or JPG for engraving-only jobs. DXF support can be limited to paid account tiers, so check the app before relying on it for a cut job, per Glowforge’s upload guidance.
  3. LaserGRBL handles raster engraving well but treats vector work more simply, often requiring a separate pass or conversion step rather than reading mixed vector and raster layers in one file.

Whatever software you use, confirm what file type the machine controller itself expects on export, whether that is G-code, RD, OUT, or UD5, since the software-side file and the machine-side file are not always the same thing.

How to prepare a file for a combined cut and engrave job

A mixed job fails more often from scale mismatches and mislabeled layers than from bad artwork, so work through these steps in order.

  1. Set your document units and final physical dimensions first, before placing any artwork, so everything exports at the size you intend.
  2. Organize cut, score, and engrave operations on separate layers or by distinct color codes, and use thin hairline strokes for cut paths so the software recognizes them as lines rather than fills.
  3. Only convert a raster image to vector when you actually need cuttable paths. Use an image trace tool, then manually clean up stray nodes and merge any paths that should be one continuous line.
  4. Run a final export check: confirm all text is outlined, delete any invisible or stray shapes left over from editing, then import the file into your target software and verify the dimensions match what you set in step one.
  5. Decide whether to send a native source file (AI, PSD, or a similar working file) or an exported SVG/DXF to a production shop. Native files let someone else make quick edits; exported files are safer when you want the geometry locked exactly as you built it.

Pro Tip: Keep a plain-text note with the file listing which color or layer means cut versus engrave. It takes thirty seconds and prevents the single most common mixed-job mistake.

Rasterizing filter effects before export matters too: some software needs any applied effects baked into a raster layer first, or the machine will not interpret the toolpath correctly once imported, a caveat raised in a Glowforge community discussion on combined vector and raster files.

Shop-tested checks that catch mistakes before they cost material

Before running anything on expensive stock, we build a small test grid into the file: a one-inch ruler path alongside the artwork. Importing that grid into the target software confirms scale in seconds, since a ruler that imports at 0.9 inches tells you immediately that something shifted on the way in. We also run a quick hairline test cut on scrap material from the same batch before committing to the final piece, since burn settings vary slightly between material lots. Our guide to laser engraving on wood covers this test-grid approach in more detail for that material specifically.

We also ask customers submitting files to include clear naming (cut_outline, engrave_photo) and a version number, since a mislabeled layer is the fastest way to waste a blank. For complex edits, sending the native source file alongside the exported SVG or DXF lets us adjust without guessing at your intent.

File prep for wood, acrylic, and metal engraving

The file format rules stay the same across materials, but how you prepare the artwork shifts with what you are burning.

Wood has visible grain, which competes with fine detail. Keep photo engravings on wood at a lower pixel density than you would use on a smoother surface, and favor bolder dithering patterns that read clearly even where the grain interrupts a line. Test on an offcut of the same wood species, since oak and birch plywood burn at noticeably different contrast levels.

Acrylic rewards crisp vector work. Cut lines should be true hairlines with no double paths, since acrylic can melt and refuse at an edge if the laser passes over the same line twice. For engraved frost effects on acrylic, a raster file with clean, high-contrast edges holds up better than a soft gradient.

Metal engraving, including stainless steel tumblers, typically uses a marking compound or direct laser interaction depending on the machine, and file prep leans toward vector outlines for logos with raster fills reserved for photo-style work. Our settings guide for engraving stainless steel covers the material-specific adjustments that pair with a properly prepared file.

Across all three materials, the file itself does not change format based on the surface. What changes is resolution, dither choice, and how conservatively you test before running the full piece.

File prep for wood, acrylic, and metal engraving — overview diagram

Hobbyist vs. production: how far to take file prep

A hobbyist running occasional jobs can often get away with quick SVG and PNG exports straight from a consumer design app, catching problems with a fast test cut rather than exhaustive file auditing. A production shop running the same file repeatedly, or handing files between machines, needs tighter habits: verified vector exports, explicit unit checks on every DXF, and consistent layer naming so nothing depends on memory.

The rule of thumb holds either way: choose whichever format puts the least interpretation work on the machine. A clean path beats a path the software has to guess at, every time.

— Aaron

How HandmadeOhio helps with engraving-ready files and blanks

We produce laser-engraved pieces in-house, so when a file arrives clean, in the format your job actually needs, turnaround stays fast and there is no minimum order to hit first. Send us a vector file (SVG or DXF) for outlines and logos, and a high-resolution PNG for photo or grayscale work. If you would rather skip file prep entirely, our White Rainbow 40oz Laser Engravable Tumbler is a ready blank we can engrave from your artwork start to finish.

White Rainbow 40oz Laser Engravable Tumbler

File type you send Best for What we need from you
SVG or DXF Cut outlines, logos, text Outlined fonts, closed paths
PNG (grayscale) Photos, tonal portraits Final size and resolution set before export
Native source (AI/PSD) Complex edits before production Clear layer or color labeling

We ship nationwide, and beyond laser engraving we also handle custom apparel, custom tumblers, and DTF printing through our Gang Sheet Builder for apparel decoration alongside engraved goods.

FAQ

What type of file is best for laser engraving?

Vector formats (SVG, DXF, AI, or PDF) work best for cutting, scoring, and outline engraving, while high-resolution raster formats (PNG by default) work best for photo and grayscale engraving. Most laser software, including LightBurn, supports both families, so the right choice depends entirely on the operation.

Is SVG or PNG better for laser engraving?

SVG is better for geometric precision, cuts, and clean lines because it stores scalable paths. PNG is better for photo and tonal engraving because it is lossless and preserves dithering, a distinction detailed in VectorWitch’s SVG versus PNG comparison. Many projects need both, applied to different layers of the same job.

What is the best file type for LightBurn?

LightBurn supports a wide range of vector formats (.SVG, .DXF, .AI, .PDF) and raster formats (.PNG, .JPG, .BMP, .GIF, .TIFF), plus its own native .LBRN and .LBRN2 project files, according to LightBurn’s documentation. SVG tends to be the most reliable all-purpose choice since it carries layer and color information cleanly.

How do I make my own laser engraving file?

Start by setting your document to the exact physical size you need, then build cut lines as true vector paths and any photo or tonal elements as a high-resolution grayscale raster. Convert text to outlines, remove stray or open paths, and import a test file with a one-inch reference object to confirm scale before running the final piece.

What is the best file type for Glowforge?

Glowforge works best with SVG or PDF for cutting and engraving, and PNG or JPG for engraving-only artwork. DXF support can be limited depending on account tier, so Glowforge’s upload guidance is worth checking before relying on it for a cut job.

Sources

Back to blog