Best Fonts for Laser Engraving: Text That Actually Stays Legible
On a 10W diode laser, text below about 5 mm tall requires a bold or medium-weight sans-serif font to remain legible after engraving. The practical minimum stroke width is 0.3 mm — at 254 DPI that is roughly 3 scan lines, the lower limit at which filled letters keep their shape. Anything thinner burns away or fills in. The right font takes ten seconds to choose; the wrong one wastes your material and your time.
- Bold or Black weight sans-serifs are the safest default — Arial Black, Verdana Bold, Century Gothic Bold all engrave cleanly at 5 mm+ height.
- Minimum stroke: 0.3 mm — the practical limit for area-filled text at 254–400 DPI. Anything under 0.3 mm is unreliable.
- Fill mode (raster) for text taller than 6 mm; Line mode (vector) or single-line SHX fonts for text below 4 mm.
- Script fonts can work — at 15 mm+ height, bold scripts like Pacifico engrave well. Below 10 mm, skip them.
Why the laser does not care which font looks nice on screen
Your laser sees a letter the same way a plumber sees a pipe: as a cross-section with a width and a shape. Two things determine whether the engraving works:
- Stroke width. The laser removes material along each scan line. Ultra-thin strokes — the hairlines in many elegant serifs and the thin connections in script fonts — can be narrower than the beam's effective burn width, so the laser either obliterates them entirely or leaves a ragged smear where they should be clean.
- Counter size. Counters are the enclosed spaces inside letters like 'e', 'a', 'g', 'B', 'D', 'R', and 'O'. When a counter is small and the laser is scanning in raster lines at a given DPI, the scan lines at the edge of the counter can bleed across the opening, filling in the hole and turning an 'e' into an indistinct blob. Open, generous counters survive. Tight, small counters fill in.
Screen rendering hides both problems. Fonts are hinted and anti-aliased for screen pixels, which is completely different from what a laser does to wood or acrylic at 254–400 DPI. A font that looks refined on a screen can look terrible engraved at 5 mm height.
What fonts work best for laser engraving?
These categories and examples are drawn from practical community testing (LightBurn forum users, Ponoko's manufacturing guidelines). They are starting points — always burn a small test panel at your actual size before committing to a finished piece.
| Font / Category | Min Height | Mode in LightBurn | Why it works | Confidence |
|---|---|---|---|---|
| Arial Black / Arial Bold | 4 mm | Fill or Line | Uniform thick strokes, generous counters, universal availability | High |
| Verdana Bold | 4 mm | Fill or Line | Wide letters, designed for small-size legibility, excellent counter openness | High |
| Tahoma | 5 mm | Fill or Line | Community favourite (LightBurn forum); clean humanist sans, works well on wood grain | High |
| Century Gothic Bold | 5 mm | Fill | Geometric circles give very open 'o/e/a' counters; reads beautifully on round drinkware | High |
| Montserrat Bold / ExtraBold | 5 mm | Fill | Geometric sans, free on Google Fonts; consistent stroke weight, good for signage text | Medium |
| Georgia Bold (serif exception) | 8 mm | Fill | Designed for small-size screen legibility — serifs are wide enough to survive at 8+ mm | Medium |
| SHX single-line fonts | 2 mm | Line only | Single centre stroke — no fill required. Best option for tiny text (tool-paths on jigs, serial numbers) | High |
| Pacifico / Lobster (bold script) | 15 mm | Fill | Thick, rounded scripts — their strokes are wide enough to survive. Community-verified at 15 mm+ | Medium |
Sources: LightBurn community forum thread "The most legible font — text" (2024); Ponoko digital manufacturing font guide (0.3 mm minimum stroke); community tests cited on both. Starting points — verify with a test burn for your specific machine and material. Last verified: 2026-07-07 — methodology.
What fonts to avoid for laser engraving
- Light, Thin, or Extra-Light weights of any font. The stroke width drops below 0.3 mm at small sizes and becomes unreliable. A font you love in Regular weight may work fine at 12 mm height and burn away completely at 6 mm.
- Condensed or Narrow variants. Condensing a font tightens the counters and reduces the breathing room between adjacent strokes — exactly the two things you do not want at small sizes.
- Thin hairline scripts and calligraphy fonts. The ultra-thin connecting strokes between letters often drop below 0.3 mm and either disappear or merge into a ragged line. At 10 mm and below, always prefer a bold script or a plain sans-serif.
- Fonts with very tight letterspacing. Adjacent characters can merge at the engraved surface as the laser's heat spreads slightly beyond the beam width. Add letter-spacing (tracking) in LightBurn or your design tool if characters are touching.
- Decorative display fonts with inline detail or shadows. Inline stripes, shadows, and layered outlines that look great at large display sizes become a mess at 5–10 mm engraving height.
What font size is safe for laser engraving on wood and acrylic?
This table maps font weight and engraving DPI to the minimum text height where the result stays legible. These are practical minimums — bigger is always better, and a test burn at your exact size is the only way to be certain for your specific machine and material.
| Font weight | Min stroke width | Min height at 254 DPI | Min height at 400 DPI | Recommended mode |
|---|---|---|---|---|
| Black / ExtraBold (900) | 0.5+ mm | 3 mm | 2.5 mm | Fill or Line |
| Bold (700) | 0.35 mm | 5 mm | 4 mm | Fill or Line |
| Medium (500) | 0.25 mm | 8 mm | 6 mm | Fill only |
| Regular (400) | 0.15–0.2 mm | 12 mm | 9 mm | Fill only (risky) |
| Light / Thin (<400) | <0.1 mm | Not recommended | Not recommended | Avoid |
| SHX single-line font | One beam width | 2 mm | 2 mm | Line only |
Stroke widths are approximate — they vary by font design within each weight class. Use these as a guide and verify with a test burn. The 0.3 mm figure is the minimum for reliable results per Ponoko's manufacturing guidelines; LightBurn forum users report similar practical limits. Last verified: 2026-07-07.
How to set up text in LightBurn for laser engraving
The biggest hidden source of bad results is not font choice — it is using the wrong mode in LightBurn, or skipping the scanning offset calibration.
Fill mode versus Line mode for text
Fill mode (also called Raster in some contexts) scans back and forth across the letter, filling the inside of each closed outline. This gives a solid, clean result for text above about 6 mm height. Use Fill mode for any text that looks good as a block of colour on screen.
Line mode (Vector) traces the outline path of the letter as a single laser pass without filling it. This gives an engraved outline — great for a debossed look, for single-line SHX fonts, or for very small text where Fill mode would overscan across the letter. Use Line mode for text below about 4 mm height and for SHX single-line fonts.
Scanning offset — the hidden Fill-mode problem
When a diode laser scans a horizontal line in Fill mode, it accelerates, fires the laser, and decelerates at each end of the line. The deceleration causes the beam to deliver more energy at the ends of each stroke — a visible dark blotch at the left and right edge of each filled letter. This is called "over-burn at the overscan zone."
Fix it in two ways:
- Scanning offset calibration. In LightBurn: Edit → Device Settings → Scanning Offset. Enable it and run the calibration procedure — it tells LightBurn exactly where the laser is actually at full speed so it only fires the laser during the constant-speed portion of the scan.
- Overscan percentage. In the Cut/Layer settings, increase Overscan to 5%. This extends the scan line beyond the letter before decelerating, so the burn-and-decelerate zone falls outside the letter.
Convert text to paths before saving or sharing
Text in LightBurn is linked to the font installed on your computer. If you share the file or open it on a different machine without the same font, LightBurn will substitute a different font and your design will look wrong — and you may not notice until after you engrave. Before you finalise any design: select all text, then use Edit → Convert to Path (or press Ctrl+Shift+G). The text becomes permanent vector paths that are not dependent on any installed font.
Overscan and power reduction for small text
As the LightBurn community noted, "over burn will make any text hard to read — less is often more." For text below 10 mm, try dropping power by 5–10% below your normal engraving setting for the material. The smaller the letter, the less margin you have before the heat bleeds across the strokes.
Do script and handwriting fonts work for laser engraving?
Yes — at the right sizes and weights. The catch is that the community's experience is limited to bold-weight scripts, not the thin calligraphic styles that look beautiful on paper.
Scripts that work well at 15 mm+ height:
- Pacifico — the most widely used script font in the laser engraving community. Thick, round strokes, generous counters. Free on Google Fonts.
- Lobster Bold — similar thickness to Pacifico, with a slightly more upright, compact style that works well on small gift items.
- Satisfy — slightly thinner than the above, so raise the minimum reliable height to 20 mm.
Below 10 mm, skip all scripts and use a bold sans-serif. The connecting strokes between letters are the first thing to disappear, and once they go, a script reads as disconnected blobs rather than handwriting.
Test your fonts before committing to a project
No guide — including this one — replaces a test burn on your actual material with your actual machine. A quick font test takes two minutes and uses a scrap piece. Here is the procedure:
- In LightBurn, create a text sample block with your chosen font at the exact size you plan to use. Include the smallest text on your design, not just the headline.
- Use the same power and speed settings as your actual engrave job.
- Burn the test on a corner of your material (or a matching scrap).
- Check the result at arm's length — not with your nose to the engraving. Text looks fine up close from the workbench but can be unreadable at a normal viewing distance.
- If strokes are burning together or letters are filling in: increase speed by 20%, or reduce power by 5–10%, or switch to a bolder font weight.
Our free Material Test Grid Generator helps you dial in settings systematically — it generates a labelled SVG with a grid of power and speed combinations so you can find the sweet spot for your material in a single burn session.
For reliable laser engraving at 5 mm text height, minimum stroke width is 0.3 mm — satisfied by bold or black-weight sans-serif fonts like Arial Black, Verdana Bold, and Tahoma.
Gear for engraving personalised gifts
Text engraving on basswood and slate is where most hobbyists start. A few items that make the process smoother:
- Basswood sheets for engraving — the community standard for text and monogram projects
- Blank slate coasters — natural contrast, no coating needed, great for gifts
- OD7+ 450 nm safety glasses — required whenever the laser is running
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Related guides
- Raster vs Vector laser engraving — Fill and Line mode explained in depth
- DPI settings for laser engraving — how scan line density affects fine detail and text
- Photo engraving guide — dithering modes for continuous-tone images
- Preventing burn marks and scorching
- Basswood engraving settings — the most common material for engraved gifts
- Slate engraving settings — high-contrast, no-coating-needed material
- Material Test Grid Generator — find the right settings for your machine and material