DithX - Free Laser Engraving Website & Image Processing Tool

Why is DithX Free

DithX is free because we want every maker, hobbyist, and small business to have access to high-quality laser engraving image preparation tools. All processing happens locally in your browser, ensuring full privacy while you convert photos for laser engraving, apply dithering algorithms, or optimize grayscale images for CNC laser machines.

The platform is supported by Opt Lasers, a leading European engineering company known for precision CNC laser heads. Their sponsorship allows us to keep the core tools open, fast, and accessible without subscriptions or paywalls.

Optional community support helps the project grow, but is never required. DithX remains a non-profit style project focused on education, accuracy, and professional-grade laser engraving output.

Algorithms

Algorithms Overview

27 professionally engineered dithering algorithms, each designed to create a different texture, contrast style, and engraving character. Whether you want smooth gradients, sharp detail, or a retro pixel‑style pattern, every algorithm is optimized for laser engraving accuracy.

How the Algorithms Work

Each algorithm converts your image into a high‑precision black‑and‑white pattern. This ensures consistent engraving results across different CNC laser machines, materials, and power levels. You can choose between:

• Error Diffusion algorithms — natural, detailed, high‑contrast
• Ordered Dithering — clean, structured, retro‑style patterns
• Blue Noise algorithms — smooth, organic grain with minimal artifacts
• Adaptive methods — smart balancing for complex photos

Recommended Starting Points

For most photos, we recommend:

• Floyd‑Steinberg — fast, balanced, excellent for portraits
• Atkinson — softer, smoother, great for wood engraving
• Stucki or Jarvis — maximum detail for metal or acrylic
• Sierra — beautiful gradients with minimal banding

Why 27 Algorithms?

Different materials react differently to laser energy. By offering a wide range of algorithms, DithX ensures:

• consistent engraving quality
• predictable results
• flexibility for every machine and material
• professional‑grade output without trial‑and‑error

DithX Process

The DithX Process is a complete, professional workflow that transforms any photo into a precise, laser‑ready engraving. Every step is engineered to deliver consistent results across all CNC laser machines, materials, and power levels.

1. Preparation

Start with a clean, high‑quality source image. Remove backgrounds, crop with intention, and match your aspect ratio to the material. Proper preparation prevents distortion, noise, and unwanted burn patterns during engraving.

2. Enhancement

Optimize the tonal structure of your image before processing. Adjust gamma, sharpen details, add overlays when needed, and calibrate your resolution to match your laser’s spot size. These steps ensure depth, clarity, and balanced contrast in the final engraving.

3. Dithering

Choose from 27 advanced dithering algorithms, each producing a unique engraving texture. From natural error‑diffusion to structured patterns and smooth blue‑noise grain, DithX gives you full control over detail, contrast, and engraving style.

4. Output

Export your final 1‑bit map, generate contours for cutting, slice large projects into tiles, and verify machine settings before engraving. This ensures clean dot separation, accurate alignment, and professional‑grade results on any material.

Gallery — Community Creations

What This Gallery Shows

The DithX Community Gallery presents real laser‑engraved projects created by makers from around the world. Every engraving displayed here is processed with DithX and includes the exact technical settings used by the creator. This makes the gallery both inspirational and a reliable reference for anyone looking to improve their engraving results.

Real‑World Materials & Results

The gallery demonstrates how different materials respond to laser engraving, including ceramic tiles, canvas, aluminum, coated surfaces, and more. Each engraving shows how the selected dithering algorithm, resolution, and power settings influence texture, contrast, and overall detail.

Technical Settings for Every Project

Each project entry includes complete technical information: the creator’s name, the laser module used, the chosen algorithm and DPI, the speed and power settings, the material preparation or paint layers, and the final engraving size. This transparency helps users understand exactly how each result was achieved and how to replicate similar outcomes.

A Growing Community Resource

The DithX Gallery continues to expand as more makers share their work and settings. It serves as a living knowledge base for the community, offering both inspiration and practical data for anyone aiming to achieve consistent, professional‑grade laser engraving results.

Join the DithX Community

Want to share your own engraving results or learn from other makers? Join the official DithX Facebook Community — the central place where users exchange techniques, compare algorithms, and inspire each other with new projects.

DithX Guides — The Complete System Behind Perfect Laser Photo Engraving

The DithX Guides form a structured knowledge system that explains every part of laser photo engraving — from image science and algorithms to optics, materials, and resolution. Each guide focuses on a different pillar of the engraving process, giving users a clear understanding of why settings work and how to achieve consistent, high‑quality results on any laser.

What Is Dithering — The Image Science Behind Laser Photos

This guide introduces the core principle that makes photo engraving possible: converting a full‑tone image into a 1‑bit pattern your laser can reproduce. It explains how optical mixing works, why lasers require dithering, and how different algorithms influence texture, detail, and material behavior.

Users get an overview of all 27 algorithms, organized into:

• Core Diffusion for smooth gradients and general engraving
• Advanced & Organic for natural, non‑repetitive textures
• Patterns & Grids for structured, geometric and technical designs
• The Lab for experimental modes, custom kernels, grayscale power control, gamma handling, and real‑world benchmark settings

This guide helps users choose the right algorithm for every material and engraving style.

Laser Photo Engraving — From Image to Engraving

This guide covers the complete workflow for preparing and engraving photos. It explains how spot size determines usable resolution, how to match DPI to your laser’s physical limits, and how to prepare images with proper sharpening and shadow recovery.

The guide includes:

• Optics: spot size, resolution matching, bloom compensation
• Beginner’s Lab: focus tests, dithering vs grayscale, test patches, lens maintenance
• Material Treatments: Borax for clean, dark wood burns
• The Kenny Hack for aged, rich tones
• Slate inversion and varnish preparation
• TiO₂ coatings for glass and tile (alcohol & water/glue variants)
• Metal marking mixtures for stainless steel and brass

This guide gives users a practical, repeatable method for achieving sharp, consistent engravings across all materials.

DPI, LPI & Line Interval — Understanding Resolution

This guide explains how resolution works in laser engraving and why DPI, LPI, and Line Interval are mathematically linked. It shows how to convert between them, how to avoid blur or banding, and how to match your settings to your laser’s spot size for maximum sharpness.

Users learn:

• The relationship between DPI, LPI, and Line Interval
• The conversion formula for accurate resolution control
• Why matching Line Interval to spot size prevents overburn or gaps
• How resolution affects detail, contrast, and engraving clarity

This guide gives users the technical foundation to set correct resolution values instead of guessing.