Generate Mipmap LOD Chains Generate multiple Level of Detail (LOD) mipmap versions of an image at halved resolutions.

What Is Image LOD Generator?

An LOD (Level of Detail) generator that creates mipmap chains from a source image. Each successive level halves both width and height, creating a pyramid of decreasing resolution. Used in 3D graphics, game development, and web optimization for texture mipmapping. The tool generates up to 10 levels, each properly downsampled with browser interpolation. Download individual levels or all at once.

Why Use Image LOD Generator?

• Automatic mipmap chain generation (half-size each level)
• Up to 10 LOD levels from a single source
• Proper downsampling with browser interpolation
• Download individual levels or batch download all

Common Use Cases

3D Textures

Generate mipmap chains for 3D texture assets.

Game Assets

Create LOD versions for performance optimization.

Responsive Images

Generate multiple resolutions for responsive web design.

Thumbnails

Create consistent thumbnail sizes from high-res originals.

Technical Guide

Starting from the source image dimensions, each LOD level halves both width and height (floor division). The source image is drawn onto canvas at each target size using drawImage, which applies bilinear interpolation for smooth downsampling. Each level is exported as PNG. File names include the level number and dimensions. Generation stops when either dimension reaches 1px or the max level count is hit.

Tips & Best Practices

• 1
  Start with the highest resolution source for best quality
• 2
  LOD 0 is the original, LOD 1 is half-size, etc.
• 3
  Power-of-two source dimensions work best for 3D engines
• 4
  Use for responsive image srcset generation

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Frequently Asked Questions

Q LOD 0?

LOD 0 is the original resolution. LOD 1 is half-size, etc.

Q Max levels?

Up to 10 levels. Generation stops when a dimension reaches 1px.

Q Power of two?

Works with any size, but PoT dimensions are ideal for 3D engines.

Q Quality?

Browser bilinear interpolation provides smooth downsampling.

Q Format?

All levels exported as lossless PNG.

About This Tool

Image LOD Generator is a free online tool by FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration or installation required.