3D file formats

glTF accessor byte layout

Check accessor alignment, stride and required bufferView bytes.

Your inputs

Start with an example

Example result

Align matrix column starts to 4 bytes. Span = accessor offset + (count − 1) × stride + final element data bytes.

Three packed FLOAT VEC3 elements require 3×12 = 36 bytes.

This checks layout arithmetic, not an entire asset. Sparse accessors, compression extensions and semantic component-type restrictions are excluded.