diff --git a/examples/jsm/exporters/GLTFExporter.js b/examples/jsm/exporters/GLTFExporter.js
index f1a9831e72cb18..c995d1b03400d0 100644
--- a/examples/jsm/exporters/GLTFExporter.js
+++ b/examples/jsm/exporters/GLTFExporter.js
@@ -976,7 +976,17 @@ class GLTFWriter {
 
 		}
 
-		const byteLength = getPaddedBufferSize( count * attribute.itemSize * componentSize );
+		let byteStride = attribute.itemSize * componentSize;
+
+		if ( target === WEBGL_CONSTANTS.ARRAY_BUFFER ) {
+
+			// Each element of a vertex attribute MUST be aligned to 4-byte boundaries
+			// inside a bufferView
+			byteStride = Math.ceil( byteStride / 4 ) * 4;
+
+		}
+
+		const byteLength = getPaddedBufferSize( count * byteStride );
 		const dataView = new DataView( new ArrayBuffer( byteLength ) );
 		let offset = 0;
 
@@ -1041,6 +1051,12 @@ class GLTFWriter {
 
 			}
 
+			if ( ( offset % byteStride ) !== 0 ) {
+
+				offset += byteStride - ( offset % byteStride );
+
+			}
+
 		}
 
 		const bufferViewDef = {
@@ -1056,7 +1072,7 @@ class GLTFWriter {
 		if ( target === WEBGL_CONSTANTS.ARRAY_BUFFER ) {
 
 			// Only define byteStride for vertex attributes.
-			bufferViewDef.byteStride = attribute.itemSize * componentSize;
+			bufferViewDef.byteStride = byteStride;
 
 		}