Unity

Large WebGL builds slow down first launch, reduce player conversion, and may fail platform size limits.

Build size depends on:

• Unity runtime and generated code

• Assets included in the build: textures, audio, shaders

• Compression: Gzip or Brotli

• how content is delivered (e.g., Addressables)

This guide shows how to reduce the initial build size without changing game logic.

Example: Fast 4G profile in browser DevTools

• No optimization: full game in the initial download

• Addressables only: heavy assets loaded on demand

• Addressables plus this guide: minimal initial package

Same game, different setup: less data before the first interaction and faster startup.