Free Browser Games Where You Raise a Family (No Download)

True "raise a family" sims with depth rarely run purely in-browser without download—complexity demands local storage/CPU. However, these come close:

Browser-Based (HTML5 / WebGL)

• BitLife (Web) — Text life sim. Choose "Family" activities: date, marry, have kids, raise them, manage finances. Free, ad-supported. bitlife.life
• The Sims FreePlay (Web Wrapper) — EA's mobile port; runs in browser via now.gg cloud streaming (free tier, queue). Not native HTML5.
• Virtual Families 3 (Cloud) — now.gg / BlueStacks X — real-time family sim, cloud-streamed.
• Family Farm Seaside / FarmVille 2 (Facebook Gameroom / Web) — Farm + family lineage, but light on "raising."

Mobile (Free, Best Experience)

• BitLife (iOS/Android) — Deepest text-based family generations.
• The Sims Mobile / FreePlay — Real-time 3D, quests, multi-gen.
• Virtual Families 3 — Persistent real-time, adopted kids grow.
• AltLife / LifeSim — BitLife clones.

Downloadable but Lightweight

• The Sims 4 (Base Game Free) — 20 GB download, but full family gameplay (Create A Sim, build, live mode).
• Stardew Valley — 1 GB, marry, have kids (2), they grow to toddler only.
• Kynseed — Generational legacy, aging, death.

If strictly no-download browser: BitLife Web is your best bet. For 3D, use now.gg cloud streaming (free tier, 1080p/60, ads).