SSR vs SSG vs CSR

SSR, SSG, and CSR define where and when HTML is generated.

SSR

• HTML rendered on the server per request.
• Best for personalization and fast-changing data.
• Good SEO, slower TTFB.

SSG

• HTML generated at build time.
• Best for stable pages like marketing or docs.
• Very fast TTFB, but data is frozen until rebuild/ISR.

CSR

• Server sends minimal HTML + JS; browser renders UI.
• Best for SPAs and private dashboards.
• SEO limited without JS execution; UI waits for JS.

Quick comparison

• SSR: render on server every request.
• SSG: render once at build time.
• CSR: render in the browser.