Is static site generation good for SEO?

Yes, it is excellent for SEO. A statically generated page contains complete HTML built at deploy time, so crawlers receive all the content immediately with no rendering delay. It is often the best choice for content that does not change frequently, because it combines full crawlability with the fastest possible response times.

What is the difference between ISR and SSG?

Static site generation builds pages once at deploy time and leaves them unchanged until the next build. Incremental static regeneration uses the same static-file model but refreshes individual pages on a schedule or on demand, so content can update without rebuilding the whole site. Both deliver complete HTML to crawlers and are equivalent for SEO.

Does ISR hurt SEO compared to SSR?

No. Incrementally regenerated pages are served as cached static HTML, so a crawler receives complete content exactly as it would with server rendering. The regeneration happens in the background and does not change what the crawler sees. ISR is a good fit for large catalogues that need occasional freshness without per-request rendering cost.

Should I switch from SSG to SSR to get indexed?

No. A statically generated page already ships complete HTML, so there is no rendering problem for server rendering to fix. Switching only makes the page slower and more expensive to serve. If a static page is not indexing, the cause is something like thin content, weak internal links, or a canonical or robots directive, none of which rendering mode affects.

Can I use SSG, ISR and SSR on the same site?

Yes, and most sites should. Different route types have different needs: static generation suits stable content, incremental regeneration suits large occasionally-updated catalogues, and server rendering suits per-request or personalised data. Mixing them per route is the normal, correct approach rather than forcing one mode across the whole site.

HomeLearnSSR vs SSG vs ISR

SSR vs SSG vs ISR: which is best for SEO?

Short answer

None of them is best for SEO, because all three are equally good. Static generation, incremental regeneration and server-side rendering all deliver complete HTML in the first response, which is the only thing that matters to a crawler. The choice between them is about how fresh the data must be and what you want to spend, not about rankings.

This is one of the most persistent confusions in JavaScript SEO, and it sends teams into pointless re-architecture. People treat SSG, ISR and SSR as a ladder of increasing SEO quality. They are not a ladder at all — for search they are the same rung.

Why all three are identical for SEO

A crawler's first-pass experience is a single question: is the content in the HTML the server returned? For all three of these modes the answer is yes. They differ only in when and where that HTML was produced.

SSG builds the HTML at deploy time

The page is rendered once when you build the site, then served as a plain file. A crawler requesting it gets complete HTML instantly.

ISR builds it at deploy, then refreshes it periodically

Same static file model, but the file is regenerated on a schedule or when triggered. The crawler still receives complete HTML — just a version that updates over time.

SSR builds it fresh on every request

The server renders the page each time it is requested. The crawler receives complete HTML, generated moments earlier.

In every case the content is present before any JavaScript runs. The crawler cannot tell, and does not care, whether the HTML was built two weeks ago at deploy or two milliseconds ago on the server. That is why ranking a page has nothing to do with which of these three produced it.

The real decision: freshness and cost

Once you accept that SEO is off the table, the actual choice becomes clear and much easier. It runs along two axes: how fresh does the data need to be, and how much are you willing to spend to keep it that way?

Static generation is the cheapest and fastest to serve, because there is no rendering at request time at all — just files on a CDN. Its limitation is freshness: the content is frozen at build time until you rebuild. Server rendering is the opposite: always current, because it runs on every request, but the most expensive to operate and the slowest to respond under load. Incremental regeneration sits between them, giving you mostly-static economics with data that refreshes on a window you choose.

The decision table

Mode	How the HTML is made	Data freshness	Cost	Best for
SSG	Built once at deploy. Served as static files.	Whatever was true at build time	Lowest — plain files on a CDN	Content that rarely changes: articles, docs, marketing
ISR	Static, but rebuilt on a schedule or on demand.	Fresh within your revalidation window	Low — mostly cached, rebuilds occasionally	Large catalogues that change sometimes
SSR	Built fresh on the server for every request.	Always current at request time	Highest — renders on every hit	Per-request or personalised data

Notice there is no "SEO" column. If there were, it would read the same for all three rows.

How to choose, quickly

Does the content change more than a few times a day?

If no, static-generate it. Articles, documentation, landing pages and most marketing content should be SSG. It is the fastest, cheapest option and there is no SEO cost.

Is it a large catalogue that changes occasionally?

Use incremental regeneration. Thousands of product or listing pages that update now and then get static economics without rebuilding the whole site on every change.

Does it depend on per-request or personalised data?

Use server rendering. Prices that change by the minute, inventory, anything tied to the specific request or user genuinely needs to render on demand.

Most sites end up mixing all three across different route types, and that is correct — the mistake is forcing one mode everywhere. A blog can be static, the catalogue incremental, and the account area server-rendered, all in the same deployment.

The migration that isn't a fix

A specific and expensive mistake worth naming. Teams sometimes migrate from static generation to server rendering — in Next.js terms, from getStaticProps to getServerSideProps, or by adding force-dynamic — believing it will help a page get indexed.

It will not. A statically generated page already contains complete HTML, so there was never a rendering problem for server rendering to solve. All the migration achieves is making the page slower to serve and more expensive to run. If a static page is not indexing, the cause lies elsewhere — thin content, weak internal linking, a canonical or robots issue — and switching rendering mode leaves that cause untouched.

Confirm your pages actually ship complete HTML

All of this assumes the mode you think you are running is the one actually reaching the crawler. That is worth verifying, because a page configured for static generation can still end up shipping incomplete HTML if it fetches part of its content on the client. Run any URL through the checker to confirm the content is really in the first response.

Confirm a page ships complete HTML

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SSR vs SSG vs ISR FAQ

Neither is better; they are equivalent for SEO. Both deliver complete HTML in the initial response, which is all a crawler needs. Static generation is usually faster to serve and cheaper to run, while server rendering keeps data current on every request. The choice is about freshness and cost, not rankings.