Base44 Custom Domain, Deployment and SEO Basics

A Base44 app lives on a Base44 subdomain by default. That is fine for testing, but customers, app store reviewers and search engines take a product more seriously on its own domain. This guide covers the domain setup itself, the DNS records that usually cause trouble, and the SEO reality of an AI-built single-page app.

Before you touch DNS: three decisions

Most domain problems are planning problems. Decide these three things first, because changing them later means redirects, re-verification and lost sessions.

1. Root domain or subdomain? Using app.yourbrand.com for the Base44 app and keeping yourbrand.com for a marketing site is the cleanest setup. You keep full control over the homepage, email records stay untouched, and you can move the app later without breaking the brand domain.
2. Which plan? As of late 2026, custom domains are tied to paid Base44 plans. Plans and limits change, so confirm in your workspace before promising a launch date.
3. Who owns the registrar account? Register the domain in a company account, not a freelancer's or a single founder's personal login. You will need that access again for SSL renewals, email records and any later migration.

Connecting the domain step by step

The exact screens in Base44 evolve, but the sequence is the same as for any hosted app builder:

1. Publish the app at least once so it has a live production version.
2. Open the app's settings and find the domain section. Enter the domain or subdomain exactly as you want visitors to type it.
3. Copy the DNS records Base44 displays. Do not reuse records from a tutorial; the target values are specific to the platform and can change.
4. Log in to your registrar or DNS provider (Cloudflare, your hosting company, the registrar itself) and create those records.
5. Wait for verification. DNS changes often propagate within minutes, but allow up to 24–48 hours before you assume something is broken.
6. Confirm that HTTPS works without warnings and that the old Base44 URL either redirects or is no longer shared publicly.

Which DNS record does what

If you use Cloudflare, start with the proxy (orange cloud) disabled for the app record until verification and SSL have succeeded. A proxy in front of a platform that issues its own certificate is a frequent cause of redirect loops.

Deployment hygiene for a hosted builder

With Base44 you do not run servers, but you still deploy. The risk shifts from infrastructure to process: one prompt can change a data schema that live users depend on. A few habits prevent most incidents.

• Separate testing from production. Keep a duplicate app or a clearly separated test environment for experiments, and only publish changes you have clicked through yourself.
• Write down every published change. A short changelog ("added invoice export, changed customer entity") makes it far easier to explain a bug report later.
• Check authentication on the live domain. Login redirects, magic links and OAuth providers often have allowed-URL lists. After switching domains, test sign-up, login, password reset and logout again.
• Review data access rules. AI-generated apps sometimes expose records to every logged-in user. Test with two accounts that should not see each other's data.
• Know your exit. Understand what you can export before you depend on the app; we cover this in Base44 vendor lock-in and code export.

The SEO reality of a Base44 app

A Base44 front end is a JavaScript single-page application. The server sends a thin HTML shell, and the content appears after the browser executes the scripts. That has concrete consequences:

• Google can render JavaScript, but it does so in a second wave and with limited resources. Rankings for content-heavy pages are usually weaker than for server-rendered equivalents.
• Many other crawlers, including several bots used by AI answer engines, fetch HTML without executing JavaScript. To them, your app can look nearly empty.
• Per-page titles, meta descriptions and structured data are only reliable if the platform lets you set them in the served HTML. Check what your plan exposes rather than assuming.

Our recommendation is a split architecture: a static or server-rendered marketing site on the root domain (pricing, features, blog, documentation, legal pages) and the Base44 app on a subdomain for everything behind login. Search engines index the marketing site; users get the app. This also keeps you independent of a single builder for your most valuable SEO asset.

SEO launch checklist

• Marketing pages are server-rendered or static and contain the text you want to rank for.
• The app subdomain is not competing with the marketing site for the same keywords.
• Internal app pages that should not appear in search (dashboards, settings) are excluded or require login.
• Both properties are verified in Google Search Console, and a sitemap exists for the marketing site.
• Legal pages – imprint, privacy policy, terms – are reachable without logging in.

When the hosted setup is no longer enough

A custom domain makes a Base44 app look like a product. It does not change the underlying limits: hosting, database and performance remain the platform's. Signs that you have outgrown the hosted setup include a need for server-side rendering on many pages, strict data-residency requirements from enterprise or public-sector customers, or traffic patterns you cannot control. At that point you either harden what you have or move to a codebase you fully own; the trade-offs are covered in scaling a Base44 app beyond the prototype and the broader Base44 production readiness checklist.

If a migration or a parallel custom build is on the table, an experienced build partner such as OnlineAppCreator can rebuild critical parts on infrastructure you control while the Base44 app keeps serving users. Before launch, a structured outside look at onboarding and navigation, for example through UXreviewer.io, often catches the issues your own testing misses. For comparison, the equivalent process on another builder is described in deploying a Lovable app to production.