.app domain names
HTTPS enforced at the registry level, by design.
Quick answer
.app is a Google-operated extension for mobile and web applications, and it is preloaded in browsers as HSTS — meaning every .app site must be served over HTTPS or it simply will not load. That constraint is the point: it removes insecure connections as a possibility rather than as a policy.
Check a .app nameWhat .app actually signals
- Operated by Google Registry and included in the HSTS preload list at the extension level, so browsers refuse plain HTTP for every .app domain.
- A valid TLS certificate is not optional — the site is unreachable without one, so factor certificate setup into launch rather than treating it as a follow-up.
- Names it unambiguously as an application rather than a marketing site, which is useful when the product and the company have different names.
Registration requirements for .app
Read from the registry data behind our own registration flow, so these are the rules your registration will actually be checked against — not a general description of the extension.
| Requirement | .app |
|---|---|
| Registration term | 1 to 10 years |
| Organization details | Not required — individuals can register |
| Registrant country | No country restriction |
| Nameservers | Optional at registration (up to 13) |
| Internationalised names (IDN) | Supported |
| Transfers | Require an authorization code from the losing registrar |
Registry data last synchronised 2026-08-17 · source: Google
Who .app suits
A good fit for
- Mobile and web applications with a distinct product identity
- Product sites that should never be reachable over plain HTTP
- Companies separating an app domain from their corporate domain
.app domains on the marketplace now
Premium .app names currently listed on Name.ai. Availability changes constantly; this list refreshes hourly.
Frequently asked questions about .app
Yes, and not as a recommendation. The entire extension is on the HSTS preload list built into browsers, so a .app site without a valid TLS certificate will not load at all. Plan for the certificate as part of launch.
Registration is open — there is no requirement to have published an app. Any registrant restrictions that apply to your registration appear in the registration requirements on this page, read live from registry data.