# .app domain name checker

.app is a generic TLD run by Google Registry, aimed at web and mobile apps. It tells people what you make before they click.

Check a name: open https://availablewhois.com/?q=yourname.app (replace `yourname`).

## .app at a glance

- **Type**: Generic TLD (gTLD)
- **Best for**: Web and mobile apps
- **How we check**: Registry RDAP. ICANN requires generic TLD registries to publish registration data, so answers come from the source.

## Worth knowing

- Like .dev, the whole TLD is HSTS-preloaded: browsers only load .app sites over HTTPS.
- Generic TLD, so availability comes straight from the registry over RDAP.
- Works well for app landing pages and download links, even if your company site is on .com.

## Related TLDs

[`.dev`](https://availablewhois.com/tlds/dev.md) · [`.ai`](https://availablewhois.com/tlds/ai.md) · [`.io`](https://availablewhois.com/tlds/io.md) · [`.so`](https://availablewhois.com/tlds/so.md)

Compare them all in the [TLD guide](https://availablewhois.com/tlds.md), or try a [domain hack](https://availablewhois.com/domain-hacks.md) that ends in `.app`.

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Canonical page: https://availablewhois.com/tlds/app · Check a domain: https://availablewhois.com/ · All docs: https://availablewhois.com/llms.txt