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Your Mortar web address

The free address ends in .mortar.site. Change it under Settings → Domain. It saves as you type.

Updated 1 November 2026

Every site has a free address that ends in .mortar.site. It is the address the site uses until you connect a domain you own.

Steps

  1. Open Settings, then Domain. The card is Site address. The line under the title is "Your free address, used until you connect your own domain."
  2. The field is labelled Site address, with .mortar.site after it. Type the name you want. Spaces become hyphens, and capitals become lowercase.
  3. Wait for Available — saving…, then This is your site address. There is no separate Save button.
  4. If the business name can make a shorter address, a link offers Use “name.mortar.site”. Press it to fill the field with that name.

The same Site address field is in the website editor. It follows the same rules.

Before you type, the line under the field says: "Choose the address your site will use until you connect your own domain." While it checks, the line is Checking….

Connecting a domain you already own is a separate step, and it waits until the site is on a paid plan. See connect your own domain.

If it doesn't work

That address is already taken. and That address is reserved. mean you need a different name.

Use 1–63 lowercase letters, numbers or hyphens, not starting or ending with a hyphen. is the rule for a name Mortar will not accept. The field stops at 63 characters.

Common questions

Is there a Save button?

No. The Site address field saves as you type. Available — saving… means it is saving. This is your site address. means it is set.

Does this stay if I add my own domain?

The Domain page says the free address is used until you connect your own domain, and that the free address above always works.

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