Using your custom domain with bio pages and smart links

Every link, bio page, and QR code you create on 1smart.link can use any of your verified custom domains instead of the default 1smart.link domain. This gives you full control over how your URLs look, letting you match each link to the right brand, client, or campaign.

This article explains how the domain picker works, how slug uniqueness is handled across domains, and how to manage multiple domains for different use cases.

The domain picker dropdown

Once you have added and verified a custom domain in Dashboard → Domains, it becomes available in a domain picker dropdown across the platform. You will see this dropdown whenever you create or edit a URL in three places:

Location	Where to find the picker
Dashboard → Links	Shown when creating or editing a smart link — select the domain before saving.
Dashboard → QR	Shown when creating or editing a QR code link — select the domain before saving.
Dashboard → Bio Pages	Found inside Page Settings when creating or editing a bio page.

The dropdown always includes:

1smart.link — the default domain, available to all users on every plan.
Your custom domains — up to 5 verified custom domains per account.

Simply choose the domain you want from the dropdown, enter your desired slug (the path after the /), and save. Your branded URL is ready immediately.

Selecting a domain per link

Every link, bio page, and QR code is independently assigned to a domain. There is no account-wide default that forces all your links onto one domain. This means you can have:

A bio page on yourbrand.com/links
A smart link on otherbrand.com/sale
A QR code link on 1smart.link/scan

All three live in the same account, each on a different domain, managed from one dashboard.

Composite slug uniqueness

The platform enforces uniqueness based on the combination of slug and domain — not on the slug alone. This means the same slug can exist on different domains without any conflict.

For example, all three of these URLs can coexist simultaneously:

1smart.link/contact → Bio page A
yourbrand.com/contact → Bio page B
otherbrand.com/contact → Bio page C

Each resolves to its own distinct destination because the system treats (slug, domain_id) as the unique identifier. You only receive a "slug already taken" error if you try to reuse a slug on the same domain.

Managing multiple domains for different brands

You can connect up to 5 custom domains to a single 1smart.link account. This is particularly useful in several scenarios:

Separate brands — If you run more than one brand, assign each brand its own domain so every URL feels native to that brand's identity.
Client work — Agencies managing multiple clients can connect each client's domain and create links under it, all from one dashboard.
Campaign-specific domains — Use a dedicated domain for a specific marketing initiative to keep branding clean and tracking straightforward.
Multi-language or regional sites — Connect subdomains like en.brand.com and es.brand.com to serve region-specific links under the appropriate subdomain.

Changing a domain after creation

You can switch the domain on an existing link or bio page at any time. Open the link or bio page, change the domain in the dropdown, and click Save.

Warning: When you change the domain, the old URL stops working immediately. The new URL starts working immediately. No redirect is created from the old domain to the new one. If you have already shared the old URL in a campaign, email, or on packaging, anyone clicking it will see an error. Plan domain changes carefully, especially mid-campaign.

SSL on custom domains

Every custom domain receives a free, automatically issued SSL certificate. All your URLs — whether on 1smart.link or your own domain — are served over https:// with a valid padlock icon. Certificates renew automatically before they expire, so you never need to manage SSL manually.

Analytics across domains

Click tracking, retargeting pixel firing, and all analytics work identically regardless of which domain a link uses. The dashboard aggregates clicks per link. The domain a link sits on is shown as informational context but does not affect how data is collected or reported.

Whether a visitor clicks yourbrand.com/offer or 1smart.link/offer, the tracking behaviour is the same.

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