There’s a way to prepopulate the email address by linking to forum.example.com/signup?email=alice@example.com. Is there a parameter to also pre-populate the username field? I want to prepopulate it with a random username to reduce sign-up friction. Users will still be able to change it before submitting if they want. If there isn’t a built-in way, I’ll write a plugin.

there is an existing topic [image] Populating email field on login page Support Hello, How can I send a login link to my users and make sure the email field is already populated ? Something like www.my-discourse-site.com/login?email=person@gmail.com So that this user gets his email (person@gmail.com) already filled in the login page when they click Thanks

Thanks, I don’t think that other topic is correct, because the feature exists for emails. If you open this URL in an incognito window, it will fill the email but not the username: https://meta.discourse.org/signup?email=user@example.com&username=nova_tsunami_fox_1234

[image] Lilly: there is an existing topic That’s about the login page. The email= parameter does work on the signup page.

I checked. There isn’t any built-in way to do this right now. If you want to give it a try, the relevant flow for the e-mail is this: Rails controller sets cookie → Ember router reads cookie and passes value to Ember controller → Ember component accesses value on Ember controller Could also be worth checking with the team if they’d accept a PR for this, before making it a plugin.

Populating both email and username from URL parameters?

Product Support

Lilly (Lillian ) May 13, 2026, 4:43pm 2

there is an existing topic

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Populating both email and username from URL parameters?

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