Workspace URLs, invite links and which to encode
Slack identifies workspaces, not people, by subdomain: yourteam.slack.com. That's what this page encodes, and it's the right destination when the audience already has an account or will be invited through the normal flow — new hires, contractors, a partner team.
For open communities, an invite link is usually what you want instead. Those are long, contain a random token, and can be revoked or expire, so paste them through "Any link" and treat printed copies as disposable. A workspace URL, by contrast, stays valid for as long as the workspace exists.
The practical placements are onboarding sheets, desk cards for a new starter, conference stands for community Slacks, and laminated signs in shared spaces. All of them beat writing a subdomain someone has to spell back to you.
Everything happens in your browser. The QR encoder is built into this page, so your username is never sent to a server, nothing is logged, and there's no daily limit. The code is static — the link lives in the pattern itself, with no redirect service in the middle that can expire, start charging or go down.