How to Add Guest to a Trello Board Easily 2026

From inside the specific board you want to open up, look to the top-right header for the Share button, next to the row of member avatars. This is deliberately a board-level control rather than a workspace one — clicking Share here only ever affects this board, which is what makes it safe to use for an outside collaborator without touching anything else your team is working on.

Clicking Share opens a dialog with a text field at the top and a permission dropdown next to it. Type the person's exact Trello username or email — Trello will match it to an existing account if they have one — and set the dropdown before you send anything, since it's easier to get the access level right the first time than to fix it after they've already joined. The board members list underneath shows who currently has access, starting with you as the workspace admin.

If you'd rather not type out individual invites, the same dialog has a "Copy link" option below the input field, with text confirming that anyone who has the link can join at whatever permission level you've set. This is the faster option when you're onboarding a few people at once, but it's also the one to be careful with — anyone who gets hold of the link can join, so use Delete link once your collaborators are in if you don't want it staying active.

For a client or reviewer who only needs to see progress, not edit it, set their role to Observer rather than Member before sending the invite. Observers can view cards, comments, and attachments but can't move cards or change details, which is usually exactly the right amount of access for someone outside your team. You can queue up multiple invitees at once in the same field before hitting Share.

Once you've sent the invite, the board members list in the same dialog is your record of who's in and at what level. It's worth checking this list a day or two after a big invite round, especially if you used a shareable link — it's the only place that shows you, at a glance, whether everyone who joined actually has the access level you intended rather than something a link default assigned them.

To adjust or revoke someone's access, click their avatar in the same members list and choose a new permission level or remove them from the board entirely. This only removes them from the one board — it doesn't touch anything else in your workspace, which is the whole point of keeping outside collaborators scoped to board-level sharing instead of full workspace membership in the first place.