Updated August 2026
What is a share code or join code?
A share code (or join code) is a short, human-transmissible code — commonly 4 digits — that grants access to a shared workspace. Entering the code, or scanning its QR equivalent, opens the board directly: no account creation, no email invite, no link-finding.
Share codes work like PINs, which is their strength: they can be spoken aloud in a meeting, written on a whiteboard, texted to a group chat, or printed on a wall. A part-time employee joins the team's board in seconds from a code said once, verbally.
Key points
- Short enough to say out loud, text, or post on a wall.
- Opens the board without an account — critical for seasonal and non-technical staff.
- Often paired with a QR code for scan-to-open.
- Replaces invite flows that require email addresses and signups.
Why frictionless sharing matters
Every account wall loses people. The classic failure: a manager sets up a board, invites five staff by email, two don't click, one can't remember the password, and within a week the manager is back to texting photos of a paper list. Tools that require signup before a teammate can even *view* the plan sabotage exactly the sharing they exist for.
Code-based access removes the wall: the board is open to anyone holding the code, viewers need nothing, and participation at view level is instant. Instaboard implements this as a 4-digit join code alongside link and QR sharing — a shop owner prints the QR for the staff room wall and says the code to new hires.
Codes and security
A 4-digit code is convenient, not cryptographic — it's the right tool for 'everyone on this crew should see this board,' not for confidential documents. Best practice: use codes for operational boards (tasks, schedules, site plans), revoke or rotate the code if it leaks, and put sensitive material on boards shared by named link instead.
Related terms
Try it with your team
Open a board and start planning in seconds — no setup, no signup. Share it with a link, QR code, or 4-digit code when you’re ready.