Interview whiteboard
A whiteboard your candidate can already use
Send one link. They open it in the browser they already have, type a name and start drawing next to you. No install, no account, no screen share of somebody else's tool.
Works in the call you already booked. Zoom, Meet, Teams — it is a browser tab beside them.
What does my candidate have to install?
Nothing. You send a link, they open it in the browser that is already on the machine, type a name and they are on the board with you. There is no signup, no download and no extension.
That is the part most interview tools get expensive about, and it is the part that matters most: the first three minutes of a round should be about the problem, not about a login form.
Can we both draw at the same time?
Yes. It is a real shared canvas, not a screen share. You both have a cursor, both cursors are visible, and edits from either side appear immediately for the other.
So you can add the box they forgot while they are still explaining the queue, and they can see you do it. That is the interaction a physical whiteboard gives you and a screen share takes away.
Who can see what?
The board is shared. Everything else depends on the link somebody arrived with.
An observer link lets a colleague watch without drawing, and the whole room is told they are there — the candidate included. If you want the private half too, notes and a rubric that never reach the other side, that is the interview mode on the other page.
Is it any good for a coding round?
For the parts that are not typing, yes. Sketching the shape of a solution, walking a data structure, drawing the call graph before writing any of it — that is what a canvas is for.
For running code, use a code editor. We would rather say that than pretend a whiteboard compiles.
What can they actually draw with?
Boxes, arrows that stay attached when you move things, text, freehand, images, and shapes for services, databases, queues and caches. Arrows recompute against the boxes they connect, so moving a component does not leave a diagram in pieces.
It is hand-drawn on purpose. A sketchy line reads as a thought in progress; a crisp one reads as a decision, and half of an interview is thinking out loud.
Does it work on a phone or a tablet?
Yes, and it is worth saying what that means. Touch drawing works, the toolbar collapses to fit, and pinch-to-zoom pans the canvas the way you would expect.
A tablet with a stylus is genuinely nice for this. A phone works but a system design round on a 6-inch screen is a hard afternoon for anyone.
What happens to the diagram afterwards?
Export it as PNG, JPG or PDF, or keep it in your library if you are signed in, with its version history. The person who joined keeps their own copy of what they drew.
If you need more than the picture — scores against a rubric, notes timestamped to the minute, a replay of the order things were built in — that is the interview mode, and it produces a report instead of an image.
What does it cost?
The board is free, including the live session and the link your candidate joins with. Pro is 6 € a month and raises the caps: longer interviews, the full prompt bank, more observers.
The free plan is a real plan. You can run interviews on it this week without giving us a card.
Running the whole round, not just the drawing
If you want the phase clock, a problem you reveal in pieces, a private lane for notes and scores, and a report with the replay, that is a separate mode on top of this board.
See how an interview runsQuick answers
Do I need an account?
Only if you want to keep your boards. Opening a session and drawing on it needs no account at all, on either side of the link.
How many people can be on one board?
A session holds up to a hundred live connections, which is far more than an interview needs. For a class, one board per student is the better shape.
Can I prepare the board before the interview?
Yes. Draw what you want on screen first, then share it. Whatever is on the canvas when you open the session is what the other person sees when they arrive.
Does the link expire?
A free session link expires after seven days. On Pro it does not expire, so a board you use for every interview keeps working.
Can I embed a finished board somewhere?
Yes, in Notion, Confluence or any page that takes an iframe. It renders read-only, with no session behind it.
Where is the data?
On servers in the European Union. Diagraw is an independent product funded by Pro subscriptions, not by advertising.
Open one and send the link
It takes about ten seconds and costs nothing. If the interview is tomorrow, this is enough to be ready for it.
Open a board free