No signup for guests
Share a link and your candidate is drawing in seconds. No account, no friction.
Technical interviews
Draw it. Explain it. Get the offer.
The collaborative whiteboard built for remote technical interviews: infinite canvas, live cursors, and a link your candidate can join with zero signup.
No install · No signup for guests · Export to PNG, JPG, PDF
Real time, together
Live cursors and presence make the canvas feel like a whiteboard in the same room.
Nothing to install
Runs in the browser during your call. Export anytime to PNG, JPG or PDF.
Which interviews it fits
Diagraw is the visual half of the interview
It doesn't run code or grade solutions; it shines when you need to reason together with a diagram.
System design interviews
the flagship use case
Architecture, load balancers, queues and caches, live on a dedicated system design whiteboard.
Architecture discussions
trade-offs, out loud
Walk through a technical decision or a C4 diagram while you both edit the same canvas.
Explaining a solution
no ambiguity left
Sketch the approach, a data flow, or a take-home schema so it reads clearly.
Pair practice sessions
rehearse the real thing
Rehearse rounds with a partner, save versions, and watch your sketch evolve.
Why it works remotely
Real-time collaboration with live cursors and presence for every participant.
Share by link and the guest joins without creating an account.
Infinite canvas with a hand-drawn feel, built for frictionless sketching.
Architecture shapes and arrows that snap as you move nodes.
Version history and export to PNG, JPG or PDF for feedback.
Frequently asked questions
Is it free, and do I need an account?
Yes, it's free. Joining a session and drawing need no account and nothing to install, so your candidate is in with a single link. A free account is only for keeping your own diagrams, since your library and version history sync once you're signed in.
How does my candidate join?
Share the session link or its QR code. They enter a name and start drawing in seconds, with no signup and nothing to install. It runs right in the browser during your video call.
Does it run code, like a coding interview tool?
No. Diagraw is the visual half of the interview: designing, connecting and explaining on a whiteboard. It doesn't execute code or grade solutions, so it's built for system design, architecture and any round where a diagram does the talking.
Is it really real-time, and how many people can join?
Real collaboration over a live connection: everyone sees each other's cursors, presence and edits as they happen, and the host can present a view for others to follow. A session holds far more people than an interview needs, so 1:1s and panels both work.
What can I export or reuse afterwards?
Export the board as PNG, JPG or PDF for feedback, or as a Diagraw file to reopen later. You can also export the diagram as Mermaid or Docker Compose code, and import the same formats, or a Miro board, to start from something you already have.
Does the live link expire, and could I lose my diagram?
Live session links expire automatically after a while, and the host can end the session at any time. Either way your diagram stays on your canvas, so nothing is lost. Signed-in hosts also keep it in their library with full version history.
How are my account and data handled?
Sign in with Google, GitHub or email, with optional two-factor authentication. Passwords are stored hashed with Argon2id, never in plain text, and you can export or delete your account and diagrams whenever you want.
Can I prepare before the interview?
Yes. Practice rounds solo or with a partner, save named versions as your design evolves, and reopen or duplicate a sketch when the real interview comes.
Get ready for your next technical interview
Whiteboard speed, with what a remote team needs: live collaboration, history and share-by-link, free.