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Coding interviews together, in real time

Codex is a real-time collaborative coding pad for practicing technical interviews with someone you trust.

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Your Coding Pad

Your Coding Pad

Shared With Your Partner

Shared With Your Partner

Trusted by 437+ Devs Hired at Top Companies

eval-rpn.js
YP
Live
1function evalRPN(tokens) { // LeetCode 150
2 const st = []
3 const ops = {
4 "+": (a, b) => a + b, "-": (a, b) => a - b,
5 "*": (a, b) => a * b, "/": (a, b) => (a / b) | 0,
6 }
7 for (const t of tokens) {
8 if (t in ops) {
9 const b = st.pop(), a = st.pop()Priya
10 st.push(ops[t](a, b))
11 } else st.push(+t)
12 }
13 return st.pop()You
14}

Every keystroke, cursor, and message syncs instantly between you and your teammate.

Demonstration

This video will show you how Codex Interview works in action. You can also try it out yourself by downloading the app and running it on your machine.

A real teammate, not a guessing AI

AI copilots hallucinate and fall apart on the hard questions. Codex is the human coding interview assistant: a trusted teammate joins your session through a shared coding pad and feeds you correct, real-time answers — no AI guesswork. Just install the desktop app and invite whoever you trust before you start.

How it works?

Which platforms does Codex Interview support?

Codex Interview runs as a separate desktop app alongside your call, so it works reliably across these browser-based meeting platforms. Below is an up-to-date list of platforms where Codex Interview performs reliably. We recommend running through our basic checks before your actual interview to make sure everything works.

Codex Interview works with Zoom. Make sure you've completed our screen sharing setup so your pad stays visible on the call.
We've thoroughly tested this and can confirm it works perfectly as long as you pass these basic checks first. Curious how the collaboration works under the hood? Check out our behind-the-scenes explanation - we've laid out everything in detail.
We've thoroughly tested this and can confirm it works perfectly as long as you pass these basic checks first. Curious how the collaboration works under the hood? Check out our behind-the-scenes explanation - we've laid out everything in detail.
We've thoroughly tested this and can confirm it works perfectly as long as you pass these basic checks first. Curious how the collaboration works under the hood? Check out our behind-the-scenes explanation - we've laid out everything in detail.
We've thoroughly tested this and can confirm it works perfectly as long as you pass these basic checks first. Curious how the collaboration works under the hood? Check out our behind-the-scenes explanation - we've laid out everything in detail.
We've thoroughly tested this and can confirm it works perfectly as long as you pass these basic checks first. Curious how the collaboration works under the hood? Check out our behind-the-scenes explanation - we've laid out everything in detail.
We've thoroughly tested this and can confirm it works perfectly as long as you pass these basic checks first. Curious how the collaboration works under the hood? Check out our behind-the-scenes explanation - we've laid out everything in detail.
Heads up! The latest Chime desktop app isn't playing nice with our tool right now. Your best bet is to ask your interviewer for a browser link instead - that way you'll get the full experience. If you have to use the desktop app, we can't guarantee everything will work as expected.
We've thoroughly tested this and can confirm it works perfectly as long as you pass these basic checks first. Curious how the collaboration works under the hood? Check out our behind-the-scenes explanation - we've laid out everything in detail.

Command Palette

Use the command palette to quickly access all of Codex's features.

Hide/Show Window

Hide or show Codex Interview

+

Move Window

move the window around your screen without touching the mouse

+

Refresh Window

Refresh the Codex Interview application

+

Quit the Application

Quit the Codex Interview application

+

Find a plan

One-time passes · No subscription · No auto-renewal

Free

Unlimited local pads

  • Unlimited coding pads
  • Multi-language syntax highlighting
  • Code execution
$0
free forever
Get started

Day Pass

24-hour session pass

  • Real-time collaboration
  • Everything in Free
  • Live help from a trusted teammate
  • Screen sharing
  • History and persistence
  • 24/7 customer support
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$29
one-time · 24-hour access
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Codex Enterprise

For large teams

Boost productivity with our Business and Enterprise⁠ plans.
Unlimited pads and fully access to your database, workspace and infrastructure.
Enterprise-grade security, admin controls, SAML SSO, and compliance with GDPR and CCPA.
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Frequently Asked Questions

Here are some common questions about Codex Interview.

Yes, Codex Interview is free to try it out, feel free to download and use it. Each user can create two rooms for free, and you can invite your friends to join the room during 6 hour sessions. If you want to create more rooms, you can subscribe to our pro plan.
Codex Interview currently supports a wide range of programming languages, including JavaScript, Python, Java, C++ and Go. You can find the full list of supported languages in the documentation.
Codex Interview creates a real-time collaborative coding pad. A trusted teammate joins your Codex pad from anywhere and helps you through each problem live—real human answers, no AI guesswork.
Yes—Codex Interview is built with security in mind. All data is encrypted both in transit and at rest, and we enforce strict access controls so that only people you explicitly invite can view or join your workspace.
If you have any questions or need help, you can reach out to our support form in the dashboard. We also have a community forum where you can ask questions and get help from other users.
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Take the short way.

Download and use Codex Interview today!

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