Home Tracks — overview Track 1 — Quantum Basics Track 2 — Mathematics for Quantum Quantum Lab — overview Circuit simulator (fullscreen) Simulators — overview Demos: superposition, interference, entanglement About — overview Approach & philosophy How we teach Support — overview Donate (payments) Other ways to help Start Track 1 — Free →

Quantum computing
decoded.

Most explanations start with equations.
We start with the feeling — then build up to the math. No prerequisites. No paywalls.

drag to rotate
|ψ⟩ = α|0⟩ + β|1⟩
P(0) = |α|²
P(1) = |β|²
|α|² + |β|² = 1
|ψ⟩ = 1.00|0⟩ + 0.00·e|1⟩
drag to rotate · every point is a distinct qubit state

Built because the
existing explanations
weren't working.

Quantum computing has a reputation. Impenetrable notation. Equations before intuition. Courses that assume you already have a physics degree.

QubitDecoded takes a different path. Every lesson starts with a feeling, a visual, or a question — and works up to the formalism only when the ground is ready. You'll build intuition that actually sticks.

No ads. No subscription. No email required. Just the course.

41 free lessons live
across 2 learning tracks
0 prerequisites,
start right now
interactive
simulations

Two paths. One destination.

Track 1 27 lessons · ~10 hrs

Quantum Basics

Start with the feeling. What is a qubit, really? Why does superposition make sense? What does entanglement actually mean for information? No math degree required.

Begin Track 1
  • Why Quantum? The Problem with Classical
  • Meet the Qubit
  • Superposition: More Than Coin Flips
  • Entanglement & Nonlocality
  • Quantum Interference
  • + 22 more lessons
Track 2 14 lessons live · roadmap grows

Math for Quantum

Complex numbers. Linear algebra. Bra-ket notation. Tensor products. The mathematics of quantum mechanics, taught the way it should have been the first time.

Begin Track 2
  • The Mindset Bridge
  • Complex Numbers from Scratch
  • Vectors & the State Space
  • Matrices as Quantum Gates
  • Dirac Notation Mastery
  • + 9 more lessons

Don't read.
Experiment.

Every abstract concept in quantum mechanics has a corresponding interactive simulation. Drag the Bloch sphere. Build a circuit. Watch probability amplitudes collapse in real time.

  • L04 Interactive Qubit Lesson
  • Quantum Circuit Builder
  • Interference Pattern Simulator
  • Phase Kickback Visualizer
  • Grover's Oracle Step-Through

Standalone
practicals.

The Simulators page gathers lesson-sized demos. Quantum Lab is different: open-ended tools you launch when you want to build freely, inspect full state vectors, and connect results back to the tracks.

Today there is one live lab — the full-screen quantum circuit simulator — with more practicals planned as the curriculum grows.

Live now

Quantum circuit simulator

  • Multi-qubit grid, drag-and-drop gates, run in the browser
  • State vector, Bloch view, histogram, Qiskit-style export
  • No install, no account — same spirit as the rest of the site
Launch simulator