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 →
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We built something real.
Here's what it takes to keep it running.

QubitDecoded takes quantum computing from zero to Shor's algorithm — with browser-based simulators, rigorous math, and zero paywalls. Every lesson on this site is free, and we intend to keep it that way. This page explains what it actually costs to build and maintain this, and how you can help if you want to.

41 Free lessons
live now
7 Planned tracks
zero paywalls
0 Ads, accounts,
or guilt timers
Times you can
revisit any lesson

What this actually is

Most quantum computing resources fall into one of two traps: either they're watered-down pop-science that never gets to real math, or they're dense academic papers that assume you already work in the field. QubitDecoded is built to be neither.

Every lesson follows a fixed structure — intuition first, then a conceptual framework, then formal theory, then the full mathematics, then an interactive you can actually play with. The circuit simulator runs a complete state-vector simulation in your browser. The Bloch sphere renderer is built from scratch. Nothing here is a wrapper around a third-party widget.

This is research-quality content made free, and keeping it that way is a deliberate choice — one that costs real time and real money.

Where the money goes

No vague promises. Here is exactly what support funds:

🖥️
Hosting & delivery
Fast, globally distributed asset delivery. The simulator runs in-browser, but serving fonts, scripts, and HTML at speed to users worldwide is a real cost — not a hypothetical one.
⏱️
Lesson development time
Each lesson takes 8–20 hours of writing, sourcing, reviewing, and coding the interactive elements. That time has to come from somewhere. Donations convert directly into more lessons shipped faster.
🔬
Simulator R&D
The circuit simulator, Bloch sphere renderer, and algorithm visualisers were built from scratch — no bought components, no SaaS embeds. Extending them to cover more gates, more algorithms, and more qubits takes dedicated engineering time.
🔒
Independence
QubitDecoded has no venture funding, no advertising partners, and no institutional affiliation. It stays independent because the people who use it choose to support it. That independence is what lets us teach without bias and publish without permission.

How support works

There's no tier that's "too small" and no tier that unlocks special treatment — everything stays free for everyone regardless. Pick whatever feels appropriate for the value you've gotten.

One-time
Small, once
Covers a stretch of hosting costs or a few hours of writing time. If you got something out of a single lesson, this is a proportionate way to acknowledge it.
📐
One-time
Medium, once
Funds a meaningful chunk of development time for a new lesson or simulator feature. This is the level at which your contribution has a visible effect on what ships next.
🔁
Recurring
Any amount, monthly
Predictable income is what lets independent projects plan ahead. Monthly support — even a small amount — is disproportionately useful compared to the same total given once.

Quantum education is the kind of thing that should exist on the internet for free. The physics is not secret. The math is not proprietary. The only reason good courses don't stay free is that building them well costs time, and time costs money.

QubitDecoded exists to fix that. If you agree it should exist, supporting it is a direct vote for the kind of web you want.

— Team QubitDecoded

Secure checkout options — including card and bank transfer — will appear in the section below once our payment backend is live. These buttons scroll directly there.

Checkout & payment details

One-time and recurring payment options will live here — card, bank transfer, and any regional methods we can offer with low fees. We'll keep the process straightforward, send you a receipt, and never reference your contribution again in lessons or prompts.

Until the payment backend is connected, you can reach us directly via the About page if you'd like to contribute now.

Payment integration — coming soon

Other ways to help — genuinely useful ones

If donating isn't the right move right now, these alternatives have a real impact on the project's reach and quality:

No guilt if you leave this page empty-handed. Come back when a lesson genuinely changes how you think about something — that's a better reason to support it than obligation.