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VizLearn
Understand algorithms, AI & CS through hand-drawn animations
VizLearn helps you understand algorithms, AI, and CS through hand-drawn interactive animations. Change the input, scrub the timeline, and watch each concept unfold through synchronized visuals, state, code, and logs. It includes 30 free lessons, from sorting and data structures to MNIST, backpropagation, attention, process scheduling, and TCP.
Hey Product Hunt 👋
I'm Bolt Guo, and VizLearn started as a tool for one very specific person: me, trying to actually understand algorithms.
Every explanation I found was either a wall of text or a static diagram. The few animations out there ran on someone else's data, at someone else's pace — I'd watch a sorting GIF five times and still couldn't answer "okay, but what happens if the array is already sorted?" Because I couldn't try it.
So I built the thing I wished existed: a place where you don't watch an algorithm — you drive it.
In VizLearn, every lesson is a hand-drawn animation, the source code, and an execution log that all move together — frame by frame, line by line. The part I care about most: you change the data and run it on your own input. Swap the array, set your own learning rate, pick a different hash function, then pause, rewind, and step through it while the exact line of code lights up.
What's in it today:
- 30 interactive lessons across Foundations, Algorithms, Data Structures, AI & CS — from execution tracing to backpropagation to the TCP handshake
- Draw a digit and watch a real neural network classify it, live (MNIST)
- Config panels on every lesson, so each one is meant to be poked at, not just watched
- Scrub/step timelines for algorithms, real-time modes for data structures
- An Explain doc beside every animation, 3 UI languages, and no sign-up required
The hand-drawn look is on purpose. It makes the product feel closer to a professor sketching on a whiteboard than a polished black box, which is exactly the feeling that made hard ideas finally click for me.
What's next: more graph algorithms, transformer internals, diffusion-model walkthroughs, and deeper systems lessons.
I'd genuinely love to hear what confused you, what felt off, or what you'd want visualized next. There's a feedback button built into every lesson — tell me what to build next.
About VizLearn on Product Hunt
“Understand algorithms, AI & CS through hand-drawn animations”
VizLearn was submitted on Product Hunt and earned 4 upvotes and 1 comments, placing #139 on the daily leaderboard. VizLearn helps you understand algorithms, AI, and CS through hand-drawn interactive animations. Change the input, scrub the timeline, and watch each concept unfold through synchronized visuals, state, code, and logs. It includes 30 free lessons, from sorting and data structures to MNIST, backpropagation, attention, process scheduling, and TCP.
On the analytics side, VizLearn competes within Education, Developer Tools and Artificial Intelligence — topics that collectively have 1.1M followers on Product Hunt. The dashboard above tracks how VizLearn performed against the three products that launched closest to it on the same day.
Who hunted VizLearn?
VizLearn was hunted by Bolt Guo. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of VizLearn including community comment highlights and product details, visit the product overview.
Bolt Guo