Expora IconExpora

Interactive Algorithm VisualizerBFS, DFS, Dijkstra, DP — See Every StepWatch state, pointers, and decisions update in real time. No more tracing on paper.

Expora is an algorithm visualizer that runs BFS, DFS, Dijkstra, dynamic programming, sorting, and more in the browser. See the exact state at each step—queues, distances, pointers—pause, step forward, and connect what you see to your code. Use a guided reference run or run your own solution and watch the same visuals update in real time.

Demo

The problem with grinding LeetCode

Why developers search for an algorithm visualizer

You need to see execution, not just read code. Static explanations and tracing on paper don't scale.

You read code but can't picture the execution

You understand the idea of BFS or Dijkstra, but when you trace it by hand you get lost. Without seeing the queue, the distances, or the order of visits, the algorithm stays abstract and easy to forget.

Debugging in your head is slow and error-prone

When your solution fails a test case, you step through mentally or add print statements. An algorithm visualizer shows you the exact state at each step so you spot the bug in minutes instead of hours.

Text explanations don't show state

Editorials and tutorials describe "we update the distance" or "we push to the queue," but you never see the table, the queue, or the pointers. Visual execution makes the invariant and the order of operations obvious.

You want one place for graphs, trees, DP, and more

Scattered tools and videos make it hard to build a consistent mental model. Expora gives you one environment: pick an algorithm, run it step by step, then run your own code with the same visuals.

How the algorithm visualizer works

From static code to step-by-step execution you can control and replay.

Without Expora

  • Static code and explanations that hide the "why"
  • Manual tracing on paper when you get stuck
  • Videos you can't pause at the exact step you need
  • No way to see your own code run visually

With Expora

  • Reference visualizers + mental maps that build intuition fast
  • Interactive visual debugging with snapshots and step controls
  • Your code, executed and visualized in real time
  • One place for BFS, DFS, Dijkstra, DP, sorting, and more
Step 1

Pick an algorithm visualizer (e.g. BFS, DFS, Dijkstra) or capture a problem from LeetCode with the Chrome Extension.

Step 2

Run step by step: see state, pointers, queues, and distances update. Pause and inspect any step.

Step 3

Switch to "write your own": run your solution and see the same execution visuals update in real time.

Step 4

Use roadmaps and mental maps to connect what you see to interview patterns and next topics.

The difference between
solving and understanding.

LeetCode trains speed. Expora trains understanding. Our interactive visual debuggers show every step—state, pointers, and decisions—so you build intuition you can reuse across problems. Visual comprehension is 3× faster than reading static code.

From static code to
visual understanding.

Static solutions hide the “why.” Expora makes execution visible: step-by-step traces, live state, and clear transitions between steps. Learn from a reference implementation, then switch to your own code and watch the same visuals update in real time.

Learn with a
visual debugger.

Start with a guided reference run, then implement the solution yourself. Run code, step through micro-steps, and see the exact state changes that make the algorithm work—so you can adapt the pattern in real interviews.

two_sum.ts
Connected
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function twoSum(nums: number[], target: number): number[] {
// Map to store difference -> index
const map = new Map();
 
for (let i = 0; i < nums.length; i++) {
const diff = target - nums[i];
if (map.has(diff)) {
return [map.get(diff), i];
}
map.set(nums[i], i);
}
}
Hash Map Visualization
O(n) TimeO(n) Space

Core capabilities for visual learning

Built for coding interview prep: understand patterns by watching real execution. Learn from reference visualizers, then run your own code and see the same visuals update step‑by‑step.

Interactive expandable mental maps

Expand concepts on demand to build intuition fast. See the core idea, invariants, time/space tradeoffs, and common interview variations—organized as a visual model you can reuse.

Visual learning roadmaps

Follow a structured path across arrays, graphs, DP, and more—with prerequisites and progression. Stop random grinding and build a complete mental model that actually transfers to new questions.

Interactive visual debuggers

Step through algorithms with breakpoints, state snapshots, and timelines. Watch pointers, queues/heaps, distances, and decisions evolve—so you understand how it works, not just what it does.

Write, run, and visualize your solution

Implement in your preferred language, run it in‑browser, and see the execution visuals update in real time. Optional: capture problems from sites like LeetCode to bring them into your learning flow.

Expora vs LeetCode vs NeetCode:
Solve vs Understand

Capability
Expora
LeetCode
NeetCode
Interactive visual debugger (step-by-step execution + state)
Partial
Reference implementation + “write your own” (same visuals)
Algorithm visualizers library (graphs, DP, DS, sorting, etc.)
Interactive mental maps (intuition, invariants, tradeoffs)
Structured learning roadmaps + prerequisites
Partial
Run code in-browser
Learning hub (references, interview tips, getting unstuck)
Partial
Partial
Capture/import problems (optional)
AI generates diagrams from code

Stop memorizing.
Start visualizing.

Don't just solve LeetCode problems blindly. Expora transforms complex algorithms into interactive mental maps and step-by-step animations, making comprehension 3× faster and intuitive.

Learn more

Trusted by engineers and educators

Expora helps people prepare for coding interviews by turning algorithms into interactive visual execution—so understanding is fast, repeatable, and easy to explain.

"The visual debugger makes graph algorithms explainable. I can see every state change and articulate the “why” behind each step—exactly what technical interviews reward."

— Maria· Backend Engineer

"We use Expora to align on shared mental models. Reference visualizers plus step-by-step execution traces reduce back-and-forth and speed up onboarding across the team."

— Alex· Engineering Lead

"State snapshots and step controls turn abstract logic into something reviewable. It’s easier to teach, easier to debug, and easier to document—without relying on long walls of text."

— Sara· Software Engineer

Built for how you learn—and how teams teach

Interview prep, onboarding, and education all share the same bottleneck: understanding execution. Expora makes it visible.

Interview candidates

  • Algorithm visualizers across core patterns
  • Reference runs + “write your own” mode
  • Interactive visual debugging (state + step controls)

Engineering teams

  • Shared mental models for complex logic
  • Faster onboarding with execution visuals
  • Clearer reviews and documentation (less back-and-forth)

Bootcamps & education

  • Teach with interactive visual execution
  • Structured roadmaps + prerequisites
  • Objective assessments using step-by-step traces

Pricing plans to help your learning grow

You have your next interview goal, we have your next plan.

Free

Start learning visually

$0

No cost. No catch.

Up to 3 visualizers

  • Binary Search, Bubble Sort & DFS
  • Step-by-step algorithm animations
  • 1 user
  • Chrome Extension problem capture
  • Basic learning roadmaps
  • 24/7 community support

Pro 6 months

Interview prep in one sprint

$99for 6 months

Billed once. No subscription.

Equivalent to $16.50/mo

Full access for 6 months

  • All algorithm visualizers
  • Interactive mental maps + visual roadmaps
  • Step-by-step animations + code runner (Judge0)
  • Chrome Extension capture
  • Unlimited visualizers
  • API Access
  • Priority access during beta

Pro 12 months

Best value for your timeline

$160for 12 months

Billed once. No subscription.

Equivalent to $13.33/mo

Full access for 12 months

  • ← Everything in Pro 6 months, plus...
  • Everything in Pro 6 months
  • New algorithms added regularly
  • Longest runway for interview prep
  • Early access to new features
  • Priority support
GDPR compliantOne-time payment (no monthly subscription)

Local-first

Your vault is yours. Optional secure sync.

Encryption in transit & at rest

TLS 1.2+ · AES-256 for synced data.

GDPR

Minimal processing and easy export.

FAQ

Algorithm visualizer: common questions

What you can visualize, how it works with your code, and how to get started.

Secure authentication (Clerk) + encrypted transport
Run code online via Judge0 (sandboxed execution)
Direct product support during beta
An algorithm visualizer shows you how an algorithm runs step by step—state, pointers, queues, distances—instead of just the final result. Expora is an interactive algorithm visualizer: you can pause, step forward, and see exactly what changes at each step, so you build intuition instead of memorizing code.

Still unsure?

hello@expora.io

Explore more

Integrations & export formats

Fit into your workflow with integrations and shareable formats. We label what’s available today vs. coming soon.

Available

GitHub

Repos, commits & pull requests

Available

Mermaid

Mermaid diagrams (supported)

Coming soon

JSON

Structured export format

Coming soon

VS Code

Editor workflow

Talk with our team

Still unsure? Reach out at hello@expora.io

Or join the waitlist and we’ll keep you updated on launch and beta access.

Ready to understand algorithms, not just solve them?

Join the whitelist and transform how you learn. Mental maps, roadmaps and animations make comprehension 3× faster.