Free animated platform teaches data structures with step-by-step visuals, no signup needed

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A developer has launched learningto/pass, a free interactive platform designed to teach classic data structures and algorithms through step-by-step animations rather than static diagrams or rote memorization. The tool covers 16 topics ranging from Big O notation to dynamic programming, with each concept visualized before any code is introduced. Python runs directly in the browser via WebAssembly, requiring no installation and working on most devices including phones and Chromebooks. Practice sections offer interview-style coding challenges with AI feedback that mimics a mock interviewer, providing complexity analysis and progressive hints rather than direct answers. No account is required to start, and progress syncing across devices becomes available upon sign-up.

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