About
EasyStack is a free, interactive visualizer and guide to the stack data structure, built by Arun Neupane.
What Is EasyStack
EasyStack is a free, interactive stack data structure visualizer. It lets you watch push, pop, and peek operations happen step by step, see how stacks grow and shrink, and understand the LIFO principle through live animation instead of static diagrams.
Beyond the visualizer, EasyStack offers a growing library of comprehensive guides covering stack operations, implementations in many languages, time complexity, the call stack, memory, monotonic stacks, real-world analogies, and interview problems. Everything is free, requires no sign-up, and works offline as a PWA.
Try the stack visualizer | Browse all guides
Who Made It
EasyStack was built by Arun Neupane, a CSIT (Computer Science and Information Technology) student from Parbat, Nepal. He is passionate about data structures, algorithms, and building tools that make foundational computer science concepts approachable for everyone.
You can see his work and connect with him on GitHub or through his personal site. For any questions, feel free to reach out by contacting him.
Why I Built This
I built EasyStack out of a passion for DSA education. Reading about a stack is easy, but truly understanding it requires seeing it move. I wanted a tool that would let anyone, from a first-semester student to a working developer, grasp how a stack behaves by watching it operate in real time.
Too many great DSA resources are either paywalled or awkward to use. EasyStack is my small contribution to making data structure education free, visual, and accessible to anyone with a browser, especially students who can't afford expensive courses.
Start learning with real-world analogies
Technology Stack
EasyStack is built with plain, open web technologies. There are no frameworks, no build steps, and no dependencies to install. The core stack is:
- HTML for structure and content.
- CSS for styling, themes, and responsive layout.
- JavaScript for the interactive visualizer and interactions.
This keeps the site fast, lightweight, and easy to read for anyone learning web development. It also means the source is approachable for students who want to see how a real web application is put together.
Open Source
EasyStack is open source. The full source code is available on GitHub, so anyone can read it, learn from it, or contribute improvements.
If you find a bug, have an idea for a new feature, or want to contribute a guide, you are welcome to open an issue or a pull request on the repository. Projects like this grow best when the community shares knowledge and helps improve the tool for everyone.
Contact
Questions, feedback, or ideas for new guides? The best ways to reach out are through the contact page, email, or the GitHub issues for EasyStack.
Key Takeaway
EasyStack exists to make the stack data structure visual, free, and friendly. It is built with simple web technologies, released as open source, and maintained by Arun Neupane from Nepal. If you find it useful, consider sharing it with a friend who is learning DSA.