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WebAssembly: A Practical Guide

Learn WebAssembly to develop high-performance applications with near-native performance. Take your programming skills to the next level by learning this cutting-edge web technology.

2 Days

Average time students take to complete this course.

Taught by: Luis Ramirez Jr
Last updated: May 2024

Course overview

This intro to WebAssembly course will teach you how to use WebAssembly to develop high-performance applications with near-native performance. You’ll even learn Rust programming language fundamentals and build an image processing project that you can add to your portfolio and see the power of WASM using Rust.

What you'll learn

  • What is WebAssembly (WASM)?
  • Why you would consider adding WASM to your stack and how to properly integrate WASM into your project
  • Learn how to use WebAssembly to handle CPU-intensive tasks that can't normally be done with vanilla JavaScript
  • Learn fundamentals of the Rust programming language, which is the #1 language used for WebAssembly applications
  • Learn how to configure Webpack for building WebAssembly
  • Explore crates for communicating with the browser's APIs
  • Learn how to process images to apply a variety of effects from grayscaling to cropping
  • Learn the best practices for structuring a project with WebAssembly that can be applied to any JS framework

You might be thinking... what does Rust have to do with WebAssembly?

Well using Rust with WebAssembly is the most common and recommended way to use WebAssembly. And like all of our courses, we only teach you what matters.

The main goal of this course is to help JavaScript developers who aren't used to systems programming.

You will learn what WebAssembly is, why you would consider adding it to your stack, and how to properly integrate it into your project.

You will get to experience what it's like to access a user's hardware to perform intensive tasks (such as image processing) and even develop an image processing project that you can add to your portfolio.

Don't know JavaScript, HTML, or CSS?

No problem. You'll also get access to our Complete Web Developer Bootcamp which the perfect starting point.

Don't know Rust yet?

You’ll learn the basic fundamentals in this course but you can also dive deeper with our full 20+ hour Rust Programming course.

One of the best parts of this course (and all ZTM courses) is that you won't be learning alone.

By enrolling today, you’ll also get to join our exclusive live online community classroom to learn alongside thousands of students, alumni, mentors, TAs and Instructors.

Active. Thriving. Supportive. Helpful. Friendly. Motivating. Essential.

These are just a few of the words students use to describe the ZTM Discord which is also one of the biggest and most active developer communities on Discord.

Most importantly, you will be learning from someone that has actual real-world experience using WebAssembly on real-world projects.

Take your skills to the next level by learning this cutting-edge technology for the web.

When's the best time to get started? Today!

There's never a bad time to learn in-demand skills. But the sooner, the better. So start learning WebAssembly today by joining the ZTM Academy. You'll have a clear roadmap to developing the skills to build your own projects, get hired, and advance your career.

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What you'll build

The best way you learn is by doing. Not just watching endless tutorials. That's why a key part of this course is the real-world project that you'll get to build. Plus it'll look great on your portfolio.

Image Effects

Image Effects

Bring the features of Photoshop directly to your browser! This app uses WebAssembly to process and apply effects to images with a single click.

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Course curriculum

To make sure this course is a good fit for you, you can start learning WebAssembly for free right now by clicking any of the PREVIEW links below.


4 lectures

Byte Sized Learning


Exercise: Meet Your Classmates and Instructor


Course Resources + Code


How-to's: Speed up videos, Downloading videos, Subtitles


WebAssembly: Everything You Need to Know

27 lectures

What is WebAssembly?8:53


Getting Started with Rust6:20


Exploring the Starter Project6:46




Data Types6:47


Debugging with Macros6:51


Control Flow4:36


Match Expressions7:48












Preparing the Project3:37


Installing Webpack3:37


Configuring Webpack10:05


Reading Files8:10


Compiling Rust with Webpack4:49


Importing Web Assembly5:50


Logging Files9:16


Base64 Decoding3:11


Loading an Image from Memory6:20


Grayscaling an Image2:57


Buffering an Image4:22


Encoding an Image5:41


App Deployment4:04


Unlimited Updates


Where To Go From Here?

4 lectures

Become An Alumni


Endorsements On LinkedIn


Learning Guideline


Review This Course!


Meet your instructor

Your WebAssembly instructor (Luis) isn't just an expert with years of real-world professional experience. He has been in your shoes. He makes learning fun. He makes complex topics feel simple. He will motivate you. He will push you. And he will go above and beyond to help you succeed.

Luis Ramirez Jr

Hi, I'm Luis Ramirez Jr!

Luis uses his 10+ years of experience in web application development to teach and guide new students to learn to code, get hired and become successful Software Engineers.


Luis Ramirez Jr

Frontend Developer

Frequently asked questions

Are there any prerequisites for this course?

  • A computer (Windows, Mac, or Linux) with an internet connection
  • Basic HTML, CSS and JavaScript knowledge (which we will teach you here if you don't already have this knowledge)
  • The curiosity to learn all about WebAssembly and its applications

Who is this course for?

Anyone working with web applications! WebAssembly is a new type of code that can be run in modern web browsers.

It's a low-level assembly-like language with a compact binary format that runs with near-native performance.

It provides languages such as C/C++, C# and Rust with a compilation target so that they can run on the web. It is also designed to run alongside JavaScript, allowing both to work together.

Therefore, WebAssembly is something that is useful for both JavaScript Developers as well as Programmers from other languages that want to use their programming language of choice on the web.

Do you provide a certificate of completion?

We definitely do and they are quite nice. You will also be able to add Zero To Mastery Academy to the education section of your LinkedIn profile as well.

Can I use the course projects in my portfolio?

Yes, you’d be crazy not to in our slightly biased opinion! All projects are downloadable and ready to use the minute you join.

Many of our students tell us the projects they built while following along with our courses were what got them interviews and because they built the projects themselves, they could confidently explain and walk through their work during the interview.

You know what that means? Job offer!

Are there subtitles?

Yes! We have high quality subtitles in 11 different languages: English, Spanish, French, German, Dutch, Romanian, Arabic, Hindi, Portuguese, Indonesian, and Japanese.

You can even adjust the text size, color, background and more so that the subtitles are perfect just for you!

Still have more questions about the Academy?

Still have more questions specific to the Academy membership? No problem, we answer some more here.

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