Coding Challenges

Free JavaScript coding challenges

TechBlitz provides free JavaScript coding challenges to help you master your skills. Learn new skills in just 5 minutes a day—anytime, anywhere, on any device. Even learn to code on your phone!

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Free JavaScript coding challenges

TechBlitz transforms learning to code into bite-sized, engaging coding challenges. Master new skills in just 5 minutes a day—anytime, anywhere, on any device. Even learn to code on your phone!

Personalized coding challenges

TechBlitz adapts to your weaknesses. Receive recommendations straight to your inbox, and get instant feedback on your code. Improving your coding skills has never been easier.

Each challenge includes a built-in tech skills assessment to track your progress as you grow from beginner to professional developer. Start your coding journey today with practical exercises that take just 5-10 minutes to complete.

Instant AI Feedback

Don't just code blindly. Generate code reports to track your progress and understand your weaknesses.

Structured Learning Paths

Follow a simple, structured learning path to boost your coding skills. Opt-in to receive daily reminders to complete it!

Interactive Challenges

Practice with hands-on coding challenges that simulate real-world scenarios. Build skills while solving problems that matter.

Personalized Coding Challenges

Receive recommendations straight to your inbox, and get instant feedback on your code. Improving your coding skills has never been easier.

Strengthen your coding skills for
for free

TechBlitz provides you structured coding challenges that are tailored to your weaknesses, ensuring you get the most out of your coding journey.

Other platforms

// this is a challenge to learn JavaScript

function mysteryFunction(arr) {
  let result = [];
  for (let i = 0; i < arr.length; i++) {
    result.push(arr[i] * (Math.random() * 10));
  }
  console.log('Wow, so random:', result);
  return result;
}

function reverseString(str) {
  return str.split('').reverse().join('') + '✨';
}

console.log(mysteryFunction([1, 2, 3]));
console.log(reverseString('TechBlitz'));

techblitz

// this is a challenge to learn JavaScript,
// perfect for beginners

export const fetchLatestData = async () => {
  const response = await fetch('https://api.example.com/data');
  const data = await response.json();

  // transform the data
  const transformedData = data.map(item => ({
    ...item,
    formattedDate: new Date(item.date).toLocaleDateString()
  }));

  return transformedData;
}

fetchLatestData();

Built to build your coding skills

Ensuring you get the most out of your coding journey. From beginner to advanced, we've got you covered.

Set a Goal

Set a goal date to complete this study path. Receive a daily reminder to complete the next question.

Goal Setting

Stay on track with your goals and receive daily reminders encouraging your growth.

AI Coding Assistant

Powerful AI Assistant

Never feel confused with a coding problem again. Ask for help and receive instant feedback.

Structured Learning

Follow a structured learning path and become a better developer.

Hundreds of web development coding challenges

Choose from hundreds of coding challenges to master your skills. From JavaScript to Git, we've got you covered.

Beginner

Free JavaScript coding challenges