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Best Productivity ResourcesBy Shushant LakhyaniVerified creator

Web App

Python Tutor

Watch your code run line by line with a free visual debugger.

Visit Python Tutor4.6

  • Rating

    4.6 / 5

  • Pricing

    Free

  • Difficulty

    Beginner

  • Works on

    Web

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Free: 1,100+ ways people make money onlineFree: 399+ ways to make money online

What is Python Tutor?

Python Tutor shows exactly what happens in memory as your program runs, with frames, objects and pointers drawn step by step. It supports Python, Java, C, C++ and JavaScript, runs in the browser and is free to use, which makes it popular in classrooms around the world.

Pros: what Python Tutor does well

  • Makes pointers and references visible
  • Five languages supported
  • Nothing to install

Cons: where it falls short

  • Only suited to small programs
  • Dated look

Who Python Tutor is for

Beginners and teachers who want to see what code really does.

Who can skip it

Experienced developers debugging large real-world projects.

Python Tutor alternatives

Not sold on Python Tutor? These do a similar job, and each card says what it has in common.

All Learning resources

JupyterLab

Focus: notebooks, data science and interactive. Shares python with Python Tutor. Adds macOS, Windows and Linux. Rated 4.7 (Python Tutor: 4.6).

Web AppFreeWeb, macOS
4.7Visit

VisuAlgo

Focus: algorithms, data structures and computer science. Shares visualisation with Python Tutor. Rated 4.7 (Python Tutor: 4.6).

Web AppFreeWeb
4.7Visit

marimo

Focus: notebook, data and interactive. Shares python with Python Tutor. Adds macOS, Windows and Linux. Same 4.6 rating.

Web AppFreeWeb, macOS
4.6Visit

fast.ai

Focus: deep learning, machine learning and course. Shares python with Python Tutor. A course, not a web app. Rated 4.8 (Python Tutor: 4.6).

CourseFreeWeb
4.8Visit

FinAI Research

Focus: finance, economics and research. Shares python with Python Tutor. An AI tool, not a web app. Adds macOS, Windows and Linux. Rated 4.2 (Python Tutor: 4.6).

AI ToolFreemacOS, Windows
4.2Visit

Compiler Explorer

Focus: compiler, assembly and c++. Also in Learning and Research, like Python Tutor. Rated 4.8 (Python Tutor: 4.6).

Web AppFreeWeb
4.8Visit

Free alternatives to Python Tutor

Want to spend nothing? These free picks cover similar ground.

Desmos

Focus: graphing calculator, maths and education. Also in Learning and Research, like Python Tutor. Adds iOS and Android. Rated 4.8 (Python Tutor: 4.6).

Web AppFreeWeb, iOS
4.8Visit

DevDocs

Focus: documentation, api reference and developer tools. Also in Learning and Research, like Python Tutor. Adds Offline. Rated 4.7 (Python Tutor: 4.6).

Web AppFreeWeb, Offline
4.7Visit

Ptable

Focus: chemistry, periodic table and science. Also in Learning and Research, like Python Tutor. Rated 4.7 (Python Tutor: 4.6).

Web AppFreeWeb
4.7Visit

Wakamai Fondue

Focus: fonts, opentype and typography. Also in Learning and Research, like Python Tutor. Same 4.6 rating.

Web AppFreeWeb
4.6Visit

Human Atlas

Focus: anatomy, 3d and education. Also in Learning and Research, like Python Tutor. Rated 4.5 (Python Tutor: 4.6).

Web AppFreeWeb
4.5Visit

MeTube

Focus: video download, audio and yt-dlp. Also in Learning and Research, like Python Tutor. Rated 4.5 (Python Tutor: 4.6).

Web AppFreeWeb
4.5Visit
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