CodingBat

CodingBat is ranked #7 of 27 in coding challenge sites on The Geeks Club. It runs on Web. There is a free plan.

CodingBat plans and pricing

Free Free Java and Python coding problems · browser-based practice · account optional codingbat.com · 1 Oct 2026

Compared on coding challenge sites

Free plan: Yes
Primary use: practice
Languages supported: Java, Python
Solution explanations: Yes
Custom challenges: Yes

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CodingBat

Purpose: CodingBat is a free site of live coding problems for building Java and Python coding skill.
Feedback: Users type code into a browser text area and click Go to save, compile, run, and see results immediately.
Installation: The site is designed with nothing to install and works in the browser.
Use cases: CodingBat says its problems work for homework, self-study, labs, and live lecture examples.
Problem progression: Problems in each section become harder toward the end of the section.
Hints and solutions: Some problems provide hints or solution code, and all Warmup sections have solution code available.
Accounts: Accounts save code and checkmarks, while unauthenticated work is forgotten after a session ends following two hours without activity.
Progress tracking: Each account has a done page listing completed problems, and CodingBat provides progress graphs and code badges.
Teacher sharing: Accounts can share information with a teacher account, whose report lists students and their completed-problem counts.
Custom content: Users can create custom pages and custom Java or Python problems with CodingBat's authoring feature.
Privacy: CodingBat says it does not send marketing email, sell contact information for marketing, or publicly identify users.
Data use: CodingBat collects regular web-server logs and may use submitted code and data for research into teaching technology.
Cookies: CodingBat uses cookies to maintain login sessions and says it does not use third-party cookies.
Support: The site asks users to email [email protected] with bug reports or suggestions.
Price from: Free

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Where it ranks on The Geeks Club

Best Coding Challenge Sites in 2026#7 of 27

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Sources

codingbat.com/about.html· checked 1 Oct 2026
codingbat.com/help.html· checked 1 Oct 2026
codingbat.com/authoring.html· checked 1 Oct 2026
codingbat.com/privacy.html· checked 1 Oct 2026