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CodingBat

codingbat.com

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Spec score 7.6 #17 of 30 in Coding Challenge Platforms

What it is

CodingBat is a free browser-based site for practicing Java and Python through live coding problems. Users enter code in a text area and click Go to save, compile, run it, and see the result immediately; nothing needs to be installed. Problems in each section become harder toward the end, and some include hints or solution code. Every Warmup section has solution code available. The exercises are intended for homework, self-study, labs, and live lecture examples. An account saves code and completion checkmarks, lists completed problems, and provides progress graphs and code badges. Accounts can share information with a teacher account, whose report lists students and their completed-problem counts. Without an account, work is forgotten after a session ends following two hours without activity. Users can also create custom pages and author Java or Python problems. CodingBat says cookies maintain login sessions and that it does not use third-party cookies. It collects regular web-server logs and may use submitted code and data for teaching-technology research.

Spec sheet

Purpose
CodingBat is a free site of live coding problems for building Java and Python coding skill.Read 1 Oct 2026 · codingbat.com
Privacy
CodingBat says it does not send marketing email, sell contact information for marketing, or publicly identify users.Read 1 Oct 2026 · codingbat.com
Support
The site asks users to email [email protected] with bug reports or suggestions.Read 1 Oct 2026 · codingbat.com
Accounts
Accounts save code and checkmarks, while unauthenticated work is forgotten after a session ends following two hours without activity.Read 1 Oct 2026 · codingbat.com
Cookies
CodingBat uses cookies to maintain login sessions and says it does not use third-party cookies.Read 1 Oct 2026 · codingbat.com
Custom content
Users can create custom pages and custom Java or Python problems with CodingBat's authoring feature.Read 1 Oct 2026 · codingbat.com
Data use
CodingBat collects regular web-server logs and may use submitted code and data for research into teaching technology.Read 1 Oct 2026 · codingbat.com
Feedback
Users type code into a browser text area and click Go to save, compile, run, and see results immediately.Read 1 Oct 2026 · codingbat.com
Hints and solutions
Some problems provide hints or solution code, and all Warmup sections have solution code available.Read 1 Oct 2026 · codingbat.com
Installation
The site is designed with nothing to install and works in the browser.Read 1 Oct 2026 · codingbat.com
Problem progression
Problems in each section become harder toward the end of the section.Read 1 Oct 2026 · codingbat.com
Progress tracking
Each account has a done page listing completed problems, and CodingBat provides progress graphs and code badges.Read 1 Oct 2026 · codingbat.com
Teacher sharing
Accounts can share information with a teacher account, whose report lists students and their completed-problem counts.Read 1 Oct 2026 · codingbat.com
Use cases
CodingBat says its problems work for homework, self-study, labs, and live lecture examples.Read 1 Oct 2026 · codingbat.com

Plans and prices

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

Every CodingBat plan and price →

Strong points and limits

Strong points

  • Free Java and Python coding practice
  • Runs in a browser with nothing to install
  • Accounts save code and track completion
  • Users can author custom Java or Python problems
  • Teacher reports list student completion counts

Limits

  • Unauthenticated work is forgotten after two idle hours
  • Not all problems have hints or solution code
  • Submitted code and data may be used for teaching-technology research

Who it suits

CodingBat suits learners practicing Java or Python for self-study, homework, labs, or classroom examples. Teachers can use shared account information to view student completion counts.

Verdict

CodingBat offers focused Java and Python practice with browser execution, optional progress tracking, and custom problem authoring. Learners who want work saved should use an account.

Where Specifiction places it

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