Autograder for CS Courses | Instant Feedback

Grade Less, Teach More with Automated Feedback

Students need a lot of practice, but that shouldn't mean endless grading for you.

CodeGrade's autograder evaluates code submissions the moment students hit submit. They get detailed, line-by-line feedback instantly. You get your evenings back.

Grades submissions automatically against your criteria
Gives students instant, actionable feedback instead of waiting days
Consistent and fair across every student, every time

Detailed automatic grading feedback in CodeGrade with a failing test expanded.

CodeGrade's block-based test builder: drag-and-drop IO, unit, and structure tests connected to a rubric.

No Dockerfiles. No Endless Menus. Just Drag, Drop, Grade.

Most autograders make setup feel like a second job. CodeGrade's block-based test builder lets you build test configurations visually. No boilerplate, no config files.

Link tests to rubrics for clear, objective grading. Set it up once and reuse it across sections or semesters.

Input/output, unit, code quality, and structure tests, all drag-and-drop
Configure in minutes, not hours
Need help? Our support team, all CS graduates, will set it up with you

Simple When You Want It. Powerful When You Need It.

Teaching intro Python? Drag a few blocks and you're done. Running advanced systems programming? You get a full Ubuntu environment with complete control. So do your students: the same environment powers the editor and terminal they work in, so what you test is exactly what they ran.

CodeGrade scales from your first assignment to your most complex project, and our API lets you automate everything in between. The autograder is the center of the Integrated Learning Environment: the editor, terminal, AI assistant, and gradebook sync built around it.

Full Ubuntu VMs with support for any language or framework
Deep code analysis with tools like Semgrep, ESLint, PyLint, and cppcheck
Custom scripts, file checks, and advanced logic, or automate via the API

The student's terminal and the AutoTest run side by side: the same Ubuntu environment for working and grading.

Grade code in minutes, not weekends.

Automatic grading, structured rubrics, and manual review tools that work together. Free for up to 50 students.

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Frequently Asked Questions

What is an autograder?

An autograder is software that automatically evaluates student code submissions by running them against predefined tests. When a student submits code, the autograder compiles it, executes it, checks the results against expected outputs, and returns detailed feedback. Modern autograders like CodeGrade go beyond pass/fail results to include rubric scoring, inline code feedback, and plagiarism detection.

How does automated grading work for programming courses?

The instructor sets up test cases (unit tests, I/O tests, or code quality checks) for each assignment. When students submit their code, the autograder runs every submission through those tests in a sandboxed environment. Results are returned instantly: which tests passed, what went wrong, and how the submission scores against the rubric. With CodeGrade, the entire process takes seconds, even for classes of 500+ students.

What programming languages does CodeGrade's autograder support?

CodeGrade supports over 175 programming languages out of the box, including Python, Java, C, C++, JavaScript, R, SQL, MATLAB, and many more. Every submission runs in a full Ubuntu virtual machine, so any language or framework you can install on Linux works with CodeGrade.

Is CodeGrade's autograder free?

Yes. CodeGrade Free includes full autograding, rubrics, inline feedback, plagiarism detection, and a browser-based code editor for courses up to 50 students. No credit card, no trial period, no expiration. When you need LMS integration, AI assistance, or support for larger courses, paid plans start at $24 per student per course.

How is CodeGrade different from other autograders?

Most autograders require you to write config files, Dockerfiles, or CI pipeline scripts to set up tests. CodeGrade uses a visual drag-and-drop test builder that lets you configure autograding in minutes without writing any configuration code. It also includes features other autograders lack: built-in rubrics, inline code feedback, plagiarism detection, LMS integration, and a browser-based code editor, all in one platform.

Can I use CodeGrade with my LMS?

CodeGrade integrates natively with Canvas, Blackboard, Moodle, and Brightspace through LTI. Students submit and see feedback without leaving the LMS, and grades sync to your gradebook automatically. LMS integration is available on the Advanced plan ($39/student/course).

More features

Rubrics that connect to your autograder

Build rubrics with discrete or continuous categories. Auto-fill scores from autograder results. See rubric statistics across the class.

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The Integrated Learning Environment: the IDE built for learning

One place inside Canvas, Blackboard, Moodle, or Brightspace where students write and run real code, get instant feedback, and use AI on your terms. And where you see all of it.

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