Level Up Your Code Review Skills
Practice reviewing real code. Get instant AI feedback across 5 scoring categories. Track your growth from beginner to expert reviewer.
Analyzing your 3 comments...Score: 42/45 (A - 93%)Passed! Great job identifying the security issues.---Correctness: 28/30 | Performance: 14/150
Scoring Categories
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Rank Tiers
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Languages Supported
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AI-Powered Scoring
How It Works
Three simple steps to sharpen your code review skills
Choose a Problem
Browse curated code snippets with real bugs across multiple languages and difficulty levels.
Review the Code
Add comments like a real code review — click lines, select ranges, and categorize your findings.
Get AI Feedback
Receive instant scoring across 5 categories with letter grades, detailed breakdowns, and improvement tips.
Everything You Need to Master Code Reviews
Built by engineers, for engineers who want to level up
AI-Powered Scoring
Get graded on correctness, performance, design, readability, and testing by advanced AI.
Real Code Editor
Monaco editor with syntax highlighting, line-by-line and multi-line commenting.
Letter Grades
A+ through F grading with detailed category breakdowns so you know exactly where to improve.
Progress Tracking
Track your review history, see your scores improve over time, and celebrate your wins.
Dark Mode
Easy on the eyes for those late-night review sessions.
Multiple Languages
Python, JavaScript, TypeScript, Java, Go, Rust, and more.
Why CodeReviewGym?
Build the skills that make you an invaluable teammate
Practice on Real-World Code
Review actual code snippets across multiple languages and difficulty levels. Each problem mirrors the kind of code you encounter in pull requests every day.
Get Instant AI Feedback
Receive detailed, category-by-category scoring on your review comments. Understand exactly where you excel and where you can improve.
Track Your Progress
Watch your skills grow with a rank system, activity calendar, and review history. See how your scores improve across correctness, performance, design, readability, and testing.
Simple, Transparent Pricing
Start free. Upgrade when you're ready to go all in.
Free
Perfect for getting started
- 5 reviews per month
- Easy problems only
- Basic AI feedback & scoring
- Letter grades
Pro
For serious skill building
- Unlimited reviews
- All difficulty levels
- Detailed AI feedback with examples
- Full review history & progress tracking
- Priority AI processing
- Category-specific practice
Frequently Asked Questions
Everything you need to know about CodeReviewGym