Master codinginterviewswith AI.
CodeForge AI combines LeetCode-style problems, an online compiler, AI pair programming, spaced repetition and skill analytics — all free.
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Problems solved daily
Languages supported
AI-powered tools
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Platform features
- JavaScript
- TypeScript
- Python
- Java
- C
- C++
- C#
- Go
- PHP
- Rust
- Kotlin
- Swift
Engineers at world-class companies practice here
- Meta
- Amazon
- Microsoft
- Netflix
- Uber
- Atlassian
- Apple
27+ features. Zero paywalls.
One platform for algorithms, the instant compiler, AI tools, community and analytics.
Everything, one scroll away
Write, run, learn and track — the full loop, stacked.
VS Code-style editor
Full IntelliSense, Vim mode, 12 languages, hidden test cases and instant verdicts — zero config.
def maxProfit(prices):
min_price = float("inf")
max_profit = 0
for price in prices:
min_price = min(min_price, price)
max_profit = max(max_profit, price - min_price)
return max_profitInstant online compiler
A blank editor, custom stdin and a secure cloud sandbox — plus a Web mode for HTML/CSS/JS, React and Next.js.
name = input()
print(f"Hello, {name}!")
for i in range(3):
print(i * i)AI mentor that never spoils
Progressive hints that read your exact code and output — concept, approach, edge cases, optimization.
Watch your code run
Run your solution and see it animate step by step. If it's right, watch how it works; if it's wrong, see exactly where it breaks.
Compare 5 and 2 → swap
Analytics + spaced repetition
Weakness detection tells you where to focus; SM-2 resurfaces problems right before you forget.
9 AI tools. One platform.
From personalized coaching to pair programming — AI is woven into every part of your practice.
Learning Coach
Personalized guidance for your weak areas
Pair Programmer
Conversational, real-time coding help
Roadmap Generator
A study path toward your target role
Resume Analyzer
Feedback tuned to engineering roles
Code Reviewer
Correctness, style and edge cases
Complexity Visualizer
Big-O for any snippet, explained
From zero to offer in three steps
Create your free account
Sign up with email, Google or GitHub. Pick your track: DSA, Frontend, or both. Takes 30 seconds.
Solve, practice, and learn
Code in a full editor. The AI mentor gives hints. Spaced repetition locks in patterns.
Level up and get hired
Earn XP, keep streaks, climb leaderboards, and walk into any interview prepared.
+ real interview questions, ready to run.
DSA classics, JavaScript deep-dives and React pattern exercises — every problem executes against hidden test cases in the cloud.
Browse All ProblemsLoved by thousands of coders
“The AI mentor is the closest thing to a senior engineer next to you. Finally internalized sliding window.”
“Every other platform ignores frontend folks. The sandbox challenges with AI design review are exactly what I needed.”
“94-day streak and counting — went from failing easies to clearing mediums in one sitting.”
“Pair Programmer plus spaced repetition changed how I retain algorithms. Stopped forgetting patterns.”
“Generated my entire 8-week study plan in 30 seconds. It even accounted for my weak topics.”
“Weakness detection put my graph acceptance at 20%. Three weeks later it's 85%. Data-driven practice works.”
Start free, level up fast.
7-day free trial on all paid plans — you're not charged until it ends, and you can cancel anytime.
Frequently asked
CodeForge AI (codeforgeai.io) is an AI-powered coding-interview prep platform. It combines LeetCode-style DSA problems, an online compiler for 12 languages, frontend sandbox challenges, live contests, personalized roadmaps, spaced-repetition revision and a real-time streaming AI mentor and pair programmer — all in one developer workspace.
Your next offer starts now.
Free forever. 27+ features. 9 AI tools. No credit card — just you, the editor, and an AI mentor that never sleeps.