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.
Loved 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.