Code that compiles is not always code that is safe, maintainable, or correct. Bugs, security risks, and refactoring debt often stay hidden until they become expensive problems. LearnCodeGuide helps you catch them earlier, with less guesswork.
What it does
One workflow. Full coverage.
LearnCodeGuide combines bug detection, security checks, refactor suggestions, code explanations, and test ideas in one place. Pick the mode you need and get structured results with line references and fixes.
Bug detection
Catch logic mistakes, edge cases, and likely runtime failures before they hit production. Each finding includes severity, the affected line, and replacement code.
Security scanning
Detect risky patterns like SQL injection, XSS, unsafe auth flows, and weak input handling — with severity and a concrete fix suggestion.
Refactor suggestions
Get cleaner, shorter, and easier-to-maintain code suggestions — specific extractions and simplifications, not just notes about code smell.
Step-by-step explanations
Understand what the code does, why it fails, and what each fix changes. Useful for legacy code, unfamiliar patterns, and onboarding.
Unit test ideas
Generate useful test cases around edge cases, invalid input, and common failure paths — based on what the code actually does.
All-in-One mode
Run all five checks in a single pass. Bug detection, security, refactoring, explanation, and test ideas — combined in one structured report.
How it works
Three steps. Under a minute.
No IDE plugin. No CI setup. No configuration file. Paste the code, pick a mode, get results.
1
Paste code or upload a file
Choose a language — JavaScript, Python, Java, C#, or C++ — and pick a mode: Debug, Security, Refactor, Explain, Tests, or All-in-One.
2
Run the analysis
LearnCodeGuide evaluates the snippet and returns structured findings. Optionally activate Double Check to run a second AI model for extra confidence.
3
Review exact findings and fixes
See each issue by severity — critical, high, medium, or low — with the exact line number, why it matters, and the replacement code to apply.
Why it's different
Not generic feedback. Actionable findings.
Most tools give you generic feedback. LearnCodeGuide focuses on findings you can use immediately — what to change, on which line, and why it matters.
Supported languages
The five languages most teams actually use.
JavaScript, Python, Java, C#, and C++. TypeScript and JSX are supported as part of the JavaScript option.
JavaScript
Frontend, backend, Node.js
Python
Scripting, APIs, data
Java
Backend, enterprise
C#
.NET applications
C++
Systems, performance
When to use it
Useful at every point in the workflow.
Before a commit
Catch issues before they go into the codebase
Run a quick analysis on the changed files before pushing. Catches the kind of bugs that reviewers miss under time pressure.
During debugging
Narrow down likely failures faster
Paste the function that's misbehaving and get a structured list of probable failure points — with line references and severity.
Security reviews
Spot risky patterns before they ship
Scan for SQL injection, XSS, hardcoded secrets, and unsafe auth flows before they reach staging or production.
Refactoring
Improve structure and readability
Get concrete refactor suggestions — specific extractions, simplifications, and replacements — not just vague notes about code smell.
Learning unfamiliar code
Understand intent faster
Use Explain mode on legacy code, new libraries, or anything you didn't write. Get a plain-English breakdown of what it does and where it might fail.
Learn
Learn from real examples.
Explore short, practical guides on finding bugs, understanding code, and writing safer, cleaner software.
Covering bugs, security, refactoring, and code quality across JavaScript, Python, Java, TypeScript, and more.
Pricing
Start free. Pay only when you need more.
A 14-day trial with no card required. Upgrade to Pro when you are ready, buy credits once if you do not need a subscription, or automate reviews with GitHub Actions.
TRIAL
$0/14 days
Try the full product before committing. No card required.
It analyzes pasted or uploaded code for bugs, security risks, refactor opportunities, code explanations, and test ideas — depending on the selected mode. All-in-One runs everything at once.
Do I need to upload a full project?
No. You can start with a single function, file, or snippet. LearnCodeGuide works on whatever you paste — no project setup or full codebase required.
What modes are available?
Debug, Security, Refactor, Explain, Tests, and All-in-One. There is also a Double Check option that runs a second AI model on the same code for extra verification — available on Pro and PAYG plans.
How is this different from a normal AI chat tool?
LearnCodeGuide is structured around code analysis. Every result includes severity levels, exact line numbers, and replacement code — without needing to write a prompt or interpret an open-ended answer.
What languages are supported?
JavaScript (including TypeScript and JSX), Python, Java, C#, and C++.
Start analyzing your code in seconds.
Free trial · No credit card required · JS, Python, Java, C#, C++ · Results in under 5 seconds