The code playground for learners
Learn to code, clearly
Paste your code. LINT tells you — brutally clearly — what's right, what's wrong, and exactly why. Built for people learning to code, so you understand it instead of just copying an answer.
Paste your code. LINT tells you — brutally clearly — what's right, what's wrong, and exactly why. Built for people learning to code, so you understand it instead of just copying an answer.
Honest health score so you can track your progress
Every mistake explained clearly, no jargon
See what to keep and what to fix, every time
Not another confusing linter. LINT explains your code the way a patient, brilliant teacher would — so you actually understand it.
LINT tells you exactly what's right and what's wrong — as clearly as humanly possible. No jargon, no vague hints, no confusion. Just the truth in plain English.
Every problem is explained like a great teacher would: what broke, why it broke, and the correct way to think about it — so you actually learn instead of just copying an answer.
Get an honest 0–10 score so you know how close your code is to correct. It's a learning signal that shows your progress, not a punishment.
LINT points out the good habits too, not only the mistakes. Knowing what to keep is just as important as knowing what to fix.
When your code needs fixing, LINT shows the corrected version with comments on what changed — so you can see the difference and understand it.
Learning JavaScript, TypeScript, Python, React, or HTML/CSS? LINT understands your language and explains at your level.
Three steps between you and code you actually understand.
Drop in any snippet or exercise you're working on — homework, a tutorial, or your own experiment. No setup, no config.
LINT reads your code and tells you, as clearly as ever possible, what's correct, what's wrong, and exactly why.
Read the plain-English breakdown, see the corrected version, and understand it — so next time you write it right yourself.
Every analysis ends with an honest 0–10 health score and a clear verdict. It's not a grade to fear — it's a signal that shows how close your code is to correct and how much you're improving.
Anyone learning to code — from your first program to more confident learners who want to understand their mistakes deeply. LINT is a playground for learning, not a tool built only for professional developers.
No. LINT is here to help you learn. It explains what's right and what's wrong extremely clearly and shows corrected code with reasons — so you understand it, not just copy it.
JavaScript, TypeScript, Python, React, and HTML/CSS on the Free plan. More languages are on the way for Pro.
LINT is free to start — no credit card required. You get a set number of analyses every day. A Pro plan with more is coming soon.
Paste your first snippet and see exactly what's right, what's wrong, and why — in seconds. Free to start, no credit card required.