Modernize your JavaScript code. In under 10 minutes.

Create pull requests to use new language features and apply best practices. For JavaScript and TypeScript.
Upgrade your code
“P42 helps us keep the code of our various Vega repositories consistently up to date with modern JavaScript and TypeScript standards." - Dominik MoritzVega
P42 upgrades your codebase while you relax.

Effortlessly upgrade your codebase instead of spending months on painful, dull manual refactoring. Your time is better spent on implementing exciting features and solving challenging bugs.

P42 informs you about the latest best practices.

Stay up to date with the latest best practices, language syntax, and libraries. The JavaScript ecosystem changes fast - P42 ships new code modernizations regularly, so you don't have to worry about every detail.

P42 helps you accelerate your software development.

Speed up development by having a modern and consistent codebase. Inconsistencies and outdated techniques can slow you down significantly - don't fall into this trap!

Analyze Your Code

No more guesswork and manual checks. P42 scans the code in your GitHub repositories for improvements on every commit.
P42 Code Analysis Overview

Open Pull Requests

Create pull requests for the suggested changes with a single click. Your GitHub actions can test and verify the pull request.
P42-generated GitHub Pull Request

Automatic Code Reviews

Don't let outdated code patterns come back to life. P42 automatically reviews your pull requests and commits and flags any changes that would need modernization.
P42 Commit Checks on a GitHub Pull Request