Learn modern web development with expert-led courses, tutorials, and workshops. Master React, TypeScript, Next.js, AI tools like Claude Code and Cursor, and more with hands-on video lessons.

Learn modern web development with expert-led courses, tutorials, and workshops. Master React, TypeScript, Next.js, AI tools like Claude Code and Cursor, and more with hands-on video lessons.

You have JavaScript. You need a bookmarklet. This does that.

RegViz is a tool for debugging JavaScript regular expressions in a visual way. Advanced highlighting helps you to understand the structure and purpose of a regular expression and to detect bugs therein. You can test the regular expression on a sample text and formulate test cases. We tried to come up with a very user friendly tool.

This is a web interface to compress your JavaScript or CSS.