Discover the best free online tools that every developer should use to save time, debug faster, and improve productivity.

Developers today are lucky — there are hundreds of free tools that make coding, testing, and deploying apps easier than ever.
Here are 10 must-know online tools to boost your development workflow:

1. CodePen – A powerful online playground for HTML, CSS, and JavaScript.
2. JSON Formatter – Clean and validate JSON files instantly.
3. RegExr – Learn and test regular expressions in real time.
4. Postman Web – Test APIs directly in your browser.
5. GitHub Gist – Share code snippets quickly and securely.
6. DevDocs – All documentation in one place with offline mode.
7. Can I Use – Check browser compatibility for CSS & JS features.
8. StackBlitz – Run Angular, React, or Vue projects instantly online.
9. Carbon – Turn your code into beautiful images.
10. Online Regex Tester – For quick debugging of regex patterns.

💡 Tip: Bookmark your favorite tools — they can save you hours of work every week.