Fifty (plus) applications, chrome extensions, web apps, and everything in between that will hopefully come in handy at some point in your programming life. I will keep updated as new tools are discovered. Please feel free to add to the comments anything you find.

1. Whatruns

A free browser extension that helps you identify technologies used on any website at the click of a button.

Go to Site Whatruns

2. Sizzy

The browser for developers. Stop wasting time and speed up your development workflow

Go to Site Sizzy

3. Log Rocket

LogRocket lets you replay what users do on your site, helping you reproduce bugs and fix issues faster

Go to Site Log Rocket

4. Sentry

Sentry’s application monitoring platform helps every developerdiagnose, fix, and optimize the performance of their code.

Go to Site Sentry

5. Can I Use?

“Can I use” provides up-to-date browser support tables for support of front-end web technologies on desktop and mobile web browsers.

Go to Site Can I Use

6. Prettier

An opinionated code formatter, Supports many languages,Integrates with most editors,Has few options.

Go to Site Prettier

7. CSS Scan

Goodbye to “Inspect Element” — Check the CSS of any element you hover over, instantly, and copy its entire rules with a single click.

Go to Site CSS Scan

8. Bundlephobia

Find the cost of adding a npm package to your bundle

Go to Site Bundlephobia

9. Cypress

Fast, easy and reliable testing for anything that runs in a browser.

Go to Site Cypress

10. Unminify

Free tool to unminify (unpack, deobfuscate) JavaScript, CSS, HTML, XML and JSON code, making it readable and pretty.

Go to Site Unminify

11. RegEx 101

Free PCRE-based regular expression debugger with real time explanation, error detection and highlighting.

Go to Site RegEx 101

12. Clear Cache

Clear your cache and browsing data with a single click of a button.

Go to Site Clear Cache

13. Window Resizer

Resize the browser window to emulate various screen resolutions.

Go to Site Window Resizer

14. Wappalyzer

Wappalyzer is a utility that uncovers the technologies used on websites. It detects content management systems, ecommerce platforms, web frameworks, server software, analytics tools and many more

Go to Site Wappalyzer

15. MDN

The MDN Web Docs site provides information about Open Web technologies including HTML, CSS, and APIs for both Web sites and progressive web apps.

Go to Site MDN

16. Axe

The Standard in Accessibility Testing. Chosen by Microsoft, Google, development and testing teams everywhere, axe is the World’s leading digital accessibility toolkit.

Go to Site Axe

17. Git Graph

Git Graph extension for Visual Studio Code. View a Git Graph of your repository, and easily perform Git actions from the graph. Configurable to look the way you want!

Go to Site Git Graph

18. Kontrast - WCAG Contrast Checker

Quickly check and adjust contrast in realtime in your browser to meet WCAG 2.1 requirements.

Go to Site Kontrast

19. Octotree

Browser extension that enhances GitHub code review and exploration.

Go to Site Octotree

20. Postwoman

Web alternative to Postman - Helps you create requests faster, saving precious time on development

Go to Site Postwoman

21. Responsively App

Develop responsive web apps 5x faster! A must-have DevTool for all Front-End developers that will make your job easier.

Go to Site Responsively App

22. FullStory

Deliver exceptional experiences by letting our easy-to-use, intelligent software pinpoint when, where, and how user struggle is affecting your revenue and retention

Go to Site FullStory

23. gitignore.io

Create useful .gitignore files for your project

Go to Site gitignore.io

24. 1Loc

206 Favorite JavaScript Utilities in single line of code! No more!

Go to Site 1Loc

25. Does it mutate?

Go to Site Does it mutate?

26. Keycode

Press any key to get the JavaScript event keycode

Go to Site Keycode

27. Worth It: Modern JS edition

This tool analyzes a page to determine how much less JavaScript is downloaded in modern browsers as a result of it using the module/nomodule pattern.

Go to Site Worth It

28. npmview

A web application to view npm package files.

Go to Site npmview

29. CSS to JS

Transform between CSS, JS Objects and JSX props.

Go to Site CSS to JS

30. All Characters

A simple page that shows all the different characters and their HTML code.

Go to Site All Characters

31. Shape Catcher

This is a tool to help you find Unicode characters. Finding a specific character whose name you don’t know is cumbersome. On shapecatcher.com, all you need to know is the shape of the character!

Go to Site Shape Catcher

32. Mocky

Don’t wait for the backend to be ready, generate custom API responses with Mocky and start working on your application straightaway

Go to Site Mocky

33. Explain Shell

Write down a command-line to see the help text that matches each argument

Go to Site Explain Shell

34. Base64 Image

Convert your images to Base64

Go to Site Base64 Image

35. Open Graph Check

When sharing content on Facebook and other social networks, clickattractivity is really important. An optimized preview tailored to the target group leads to significant improvements in the Click Trough Rate. Opengraphcheck.com will help you do the job best. And the most awesome thing is the Open Graph Check is for free!

Go to Site Open Graph Check

36. Brotli pro

Brotli. Next Level. Compression. Ready?

Go to Site Brotli pro

37. Responsive Breakpoints

Easily generate the optimal responsive image dimensions

Go to Site Responsive Breakpoints

38. Is my host fast yet?

Real-world server response (Time to First Byte) latencies, as experienced by real-world users navigating the web.

Go to Site Is my host fast yet?

39. Check My Links

Check My Links is a link checker that crawls through your webpage and looks for broken links.

Go to Site Check My Links

40. JSON Web Token

Encode or Decode JWTs

Go to Site JSON Web Token

41. Git Kraken

Legendary Git client for Windows, Mac & Linux. Free for open source

Go to Site Git Kraken

42. BEM Cheat Sheet

When it comes to finding the right class name, it can quickly drive you to despair. Even the most experienced CSS developers don’t always find the right class name right away. This tool aims to help you to not get lost in the BEM cosmos by giving you naming-suggestions for some of the most common web components.

Go to Site BEM Cheat Sheet

43. Can I Email

Go to Site Can I Email

44. CSS Grid Generator

You can set the numbers, and units of your columns and rows, and I’ll generate a CSS grid for you! Drag within the boxes to create divs placed within the grid.

Go to Site Css Grid Generator

45. Screen size map

A comparison of screen sizes in device-independent pixel

Go to Site Screen size map

46. Who can use?

Who can use this color combination?

Go to Site Who can use?

47. Will it CORS?

Tell this magic CORS machine what you want, and it’ll tell you exactly what to do.

Go to Site CORS

48. extractCSS

Extract CSS from HTML

Go to Site extractCSS

49. Metatags

With Meta Tags you can edit and experiment with your content then preview how your webpage will look on Google, Facebook, Twitter and more!

Go to Site Metatags

50. Shieldfy

Automatically identify and fix security issues and vulnerabilities in your code before it hits to production.

Go to Site Shieldfy

51. YAML Checker

YAML Checker provides a quick and easy way to validate YAML. As you type, your YAML will be validated with beautiful syntax highlighting and error information.

Go to Site YAML Checker

52. Polypane

All the tools you need to build amazing responsive, accessible and fast websites and apps in a single standalone browser.

Go to Site Polypane