I believe that a good tool can help you create high quality Web applications by making your development work more efficient.
In this article, I've sorted out 16 important web development tools that cover CSS, JavaScript, image optimization, and other web development efforts, and I hope this will help you with your development efforts.
CSS Tools
1. simpless
This is a free offline pager code compiler. If you want to use pager, you'll find that this is a great tool that can automatically detect code changes and compile it. Available on Mac, Windows, and Linux platforms.
2. Csswrap
This is a cool CSS text path generation tool.
3. Layerstyles
Don't want to memorize new CSS3 features and prefixes? The tool uses an interface similar to the Photoshop layer style, allowing you to easily configure shadows, backgrounds, borders, and boundary radii.
4. Bearcss
The tool can generate CSS templates based on the HTML documents that are uploaded and the HTML elements they use.
Second, JavaScript tools
5. Bookmarkleter
The tool can convert your JavaScript code into a small bookmark to help you with code compression and URL coding.
6. JSLint
This is a JavaScript debugging tool. You can find potential problems in your code and return a message telling you the problem and the location.
7. showif
This is a simple if...else tool that allows users to set conditions based on the client environment (browser, operating system, resolution, and so on) and perform the specified action if the condition matches.
Third, image optimization tools
8. JPEG Mini
Reduces the size of the picture to the original 1/5, while maintaining the original quality and formatting of the JPEG image.
9. Punypng
The tool can greatly reduce the size of the image file without any loss of quality.
Spritepad
A fast, user-friendly online CSS sprite generator that supports image drag and can generate the CSS code you need.
Spriteme
The tool creates CSS sprite in a different way. This is a bookmark, you can detect the image in your site, and the corresponding CSS sprite.
Iv. Other Tools
Browsers
Practical browser sandbox. You can run any browser without having to install them on your computer. Only Windows platforms are currently supported.
Spurapp
The tool uses a variety of methods to test the usability and layout of the page, using techniques such as grayscale, intersections, intervals, contrasts, blurs, mirrors, and so on, to show you the design flaws that you might overlook.
Pingdom
Used to test the load time of the site and analyze it to help you identify bottlenecks.
Loads.in
Another tool to calculate the load time of a Web site.
HTML5 Test
Test browser support for HTML5 standards and specifications.
Original: Essential Web Development Online Tools