As application and website developers we need to perform good SEO practices, optimizations, share our code, document our application, among other things that do not go hand in hand with the logic of our application and sometimes this takes more development time.
However, there are tools that make life easier for web developers, here I present them to you.

1 METATAGS.IO
https://metatags.io/

meta tag is a tool to generate meta tags. You can also preview how your web page will look like on Google, Facebook, Twitter and more.
And so you will be having a good SEO.

2 CARBON
https://carbon.now.sh/

Carbon is a tool for creating and sharing beautiful images from your source code. Start typing or drop a file into the text area to get started

3 README.SO
https://readme.so/

is an editor that allows you to quickly add and customize all the sections you need for your project's readme file.

4 PAGESPEED
https://pagespeed.web.dev/

Page speed is a Google tool that shows how long it takes to load all the resources on a page.
This tool gives us information about files or elements from a specific URL, which delay or delay the full load of the page in order to improve your time.

5 EXTRACT CSS
http://extractcss.com/

allows you to extract element id, class and inline styles from html document and output them as css stylesheet