Useful tools to analyse a website

SEO compatibility check – gives an overview of whats right and what can be improved
Google page speed insight – “PageSpeed Insights analyzes the content of a web page, then generates suggestions to make that page faster”
Yslow – Can add as extension to Firefox or Chrome
webpagetest.org
Pingdom
Optimize images
Markup Validation Service

Recently I used these tools (including Firebug) for a client’s WordPress based blog. The areas of improvement -

1) There was no caching of static assets – added max-age with conditional check (last-modified). Read this explanation
2) Scaling images – Do not scale images in HTML
3) Optimizing images – This helped a lot. Images were of much bigger size than needed to be.
4) Minimize HTTP requests – too many images, so one possible solution is CSS Sprites
5) Minification of js and css files

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