Speed performance
Script parsing time and payload size can be reduced by minifying JavaScript files. SeoChecker shows in a table like the one below the JavaScript files of a web page that have not been minified; at the same time, it provides data on their size and on the potential savings in KiB (kibibytes) that minification would entail:
Minification is a process that aims to make code shorter: for example, unnecessary lines of code are made shorter but still valid, and whitespace is removed. Among the most widely used JavaScript compression tools is Terser, and in webpack v4 a plugin for this library is included by default to create minified build files.
Learn more about Speed performance
On page SEO performance and page checkup.
Over 300 parameters for the deeper page analysis.
Share this Guide
Did you like it? Share it!
Web tools for modern developers. Try these one!
Over 50 generators, builders and validators to improve your SEO and web performances
Tester and validators
Test your Progressive Web App. Check the performance of your PWA, try to deliver high quality, engaging, fast and capable apps on every devices.
Validate your Css file sheet with W3C validation Service. Check if the markup of your Cascading style Sheet document is W3C compliant.
Find out which theme, version, author and license a WordPress site is using trought Wordpress Theme detector tool
Builders and generators
Generate your Web App Manifest json and improve site data. Provide information about your website, allow users to quick access for a better experience.
Check color contrast ratio WCAG 2 AA of your pages. Check if your color scheme meet the WCAG 2 AA contrast ratio thresholds.
Analytics Google Tracking script
Generate URLs for iOS Campaign Measurement. Use this free tool to generate URLs for measuring the source of iOS application installs.
Social Tester and validators
Get Facebook data and engagement count by URL. Retrieve Open Graph data, "share" count, comment count and engagement from url.
Content
Explore and compare keywords. Find out what customers are looking for. Select country, date, category, search type and compare keywords.