Accessibility
In order to avoid that your page renders in ways you did not expect, you need to specify a doctype.
If a page has no <!DOCTYPE html> declaration, SeoChecker will notify it.
You need to add the doctype declaration at the top of the HTML document.
Learn more about Accessibility
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
Builders and generators Google
Draw rectangles, circle, polygon, polyline and shape on maps and get coordinates. Set styles and colors for your drawed shapes and get the code.
Images
Quicly capture any web page screenshot and thumbnails. Get image rendering on desktop and mobile and thumbnails filmstrip with loading timing.
Google
Find out how Google calculates your overall Performance score. Drag the cursors to understand what thresholds you must be aiming for achieving a good performance
Builders and generators
Generate beautiful color palette combinations for your designs. Get your combination scheme: analogous, triadic, complementary and so on.
Analytics Google Tracking script
Send Web Vitals metrics to Analytics for better tracking. Measures and send Google Core Web Vitals to your Analytics account.
Tester and validators
Test your web pages structured data. Check conformity of your structured data json-ld and improve your SEO.
Generate URLs for iOS Campaign Measurement. Use this free tool to generate URLs for measuring the source of iOS application installs.
Validate your AMP pages with this tool. Test your Accelerated Mobile Pages, get detailed report and optimize performance.