Accessibility
Users who are deaf or hard of hearing need captions that give them information about the videos on a web page: e.g. who is speaking, what they are saying and what is happening.
When <video> elements have no <track> element with the attribute kind=”captions”, SeoChecker will notify it.
<video> element with the kind=”captions” attribute need minimum one track element.
<video width="300" height="200"> <source src="marathonFinishLine.mp4" type="video/mp4"> <track src="captions_en.vtt" kind="captions" srclang="en" label="english_captions"> <track src="audio_desc_en.vtt" kind="descriptions" srclang="en" label="english_description"> <track src="captions_es.vtt" kind="captions" srclang="es" label="spanish_captions"> <track src="audio_desc_es.vtt" kind="descriptions" srclang="es" label="spanish_description"> </video>
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
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.
Analytics Google Tracking script
Send Web Vitals metrics to Analytics for better tracking. Measures and send Google Core Web Vitals to your Analytics account.
Check SEO performance and page checkup. Over 250 parameters for the deeper page analysis. Find out more about the performance of your website.
Google Server and proxy
Find out the exact date and time your web page was cached by Google’s crawler through Google Cache Status checker
Builders and generators
Create your personalized Barcode in over 70 formats. Choose your data, formats and colors and get your personalized Barcode.
Test your Web Vitals metrics, score and diagnostic. Measures Google Core Web Vitals LCP, FID, CLS, TTFB, FCP, TTI, TBT and more.
Generate URLs for Google Play Campaign Measurement. Add Google Analytics Campaigns parameters to Google Play Urls - Android SDK.
Converters
Pixel - Rem - Point units converter. Convert Pixel to REM or Point unit in seconds and vice versa with this free converrter.