Telegram.org Telegram Messenger
telegram.org Mobile Performance
91/100
These metrics represent real-world Chrome users experience viewing telegram.org on mobile devices. Reports are focused on loading performance and other critical factors that most affect user experience. Follow our guide to track, optimize, and improve the quality of your web pages.
User Loading Experience
First Contentful Paint
First Input Delay
Cumulative Layout Shift
Largest Contentful Paint
Metrics
Largest Contentful Paint71/100 3.3 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
Speed Index94/100 3.0 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
First Contentful Paint98/100 1.6 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Time to Interactive99/100 2.3 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Cumulative Layout Shift100/100 0
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Total Blocking Time100/100 50 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
Should Fix (10)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Serve images in next-gen formats
Potential savings of 270 KiB
1,050 ms
Properly size images
Potential savings of 197 KiB
900 ms
Eliminate render-blocking resources
Potential savings of 340 ms
338 ms
Remove unused CSS
Potential savings of 25 KiB
300 ms
Minify CSS
Potential savings of 5 KiB
150 ms
Diagnostics
More information about the performance of your application. These numbers don't directly affect the Performance score.
Serve static assets with an efficient cache policy
23 resources found
Avoid long main-thread tasks
5 long tasks found
Largest Contentful Paint element
1 element found
Keep request counts low and transfer sizes small
30 requests • 1,393 KiB
Avoid chaining critical requests
8 chains found
Passed Audits (18)
Uses passive listeners to improve scrolling performance
Initial server response time was short
Root document took 480 ms
Minify JavaScript
Efficiently encode images
Potential savings of 12 KiB
Preload key requests
Avoids an excessive DOM size
221 elements
Minimize third-party usage
Third-party code blocked the main thread for 80 ms
Remove unused JavaScript
Preconnect to required origins
Minimizes main-thread work
1.1 s
Enable text compression
Defer offscreen images
Avoids enormous network payloads
Total size was 1,393 KiB
Avoid multiple page redirects
Potential savings of 630 ms
JavaScript execution time
0.3 s
All text remains visible during webfont loads
Avoids `document.write()`
Use video formats for animated content
telegram.org Mobile SEO
83/100
These checks ensure that your page is optimized for search engine results ranking. There are additional factors Lighthouse does not check that may affect your search ranking. Learn more. Run these additional validators on your site to check additional SEO best practices.
Should Fix (2)
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Document does not have a meta description
Image elements do not have `[alt]` attributes
Passed Audits (10)
Document avoids plugins
Tap targets are sized appropriately
100% appropriately sized tap targets
Document uses legible font sizes
100% legible text
Document has a valid `hreflang`
Links have descriptive text
Links are crawlable
Page isn’t blocked from indexing
Document has a `<title>` element
Page has successful HTTP status code
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
telegram.org Mobile Best Practices
85/100
These checks highlight opportunities to improve the overall code health of telegram.org mobile page. Current recommendations will help to make your page fast and secure, to create a good user experience and to avoid deprecated technologies.
Should Fix (2)
Trust and Safety
Links to cross-origin destinations are unsafe
Does not use HTTPS
1 insecure request found
Passed Audits (12)
Avoids front-end JavaScript libraries with known security vulnerabilities
Detected JavaScript libraries
Avoids deprecated APIs
Displays images with correct aspect ratio
No browser errors logged to the console
Avoids Application Cache
Avoids requesting the geolocation permission on page load
Avoids requesting the notification permission on page load
Allows users to paste into password fields
Page has the HTML doctype
Serves images with appropriate resolution
Properly defines charset
telegram.org Mobile Progressive Web App
46/100
These checks validate the aspects of a Progressive Web App. Learn more. These checks are required by the baseline PWA Checklist but are not automatically checked by Lighthouse. They do not affect your score but it's important that you verify them manually.
Should Fix (9)
Installable
Does not register a service worker that controls page and `start_url`
Web app manifest does not meet the installability requirements
Does not use HTTPS
1 insecure request found
Fast and reliable
Current page does not respond with a 200 when offline
`start_url` does not respond with a 200 when offline
PWA Optimized
Does not set a theme color for the address bar.
Does not provide a valid `apple-touch-icon`
Manifest doesn't have a maskable icon
Is not configured for a custom splash screen
Passed Audits (5)
Page load is fast enough on mobile networks
Contains some content when JavaScript is not available
Content is sized correctly for the viewport
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Redirects HTTP traffic to HTTPS
telegram.org Mobile Accessibility
71/100
These checks highlight opportunities to improve the accessibility of your web app. Only a subset of accessibility issues can be automatically detected so manual testing is also encouraged. These items address areas which an automated testing tool cannot cover. Learn more in our guide on conducting an accessibility review.
Should Fix (5)
Navigation
These are opportunities to improve keyboard navigation in your application.
Heading elements are not in a sequentially-descending order
Internationalization and localization
These are opportunities to improve the interpretation of your content by users in different locales.
`<html>` element does not have a `[lang]` attribute
Names and labels
These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.
Links do not have a discernible name
Image elements do not have `[alt]` attributes
Contrast
These are opportunities to improve the legibility of your content.
Background and foreground colors do not have a sufficient contrast ratio.
Passed Audits (8)
`<video>` elements contain a `<track>` element with `[kind="description"]`
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
`<video>` elements contain a `<track>` element with `[kind="captions"]`
`[aria-hidden="true"]` is not present on the document `<body>`
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Document has a `<title>` element
The page contains a heading, skip link, or landmark region
Mobile Usability
100/100
These checks validate how easily a visitor can use telegram.org on a mobile device. Test results include a list of any mobile usability problems. Mobile usability problems are issues that can affect a user that visits the page on a mobile (small screen) device, including small font sizes (which are hard to read on a small screen).
Passed Audits (5)
Avoid plugins
Configure the viewport
Size content to viewport
Size tap targets appropriately
Use legible font sizes
Mobile Speed
69/100
These checks analyze the performance of telegram.org on mobile devices and return PageSpeed score and information on how to improve the load time. What makes a good Progressive Web App?
Should Fix (4)
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Leverage browser caching
Optimize images
Minify JavaScript
Passed Audits (6)
Avoid landing page redirects
Enable compression
Reduce server response time
Minify CSS
Minify HTML
Prioritize visible content
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