Kahoot - Kahoot.it

Overview

Snoop Summary for kahoot.it

This is a free and comprehensive report about kahoot.it. Kahoot.it is hosted in Ashburn, Virginia in United States on a server with an IP address of 34.227.15.91, where USD is the local currency and the local language is English. Kahoot.it is expected to earn an estimated $16,564 USD per day from advertising revenue. The sale of kahoot.it would possibly be worth $12,091,875 USD. This figure is based on the daily revenue potential of the website over a 24 month period. Kahoot.it is unbelievably popular with an estimated 1,779,017 daily unique visitors. This report was last updated 28th September, 2023.

About kahoot.it

Site Preview:
Title:	Kahoot!
Description:	Join a game of kahoot here. Kahoot! is a free game-based learning platform that makes it fun to learn – any subject, in any language, on any device, for all ages!
Keywords and Tags:	classroom, education, engagement, fun, game, games, gamification., html5, inclusive, kah, kahoot, kahoot code, kahoot create, kahoot enter game pin, kahoot enter pin, kahoot game pin, kahoot it, kahoot it create log in, kahoot join, kahoot live, kahoot pin, kahootit, learn, learning model, mobile, multi-player, pedagogy, platform, play, play kahoot, quiz, reference, smart phone, social, tablet, www kahoot it
Related Terms:	kahoot com, kahoot game, kahoot hack, kahoot login, kahoot names, kahoot sign in, www kahoot
Fav Icon:
Age:
Domain Created:
Domain Updated:
Domain Expires:

Review

Snoop Score

4/5 (Excellent!)

Valuation

$12,091,875 USD

Note: All valuation figures are estimates.

Popularity

Worldwide Sensation

Note: Popularity is estimated.

Rank, Reach and Authority

Alexa Rank:	1,509
Alexa Reach:
SEMrush Rank (US):	2,062
SEMrush Authority Score:	68
Moz Domain Authority:	77
Moz Page Authority:	68

Organic vs Paid (Google Ads)

	Organic	Paid
Keywords:	12,123	0
Traffic:	1,595,185	0
Cost:	$2,622,967 USD	$0 USD

Traffic

Visitors

Daily Visitors:	1,779,017
Monthly Visitors:	54,147,681
Yearly Visitors:	649,341,293

Note: All visitors figures are estimates.

Visitors By Country

Revenue

Daily Revenue:	$16,564 USD
Monthly Revenue:	$504,162 USD
Yearly Revenue:	$6,045,932 USD

Note: All revenue figures are estimates.

Revenue By Country

SEO

Backlinks Analysis (SEMrush)

Backlinks:	1,059,649
Referring Domains:	11,726
Referring IPs:	11,632

Kahoot.it has 1,059,649 backlinks according to SEMrush. 95% of these backlinks are "dofollow" (follow) links which allow the flow of link equity to pass through, which may improve kahoot.it's search engine rankings. Other links are treated as 'hints' by search engines and may also pass link equity, depending on what search engines decide in each case.

98% of kahoot.it's backlinks are text and image links, which are ideal for SEO. Other backlink types may be unrecognized or ignored by search engines.

Top Ranking Keywords (US)

1

Keyword: kahoot it

Ranked Page: https://kahoot.it/

2

Keyword: kahoot

Ranked Page: https://kahoot.it/

3

Keyword: kahootit

Ranked Page: https://kahoot.it/

4

Keyword: kahoot pin

Ranked Page: https://kahoot.it/

5

Keyword: kahoot create

Ranked Page: https://create.kahoot.it/

Domain Analysis

	Value	Length
Domain:	kahoot.it	9
Domain Name:	kahoot	6
Extension (TLD):	it	2

Page Speed Analysis

Average Load Time:	1.76 seconds
Load Time Comparison:	Faster than 41% of sites

Avg. (All Categories)

Performance

Accessibility

Best Practices

SEO

PWA

0–49 (Fail) 50–89 (Average) 90–100 (Pass)

URL: https://kahoot.it/

Updated: 4th November, 2022

3.14 seconds

First Contentful Paint (FCP)

36%

37%

27%

0.01 seconds

First Input Delay (FID)

97%

2%

1%

Simulate loading on desktop

Performance

Indicates how well the page is performing and highlights opportunities where performance may be improved for kahoot.it. This includes details about optimizing page load times which can result in a better user experience.

Metrics

Time to Interactive — 2.3 s
The time taken for the page to become fully interactive.

Cumulative Layout Shift — 0.001
Cumulative Layout Shift is the measurement of visible elements collective movement within the viewport.
View Data

Other

Eliminate render-blocking resources — Potential savings of 0 ms
Resources, such as JavaScript and style sheets, can block the first paint of the page. Kahoot.it should consider delivering critical JavaScript/style sheets (JS/CSS) inline and deferring all non-critical JS/CSS.

URL	Transfer Size (Bytes)	Potential Savings (Ms)
https://assets-cdn.kahoot.it/controller/v2/assets/index.83ea2bf4.css	11626	230

Show Details

Properly size images
Images can slow down the page's load time. Kahoot.it should consider serving more appropriate-sized images.

Defer offscreen images
Time to Interactive can be slowed down by resources on the page. Kahoot.it should consider lazy-loading offscreen and hidden images.

Minify CSS
Cascading Style Sheets (CSS) files can contribute to network payload sizes. Kahoot.it should consider minifying CSS files.

Minify JavaScript
JavaScript (JS) files can contribute to network payload sizes and increase script parse times. Kahoot.it should consider minifying JS files.

Reduce unused CSS — Potential savings of 11 KiB
Dead and/or unused rules in Style Sheets (CSS) can contribute to network payload sizes. Kahoot.it should consider removing dead rules from style sheets and deferring the loading of CSS not used for above-the-fold content.

URL	Transfer Size (Bytes)	Potential Savings (Bytes)
https://assets-cdn.kahoot.it/controller/v2/assets/index.83ea2bf4.css	11626	11626

Show Details

Efficiently encode images
Unoptimized images can consume more cellular data than what is necessary.

Serve images in next-gen formats
Consider JPEG 2000, JPEG XR or WebP image formats which provide better compression than PNG and JPEG.

Enable text compression
Text-based resources should be served with compression, such as gzip, deflate or brotli.

Preconnect to required origins
Resource hints, such as 'preconnect' or 'dns-prefetch', may assist in establishing early connections to important third-party origins.

Initial server response time was short — Root document took 90 ms
It is advised to keep the server response time short for the main document, because all other requests depend on it.

URL	Time Spent (Ms)
https://kahoot.it/	87.208

Show Details

Avoid multiple page redirects — Potential savings of 190 ms
Redirects can cause additional delays before the page can begin loading. Kahoot.it should avoid multiple or unnecessary page redirects.

URL	Time Spent (Ms)
http://kahoot.it/	190
https://kahoot.it/	0

Show Details

Preload key requests
Key requests can be preloaded by using '<link rel=preload>'. Kahoot.it should consider using '<link rel=preload>' to prioritize fetching resources that are currently requested later in page load.

Use video formats for animated content
Large GIFs are inefficient for delivering animated content. It is recommended to use MPEG4/WebM videos for animations and PNG/WebP for static images instead of GIF.

Remove duplicate modules in JavaScript bundles
Ensure that no duplicate JavaScript modules from bundles exist to reduce bytes consumed by network activity.

Avoid serving legacy JavaScript to modern browsers — Potential savings of 17 KiB
Polyfills and transforms enable legacy browsers to use new JavaScript features. For bundled JavaScript it is recommended to adopt a modern script deployment strategy using module/nomodule feature detection. This will reduce the amount of code shipped to modern browsers.

URL	Potential Savings (Bytes)
https://assets-cdn.kahoot.it/controller/v2/assets/vendor.c74b520c.js	17324

Show Details

Preload Largest Contentful Paint image
It is recommended to preload images used by LCP elements, to improve LCP time.

Avoids enormous network payloads — Total size was 1,155 KiB
Large network payloads can cost users money and are linked to long load times.

URL	Transfer Size (Bytes)
https://assets-cdn.kahoot.it/controller/v2/assets/vendor.c74b520c.js	614210
https://assets-cdn.kahoot.it/controller/v2/assets/index.1d4c54f9.js	503999
https://cdn.amplitude.com/libs/amplitude-5.3.0-min.gz.js	18630
https://assets-cdn.kahoot.it/controller/v2/assets/JTUHjIg1_i6t8kCHKm4532VJOt5-QNFgpCuM73w5aXo.eedb69ab.woff2	13465
https://assets-cdn.kahoot.it/controller/v2/assets/JTUHjIg1_i6t8kCHKm4532VJOt5-QNFgpCtZ6Hw5aXo.7cf1de1a.woff2	13436
https://assets-cdn.kahoot.it/controller/v2/assets/index.83ea2bf4.css	11626
https://kahoot.it/	2327
https://assets-cdn.kahoot.it/controller/v2/assets/icn_kahoot_logo.58b66a21.svg	1576
https://assets-cdn.kahoot.it/controller/v2/assets/webfonts.e8051067.css	1467
https://assets-cdn.kahoot.it/controller/v2/assets/language-picker-black.cca293f9.svg	1409

Show Details

Avoids an excessive DOM size — 41 elements
A large DOM (Document Object Model) will increase memory usage, cause longer system calculations as well as costly layout reflows.

Statistic	Element	Value
Total DOM Elements		41
Maximum DOM Depth	div.css-1fr0l2w-control > div.css-1wy0on6 > div.css-vv1fq9-indicatorContainer > img.sc-fKuJET	14
Maximum Child Elements	body	3

Show Details

Avoid chaining critical requests — 2 chains found
Below is a list of Critical Request Chains, which shows which resources are loaded with a high priority. Kahoot.it should consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

User Timing marks and measures — 1 user timing
Make use of the User Timing API to measure an app's real-world performance during key user experiences.

Name	Type	Start Time (Ms)	Duration (Ms)
sentry-tracing-init	Mark	783.079

Show Details

JavaScript execution time — 0.8 s
JavaScript (JS) execution time can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.

URL	Total CPU Time (Ms)	Script Evaluation (Ms)	Script Parse (Ms)
https://assets-cdn.kahoot.it/controller/v2/assets/index.1d4c54f9.js	841.673	788.308	3.202
Unattributable	100.9	3.285	0
https://assets-cdn.kahoot.it/controller/v2/assets/vendor.c74b520c.js	98.106	37.912	3.761

Show Details

Minimizes main-thread work — 1.1 s
Main-thread work timing can be lowered by reducing the time required for parsing, compiling and executing JS. Delivering smaller JS payloads may help with this.

Category	Time Spent (Ms)
Script Evaluation	842.53
Other	169.557
Garbage Collection	33.663
Style & Layout	23.024
Rendering	14.607
Script Parsing & Compilation	9.881
Parse HTML & CSS	7.195

Show Details

All text remains visible during webfont loads
Make use of the font-display CSS feature, which will ensure text is user-visible while webfonts are loading.

Keep request counts low and transfer sizes small — 13 requests • 1,155 KiB
It is advised to add a budgets.json file in order to set budgets for the quantity and size of page resources.

Resource Type	Requests	Transfer Size (Bytes)
Total	13	1183083
Script	3	1136839
Font	2	26901
Stylesheet	2	13093
Image	2	2985
Document	1	2327
Other	3	938
Media	0	0
Third-party	3	19315

Show Details

Minimize third-party usage — Third-party code blocked the main thread for 0 ms
It is advised to either limit, remove or delay the loading of redundant third-party code which may be significantly impacting load performance.

Third-Party	Transfer Size (Bytes)	Main-Thread Blocking Time (Ms)
SHOW DETAILS	18916	0

Show Details

Lazy load third-party resources with facades
Consider replacing third-party embeds with a facade until they are required (use lazy loading).

Largest Contentful Paint element — 1 element found
The element which was identified as the Largest Contentful Paint.

Element
Create your own kahoot for FREE at kahoot.com

Show Details

Largest Contentful Paint image was not lazily loaded
Above-the-fold images that are lazily loaded render later in the page lifecycle, which can delay the largest contentful paint.

Avoid large layout shifts — 5 elements found
Below is a list of all DOM elements that contribute to the CLS of the page.

Element	CLS Contribution
kahoot.com	0.00061711400902416
Create your own kahoot for FREE at kahoot.com	0.00016036202551407
Terms	0.00013504170569606
EN	6.0647265081802E-5
EN	5.5714233950746E-5

Show Details

Uses passive listeners to improve scrolling performance
Improve the page's scroll performance by marking touch and wheel event listeners as 'passive'.

Avoids `document.write()`
Avoid or limit the use of external scripts that are dynamically injected via 'document.write()' as users on slow connections will be delayed by tens of seconds.

Avoid long main-thread tasks — 2 long tasks found
Below is a list of the longest tasks on the main thread, which is useful when identifying the worst input delay contributors.

URL	Start Time (Ms)	Duration (Ms)
https://assets-cdn.kahoot.it/controller/v2/assets/index.1d4c54f9.js	1541	831
Unattributable	230	71

Show Details

Avoid non-composited animations
It is recommended to avoid non-composited animations which are often janky and increase CLS.

Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of kahoot.it on mobile screens.

Avoids `unload` event listeners
The 'unload' event does not fire reliably, causing issues with browser optimizations such as the Back-Forward Cache. It is recommended that 'pagehide' or 'visibilitychange' events are used instead.

Budgets

Performance budget
It is advised to keep the quantity and size of all network requests under the targets set by the provided performance budget.

Timing budget
It is advised to set a timing budget to monitor the performance of your site.

Audits

Network Requests
Below is a list of network requests that were made during page load.

URL	Protocol	Start Time (Ms)	End Time (Ms)	Transfer Size (Bytes)	Resource Size (Bytes)	Status Code	MIME Type	Resource Type
http://kahoot.it/	http/1.1	0	63.587000127882	253	0	301	text/html
https://kahoot.it/	h2	63.909000018612	150.12200013734	2327	4565	200	text/html	Document
https://assets-cdn.kahoot.it/controller/v2/assets/index.1d4c54f9.js	h2	157.06200012937	286.96000017226	503999	2202833	200	application/javascript	Script
https://assets-cdn.kahoot.it/controller/v2/assets/vendor.c74b520c.js	h2	157.68299996853	280.6049999781	614210	2567968	200	application/javascript	Script
https://assets-cdn.kahoot.it/controller/v2/assets/index.83ea2bf4.css	h2	157.84900006838	206.32300013676	11626	44954	200	text/css	Stylesheet
https://assets-cdn.kahoot.it/controller/v2/assets/webfonts.e8051067.css	h2	158.07400015183	197.97500013374	1467	7271	200	text/css	Stylesheet
https://cdn.amplitude.com/libs/amplitude-5.3.0-min.gz.js	h2	217.80400001444	242.21100006253	18630	55157	200	application/javascript	Script
https://sentry.io/api/1396500/envelope/?sentry_key=5ab18dd2256e4809906e4c5aceab2c60&sentry_version=7	http/1.1	795.40099995211	1051.9840000197	399	2	200	application/json	Fetch
https://api2.amplitude.com/	h2	1317.9780000355	1391.3790001534	286	7	200	text/html	XHR
	data	1384.6220001578	1384.7610000521	0	82	200	image/webp	Image
https://assets-cdn.kahoot.it/controller/v2/assets/language-picker-black.cca293f9.svg	h2	1385.5800000019	1411.5560001228	1409	1913	200	image/svg+xml	Image
https://assets-cdn.kahoot.it/controller/v2/assets/icn_kahoot_logo.58b66a21.svg	h2	1389.5030000713	1408.6619999725	1576	1869	200	image/svg+xml	Image
https://assets-cdn.kahoot.it/controller/v2/assets/JTUHjIg1_i6t8kCHKm4532VJOt5-QNFgpCuM73w5aXo.eedb69ab.woff2	h2	1390.5410000589	1426.9830000121	13465	12848	200	font/woff2	Font
https://assets-cdn.kahoot.it/controller/v2/assets/JTUHjIg1_i6t8kCHKm4532VJOt5-QNFgpCtZ6Hw5aXo.7cf1de1a.woff2	h2	1390.967000043	1436.2930001225	13436	12820	200	font/woff2	Font

Show Details

Network Round Trip Times — 0 ms
High Network RTT (Round Trip Times) can have a large impact on performance. Providing servers geographically closer to the user could improve performance.

Server Backend Latencies — 0 ms
High server latencies indicate the server is overloaded or has a poor backend performance.

Tasks
Below is a list of the top-level main thread tasks that executed during page load.

Start Time (Ms)	End Time (Ms)
154.548	11.102
211.282	6.312
249.378	8.486
285.093	5.199
291.287	5.069
443.862	16.481
469.717	22.229
492.006	70.937
562.956	830.766
1393.745	11.413
1408.495	8.62

Show Details

Diagnostics
Below is a collection of useful page vitals.
View Data

Metrics
Below is a collection of metrics.
View Data

Script Treemap Data
Provide as required, for treemap app.

Metrics

First Contentful Paint — 1.5 s
The time taken for the first image or text on the page to be rendered.

Speed Index — 1.8 s
The time taken for the page contents to be visibly populated.

Audits

First Meaningful Paint — 1.5 s
The time taken for the primary content of the page to be rendered.

Other

Reduce unused JavaScript — Potential savings of 513 KiB
It is advised to remove unused JavaScript in order to reduce bytes consumed by network activity.

URL	Transfer Size (Bytes)	Potential Savings (Bytes)
https://assets-cdn.kahoot.it/controller/v2/assets/vendor.c74b520c.js	614210	288943
https://assets-cdn.kahoot.it/controller/v2/assets/index.1d4c54f9.js	503999	235965

Show Details

Metrics

Total Blocking Time — 760 ms
The total blocking time is the sum of all time periods between First Contentful Paint and Time to Interactive (when task length exceeded 50ms).

Largest Contentful Paint — 2.6 s
The timing of the largest text or image that is painted.

Audits

Max Potential First Input Delay — 830 ms
Users could experience a delay when interacting with the page.

Other

Serve static assets with an efficient cache policy — 8 resources found
Kahoot.it can speed up repeat visits by increasing the cache lifetime, which is essentially how long before a cached copy expires.

URL	Cache TTL (Ms)	Transfer Size (Bytes)
https://assets-cdn.kahoot.it/controller/v2/assets/vendor.c74b520c.js	7200000	614210
https://assets-cdn.kahoot.it/controller/v2/assets/index.1d4c54f9.js	7200000	503999
https://assets-cdn.kahoot.it/controller/v2/assets/JTUHjIg1_i6t8kCHKm4532VJOt5-QNFgpCuM73w5aXo.eedb69ab.woff2	7200000	13465
https://assets-cdn.kahoot.it/controller/v2/assets/JTUHjIg1_i6t8kCHKm4532VJOt5-QNFgpCtZ6Hw5aXo.7cf1de1a.woff2	7200000	13436
https://assets-cdn.kahoot.it/controller/v2/assets/index.83ea2bf4.css	7200000	11626
https://assets-cdn.kahoot.it/controller/v2/assets/icn_kahoot_logo.58b66a21.svg	7200000	1576
https://assets-cdn.kahoot.it/controller/v2/assets/webfonts.e8051067.css	7200000	1467
https://assets-cdn.kahoot.it/controller/v2/assets/language-picker-black.cca293f9.svg	7200000	1409

Show Details

Image elements do not have explicit `width` and `height`
Reduce layout shifts and improve CLS by setting explicit width and height properties on image elements.

URL
https://assets-cdn.kahoot.it/controller/v2/assets/language-picker-black.cca293f9.svg

Show Details

Accessibility

Indicates how accessible the page is and highlights opportunities where the page can be made more accessible to users of kahoot.it. This includes details about various page attributes that can be optimized.

Passing (44)
Manual Checks (10)

Navigation

`[accesskey]` values are unique
Access keys assist users with focusing on different parts of the page. Each access key should be unique for proper navigation.

The page contains a heading, skip link, or landmark region
It is advised to provide ways to bypass repetitive content, allowing users to navigate the page efficiently.

`[id]` attributes on active, focusable elements are unique
Ensure all focusable elements have a unique id value to allow them to be visible to users of assistive technologies, like a screen reader.

Heading elements appear in a sequentially-descending order
Properly order all headers and do not skip heading levels to better the navigation and readability for users of assistive technologies, like a screen reader.

No element has a `[tabindex]` value greater than 0
Although technically valid, a tabindex value greater than 0 often creates frustrating experiences for users who rely on assistive technologies.

ARIA

`[aria-*]` attributes match their roles
Avoid mismatching 'aria-*' attributes and their 'role' value, as it invalidates the attribute.

`button`, `link`, and `menuitem` elements have accessible names
Without accessible names on elements, screen readers will default to announcing a generic name, which means your content will be less accessible to users who rely on screen readers.

`[aria-hidden="true"]` is not present on the document `<body>`
If aria-hidden=true is set on the document body, assistive technologies, like a screen reader will work inconsistently.

`[aria-hidden="true"]` elements do not contain focusable descendents
Interactive elements within an aria-hidden=true element are unavailable to users of assistive technologies, like a screen reader.

ARIA input fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when an input field does not have an accessible name specified.

ARIA `meter` elements have accessible names
Without accessible names on elements, screen readers will default to announcing a generic name, which means your content will be less accessible to users who rely on screen readers.

ARIA `progressbar` elements have accessible names
Without accessible names on elements, screen readers will default to announcing a generic name, which means your content will be less accessible to users who rely on screen readers.

`[role]`s have all required `[aria-*]` attributes
Some ARIA roles have required 'aria-*' attributes, which provide essential information about state and functionality.

Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
Some ARIA parent roles cannot perform their intended functions if specific child roles are not used.

`[role]`s are contained by their required parent element
Some ARIA child roles cannot perform their intended functions if specific parent roles are not used.

`[role]` values are valid
All ARIA roles require valid values to perform their intended functions.

ARIA toggle fields have accessible names
Generic names are announced to users of assistive technologies, like a screen reader, when a toggle field does not have an accessible name specified.

ARIA `tooltip` elements have accessible names
Without accessible names on elements, screen readers will default to announcing a generic name, which means your content will be less accessible to users who rely on screen readers.

ARIA `treeitem` elements have accessible names
Without accessible names on elements, screen readers will default to announcing a generic name, which means your content will be less accessible to users who rely on screen readers.

`[aria-*]` attributes have valid values
ARIA attributes cannot be interpreted with invalid values when used by screen readers and other assistive technologies.

`[aria-*]` attributes are valid and not misspelled
ARIA attributes cannot be interpreted with invalid names when used by screen readers and other assistive technologies.

ARIA IDs are unique
Ensure all ARIA ID values are unique to prevent elements from being overlooked by assistive technologies, like a screen reader.

Names and labels

Buttons have an accessible name
Buttons become unusable as they are announced simply as "button" when the button does not have an accessible name, when used by screen readers and other assistive technologies.

Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.

No form fields have multiple labels
Having multiple labels for form fields can be confusing to assistive technologies, like a screen reader.

`<frame>` or `<iframe>` elements have a title
Screen reader users and other assistive technology users rely on frame titles to describe the contents of frames.

Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.

`<input type="image">` elements have `[alt]` text
Input buttons with alternative text assist screen readers and other assistive technology users to understand its purpose.

Form elements have associated labels
Screen readers and other assistive technologies rely on labels to properly announce form controls.

Links have a discernible name
In order to improve the navigation for screen reader and other assistive technology users, use link text that is unique, focusable and discernible.

`<object>` elements have alternate text
It is advised that alt text is used on '<object>' elements in order to provide meaning to screen reader and other assistive technology users, as these technologies are unable to translate non-text content.

Contrast

Background and foreground colors have a sufficient contrast ratio
Many (if not most) users find low-contrast text difficult or impossible to read.

Tables and lists

`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
Screen readers and other assistive technologies may produce poor and inaccurate output when definition lists are not properly marked up.

Definition list items are wrapped in `<dl>` elements
In order for screen readers and other assistive technologies to properly announce definition list items ('<dt>' and '<dd>'), they must be wrapped in parent a '<dl>' element.

Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Use proper list structure to aid screen readers and other assistive technologies.

List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
In order for screen readers to announce list items, ensure that list items ('<li>') are contained within parent '<ul>' or '<ol>' tags.

Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that '<td>' cells using the headers attribute only refer to other cells in the same table, to improve screen reader user experience.

`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
Screen readers and other assistive technologies have features to make navigating tables easier. Ensure that table headers refer to some set of cells, to improve screen reader user experience.

Internationalization and localization

`<html>` element has a `[lang]` attribute
It is advised to provide a lang attribute so that screen readers and other assistive technologies are guaranteed to announce the page's text correctly. When not provided, the user's default language setting will be used which may cause inaccuracies.

`<html>` element has a valid value for its `[lang]` attribute
Specify a valid BCP 47 language in order to help screen readers and other assistive technologies announce text properly.

`[lang]` attributes have a valid value
Specify a valid BCP 47 language on elements in order to help screen readers and other assistive technologies announce text properly.

Best practices

The document does not use `<meta http-equiv="refresh">`
Pages that refresh automatically cause a poor user experience as focus is directed back to the top of the page unexpectedly.

`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
For users with low vision who rely on screen magnification, ensure that zooming is not disabled.

Audio and video

`<video>` elements contain a `<track>` element with `[kind="captions"]`
Kahoot.it may provide assistance to deaf or hearing-impaired users with captions on videos.

Manual Checks

The page has a logical tab order
The visual layout should be logical in its tab order and users cannot focus elements that are offscreen.

Interactive controls are keyboard focusable
Ensure that custom interactive controls are keyboard focusable and that a focus indicator is displayed.

Interactive elements indicate their purpose and state
Ensure that interactive elements (such as links and buttons) are distinguishable from non-interactive elements and that they indicate their state.

The user's focus is directed to new content added to the page
When new content (such as a dialogue) is added to the page, the user's focus should be directed to it.

User focus is not accidentally trapped in a region
Avoid focus being accidentally trapped when a user tabs in and out of controls or regions on page.

Custom controls have associated labels
Ensure that custom interactive controls have associated labels, which are provided by aria-label and aria-labelledby attributes.

Custom controls have ARIA roles
Ensure that all custom interactive controls have appropriate ARIA roles.

Visual order on the page follows DOM order
Ensure that the DOM order matches with the page's visual order, in order to improve navigation for screen readers and other assistive technologies.

Offscreen content is hidden from assistive technology
Ensure that offscreen content is hidden through the use of "display:none" styling or the aria-hidden attribute.

HTML5 landmark elements are used to improve navigation
Elements such as <main> and <nav> are recommended as they are used by screen readers and other assistive technologies to improve keyboard navigation.

Best Practices

Indicates the recommended, best practices currently in place on the page and highlights the best practices that kahoot.it should incorporate. This includes practices such as protecting pages with HTTPS.

Passing (14)
Failing (2)

Audits

Avoids requesting the geolocation permission on page load
When requesting a user's location, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.

Avoids requesting the notification permission on page load
When requesting permission to send notifications, provide context or consider tying the request to a user action to avoid confusion and mistrust from users.

Avoids front-end JavaScript libraries with known security vulnerabilities
Ensure that the use of third-party scripts is minimal and that only trusted third-party scripts are used as some may contain known security vulnerabilities which may be exploited by attackers.

Ensure CSP is effective against XSS attacks
Significantly reduce the risk of cross-site scripting attacks (XSS) by ensuring you have a strong Content Security Policy (CSP).

Description	Directive	Severity
No CSP found in enforcement mode		High

Show Details

Audits

Allows users to paste into password fields
Ensure that password inputs may be pasted into to aid in the user's ability to use password managers and improve security.

Displays images with correct aspect ratio
Ensure that image display dimensions match their natural aspect ratio.

Serves images with appropriate resolution
For maximum image clarity, ensure images have natural dimensions and are proportional to the display size and pixel ratio.

Fonts with `font-display: optional` are preloaded
It is recommended that optional fonts are preloaded.

Audits

Page has the HTML doctype
Ensure a doctype is specified to prevent the browser from switching to quirks-mode.

Properly defines charset
It is advised to declare a character encoding, optionally via a <meta> tag in the first 1024 bytes of the HTML or in the Content-Type HTTP response header.

Audits

Detected JavaScript libraries
Below is a list of all front-end JavaScript libraries that were detected on the page.

Name	Version
React
AngularJS
core-js	core-js-global@3.6.5

Show Details

Avoids deprecated APIs
Avoid deprecated APIs which will eventually be removed the browser.

No browser errors logged to the console
Below is a list of all errors logged to the console, which indicate unresolved problems on the site.

No issues in the `Issues` panel in Chrome Devtools
There may be unresolved issues logged to Chrome Devtools.

Audits

Does not use HTTPS — 1 insecure request found
Ensure that all pages are protected with HTTPS (including those that do not handle sensitive data) as HTTPS prevents tampering and passive listening on communications between the app and its users. Additionally, HTTPS is a prerequisite for HTTP/2 and many new web platform APIs.

Insecure URL	Request Resolution
http://kahoot.it/	Allowed

Show Details

Audits

Missing source maps for large first-party JavaScript
Consider deploying source maps for added benefits such as the ability to debug while in production.

URL	Map URL
https://assets-cdn.kahoot.it/controller/v2/assets/vendor.c74b520c.js	https://assets-cdn.kahoot.it/controller/v2/assets/vendor.c74b520c.js.map
https://assets-cdn.kahoot.it/controller/v2/assets/index.1d4c54f9.js	https://assets-cdn.kahoot.it/controller/v2/assets/index.1d4c54f9.js.map

Show Details

SEO

Indicates how well the page is optimized for ranking in search engines and highlights Search Engine Optimization (SEO) opportunities for kahoot.it. This includes optimizations such as providing meta data.

Passing (14)
Manual Checks (1)

Mobile Friendly

Has a `<meta name="viewport">` tag with `width` or `initial-scale`
It is advised to use a '<meta name="viewport">' tag for the optimization of kahoot.it on mobile screens.

Document uses legible font sizes
Font sizes of 12px or less are too small to most mobile users without user gestures and further action. Aim for more than 60% of page text to use font sizes greater than 12px.

Tap targets are sized appropriately
Interactive elements (such as buttons and links) should be appropriately spaced, sized and easy enough to select or tap with regard to their surrounding elements.

Content Best Practices

Document has a `<title>` element
Search engines, screen reader users and other assistive technology users rely on the title to provide an overview of the page and to help determine if the page is relevant to their search.

Document has a meta description
Meta descriptions may be used by search engines when displaying a link to the page and should concisely summarize the page's content.

Links have descriptive text
Make use of descriptive link text to assist search engines in understanding the content.

Image elements have `[alt]` attributes
Provide short and descriptive alternative text where possible on informative elements.

Document has a valid `hreflang`
Search engines can be instructed to list specific versions of a page for a given language or region through the use of hreflang links.

Document has a valid `rel=canonical`
Search engines can be suggested which URL should be shown in search results through the use of canonical links.

Document avoids plugins
The content of plugins cannot be indexed by search engines and many devices either restrict or do not support them.

Crawling and Indexing

Page has successful HTTP status code
Avoid pages with unsuccessful HTTP status codes as they may not be indexed by search engines.

Links are crawlable
Ensure that the 'href' attribute of anchor elements links to the appropriate destination. This allows for more pages of the site to be discovered by search engines.

Page isn’t blocked from indexing
Pages that cannot be crawled by search engines cannot be indexed or included in their search results. Ensure that search engines have permission to crawl all pages that should be indexed.

robots.txt is valid
Malformed robots.txt files prevent crawlers from understanding how a site wants to be crawled or indexed, which can be devastating to SEO.

PWA

Indicates how valid the aspects of a Progressive Web App (PWA) are for the page and highlights opportunities to enable/improve the PWA of kahoot.it. This includes details about web app manifests.

Installable

Web app manifest or service worker do not meet the installability requirements — 1 reason
User engagement may be increased by leveraging the browsers ability to proactively prompt users to add the app to their homescreen.

Failure reason
No manifest was fetched

Show Details

PWA Optimized

Does not register a service worker that controls page and `start_url`
A service worker is used to provide Progressive Web Apps the use of features such as working offline, the ability for the app to be added to the homescreen as well as push notifications.

Is not configured for a custom splash screen
Themed splash screens ensure a high-quality user experience at launch for app users.
View Data

Does not set a theme color for the address bar.
A theme may be applied to the browser address bar, which ideally can be made to match the site.
View Data

Does not provide a valid `apple-touch-icon`
iOS users of Progressive Web Apps will benefit from an apple touch icon, which can be defined with 'apple-touch-icon', which must point to a non-transparent 192px (or 180px) square PNG.

Manifest doesn't have a maskable icon
Maskable icons are great to ensure that images fill the entire shape when installing the app on a device.

Manual Checks

Site works cross-browser
Ensure that the Progressive Web App works correctly across every major browser.

Page transitions don't feel like they block on the network
Users perceive apps with responsive, snappy transitions as higher peforming and ensures a great user experience, even on a slow network.

Each page has a URL
Ensure that all pages are deep linkable via URL. They should also be unique for the purpose of shareability on social media.

Avg. (All Categories)

Performance

Accessibility

Best Practices

SEO

PWA

0–49 (Fail) 50–89 (Average) 90–100 (Pass)

URL: https://kahoot.it/

Updated: 4th November, 2022

5.80 seconds

First Contentful Paint (FCP)

12%

26%

62%

0.03 seconds

First Input Delay (FID)

95%

4%

1%

Simulate loading on mobile

Performance

Indicates how well the page is performing and highlights opportunities where performance may be improved for kahoot.it. This includes details about optimizing page load times which can result in a better user experience.

Metrics

Cumulative Layout Shift — 0.002
Cumulative Layout Shift is the measurement of visible elements collective movement within the viewport.
View Data