All Web Images Videos News
Settings
Appearance
Site Icons
Font Size
Font
General
Infinite Scroll
Open Links in a New Tab
Safe Search
Search Engine Optimization Overview
83
100
Bootstrap · The most popular HTML, CSS, and JS library in the world.
Powerful, extensible, and feature-packed frontend toolkit. Build and customize with Sass, utilize prebuilt grid system and components, and bring projects to life with powerful JavaScript plugins.
https://getbootstrap.com/
2 high issues
6.1%
2 medium issues
6.1%
3 low issues
9.1%
26 tests passed
78.8%
0.08 seconds
15.28 kB
8 resources
Secure
Seo
Title
The title tag must be between 1 and 60 characters.
The current title has 68 characters.
Meta description
The meta description tag is good.
Powerful, extensible, and feature-packed frontend toolkit. Build and customize with Sass, utilize prebuilt grid system and components, and bring projects to life with powerful JavaScript plugins.
Headings
The headings are properly set.
  1. Build fast, responsive sites with Bootstrap
  1. Get started any way you want
  2. Customize everything with Sass
  3. Build and extend in real-time with CSS variables
  4. Components, meet the Utility API
  5. Powerful JavaScript plugins without jQuery
  6. Personalize it with Bootstrap Icons
  7. Make it yours with official Bootstrap Themes
  1. Install via package manager
  2. Include via CDN
  3. Include all of Bootstrap’s Sass
  4. Include what you need
  5. Using CSS variables
  6. Customizing via CSS variables
  7. Data attribute API
  8. Comprehensive set of plugins
  1. Read our getting started guides
  2. Alert
  3. Button
  4. Carousel
  5. Collapse
  6. Dropdown
  7. Modal
  8. Offcanvas
  9. Popover
  10. Scrollspy
  11. Tab
  12. Toast
  13. Tooltip
  1. Bootstrap
  2. Links
  3. Guides
  4. Projects
  5. Community
  1. v5 releases
  2. Previous releases
  3. Quickly customize components
Content keywords
The content has relevant keywords.
bootstrapthehtmlcssandjslibraryintheworld
Image keywords
There are 3 images with missing alt attributes.
  1. https://getbootstrap.com/docs/5.2/assets/img/webpack.svg
  2. https://getbootstrap.com/docs/5.2/assets/img/parcel.png
  3. https://getbootstrap.com/docs/5.2/assets/img/vite.svg
SEO friendly URL
The URL is SEO friendly.
https://getbootstrap.com/
404 page
The website has 404 error pages.
https://getbootstrap.com/404-3eeacf4c713f5624da7b6dc20911a4bf
Robots.txt
The webpage can be accessed by search engines.
Noindex
The webpage does not have a noindex tag set.
In-page links
The number of links on the webpage is okay.
Language
The webpage has the language declared.
en
Favicon
The webpage has a favicon.
https://getbootstrap.com/docs/5.2/assets/img/favicons/favicon.ico
Performance
Text compression
The HTML file is compressed.
Load time
The webpage loaded in 0.08 seconds.
Page size
The size of the HTML webpage is 15,280.00.
HTTP requests
There are fewer than 8 HTTP requests on the webpage.
  1. https://cdn.usefathom.com/script.js
  2. https://www.google-analytics.com/analytics.js
  3. https://cdn.carbonads.com/carbon.js?serve=CKYIKKJL&placement=getbootstrapcom
  4. https://getbootstrap.com/docs/5.2/dist/js/bootstrap.bundle.min.js
  5. https://getbootstrap.com/docs/5.2/assets/js/docs.min.js
  1. https://getbootstrap.com/docs/5.2/dist/css/bootstrap.min.css
  2. https://getbootstrap.com/docs/5.2/assets/css/docs.css
  1. https://getbootstrap.com/docs/5.2/assets/brand/bootstrap-logo-shadow.png
Image format
There are 4 images that are not using the AVIF, WebP format.
  1. https://getbootstrap.com/docs/5.2/assets/brand/bootstrap-logo-shadow.png
  2. https://getbootstrap.com/docs/5.2/assets/img/parcel.png
  3. https://getbootstrap.com/docs/5.2/assets/img/bootstrap-icons.png
  4. https://getbootstrap.com/docs/5.2/assets/img/bootstrap-themes.png
JavaScript defer
The are 4 javascript resources without the defer attribute.
  1. https://www.google-analytics.com/analytics.js
  2. https://cdn.carbonads.com/carbon.js?serve=CKYIKKJL&placement=getbootstrapcom
  3. https://getbootstrap.com/docs/5.2/dist/js/bootstrap.bundle.min.js
  4. https://getbootstrap.com/docs/5.2/assets/js/docs.min.js
DOM size
The DOM size is optimal.
The HTML file has 1007 DOM nodes.
Security
HTTPS encryption
The webpage uses HTTPS encryption.
The HTML file has https://getbootstrap.com/ DOM nodes.
Mixed content
There are no mixed content resources on the webpage.
Server signature
The webpage has a public server signature.
cloudflare
Unsafe cross-origin links
The webpage does not have unsafe cross-origin links.
Plaintext email
The webpage contains plaintext emails.
  1. bootstrap-icons@2x.png
  2. bootstrap-themes@2x.png
Miscellaneous
Structured data
The webpage has structured data.
      Meta viewport
      The webpage has a meta viewport tag set.
      width=device-width, initial-scale=1
      Character set
      The webpage has a charset value set.
      utf-8
      Sitemap
      The website has sitemaps.
      1. https://getbootstrap.com/sitemap.xml
      Social
      The webpage has 1 social links.
      Content length
      The webpage has 1,303 words.
      Text to HTML ratio
      The text to HTML ratio is 13%.
      Inline CSS
      The webpage contains inline CSS code.
      1. width: 1.5rem;
      2. --bg-rgb: var(--bd-violet-rgb);
      3. --bg-rgb: var(--bs-primary-rgb);
      4. --bg-rgb: var(--bd-pink-rgb);
      5. --bg-rgb: var(--bs-danger-rgb);
      6. --bg-rgb: var(--bs-info-rgb);
      7. --bg-rgb: var(--bs-warning-rgb);
      8. --bg-rgb: var(--bd-teal-rgb);
      9. --bg-rgb: var(--bd-violet-rgb);
      Deprecated HTML
      There are no deprecated HTML tags on the webpage.