Slack Help Center

Mobile Usability



Mobile Speed



Last tested: 2017-08-29

Rescan Mobile Usability: 96/100 Mobile Usability Test Quick Overview

Size content to viewport

The page content is too wide for the viewport, forcing the user to scroll horizontally. Size the page content to the viewport to provide a better user experience.
The page content is 414 CSS pixels wide, but the viewport is only 412 CSS pixels wide. The following elements fall outside the viewport:
The element <div class="intro_card_container">Using Slack…e all articles</div> falls outside the viewport.
Size tap targets appropriately

Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.
The following tap targets are close to other nearby tap targets and may need additional spacing around them.
The tap target <a href="/hc/en-us/articles/202288908">message formatting</a> and 1 others are close to other tap targets. Mobile Speed: 51/100 Mobile Speed Test Quick Overview

Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 5 blocking script resources and 4 blocking CSS resources. This causes a delay in rendering your page.…zendesk-min.js?aug14_1…d=1067416&locale=en-us
Optimize CSS Delivery of the following:…94386797415147e7e1.css…d=1067416&locale=en-us,400,700,900
Avoid landing page redirects

Your page has 3 redirects. Redirects introduce additional delays before the page can be loaded.
Avoid landing page redirects for the following chain of redirected URLs.
Optimize images

Properly formatting and compressing images can save many bytes of data.
Optimize the following images to reduce their size by 149.2KiB (39% reduction).
Compressing…attern_transparent.png could save 98.2KiB (33% reduction).
Compressing…admin-illustration.png could save 18.3KiB (42% reduction).
Compressing…/icon_search_black.png could save 14.9KiB (93% reduction).
Compressing…/icon_search_white.png could save 14.6KiB (93% reduction).
Compressing could save 1KiB (21% reduction).
Compressing…con_quick_switcher.png could save 811B (48% reduction).
Compressing could save 757B (40% reduction).
Compressing…86//icon_magicwand.png could save 624B (44% reduction).
Minify JavaScript

Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.
Minify JavaScript for the following resources to reduce their size by 77.7KiB (42% reduction).
Minifying could save 39.1KiB (50% reduction) after compression.
Minifying could save 38.5KiB (36% reduction) after compression.
Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.
Leverage browser caching for the following cacheable resources:…94386797415147e7e1.css (expiration not specified) (expiration not specified) (expiration not specified)…47d34e45d9ca56b553d.js (expiration not specified) (60 seconds) (15 minutes) (60 minutes) (2 hours)
Minify CSS

Compacting CSS code can save many bytes of data and speed up download and parse times.
Minify CSS for the following resources to reduce their size by 7.7KiB (15% reduction).
Minifying…d=1067416&locale=en-us could save 3.7KiB (14% reduction) after compression.
Minifying…94386797415147e7e1.css could save 2.7KiB (14% reduction) after compression.
Minifying could save 1.3KiB (22% reduction) after compression. Mobile Resources

Total Resources54
Number of Hosts17
Static Resources35
JavaScript Resources22
CSS Resources5 Mobile Resource Breakdown