slack.com favicon

https://slack.com/ · checked November 5, 2026

11passed
4warnings
3missing
5optional

The main favicon of slack.com is favicon-32.png, a 35×34 PNG file (702 B). We found 2 icon files, 24.6 KB in total. Google Search can use favicon.ico, an ICO file with 16, 32, 48, and 256 px images (23.9 KB). The site scores 69 out of 100: 11 passed, 4 warnings, 3 missing. Missing: SVG favicon, Apple touch icon, Web app manifest.

How it looks

Rendered from the files we found.

Slack | AI Work Platform & Productivity Tools

Browser tab · lightPassed

Slack | AI Work Platform & Productivity Tools

Browser tab · darkPassed

Slackhttps://slack.com

Slack | AI Work Platform & Productivity Tools Boost productivity and save time with Slack‌ — ‌the AI work platform for managing projects, automating workflows, and connecting teams securely. Start working smarter today.

Google searchWarning

Slack

iOS home screenMissing

Without it iOS falls back to a page screenshot or a letter on the home screen.

512

Android · maskableMissing

There are no manifest icons, so Android falls back to a screenshot or a letter.

splash

PWA install & splashMissing

No 512 px icon in the manifest, so there is no install prompt or splash screen.

All favicon files of slack.com

2 found

File	Found through	Format	Size	Weight
favicon.ico	default path	ICO	16, 32, 48, 256 px	23.9 KB
favicon-32.png	rel="icon"	PNG	35×34	702 B

Classic favicon

2 warnings

favicon.ico

Warning

GET /favicon.ico · not declared in HTML (found at the root)

Format: ICO (real)
Contains: 16 · 32 · 48 · 256
File size: 23.9 KB
HTTP: 302 → 200
Content-Type: image/vnd.microsoft.icon
Cache: 10 years

The icon URL redirects, and some crawlers and RSS readers don’t follow redirects for icons. Serve the file at its final URL.

PNG 16×16 32×32 48×48

Warning

<link id="favicon" rel="shortcut icon" href="https://a.slack-edge.com/9cc0056/img/icons/favicon-32.png" sizes="16x16 32x32 48x48" type="image/png">

Declared: 16×16 32×32 48×48
Actual: 35×34
Format: PNG
File size: 702 B
HTTP: 200
Content-Type: image/png

Declared size doesn’t match the file. Browsers may pick the wrong icon for small tabs. The icon is not square, so browsers squash or pad it.

SVG icon

1 missing

svg

SVG favicon

Missing

<link rel="icon" type="image/svg+xml" href="…"> – not found

An SVG icon stays sharp at any size and can switch colors for dark browser themes.

Apple

1 missing · 1 optional

180

Apple touch icon

Missing

<link rel="apple-touch-icon" href="…"> – not found

Without it iOS falls back to a page screenshot or a letter on the home screen.

mask

Safari pinned tab (mask-icon)

Optional

<link rel="mask-icon" href="…" color="…"> – not found

Legacy. Safari 12+ uses the regular favicon, so this is no longer required.

Web app manifest file

1 missing

json

Web app manifest

Missing

<link rel="manifest" href="…"> – not found

Android and installable web apps take their icons, name and colors from the manifest.

Google search

5 passed · 1 warning

Supported file format
ICO · favicon.ico
Square, at least 8×8 px
256×256
Larger than 48×48 px
256 px
Declared on the homepage
yes
Not blocked by robots.txt
allowed
Stable URLGoogle prefers an icon URL that doesn’t change or redirect.
1 redirect

Meta & legacy

4 optional

theme-colorColors the browser UI on mobile.
not set
theme-color for dark modemedia="(prefers-color-scheme: dark)"
not set
msapplication-TileColorWindows tiles, legacy.
not set
browserconfig.xmlWindows tiles, legacy.
not found

Delivery & performance

6 passed · 1 warning

HTTPS for every icon
2 of 2
No mixed content
0 http:// links
No broken links
0 errors
Cache headers
2 of 2 · ≥ 1 day
Total icon weight
24.6 KB
Redirects/favicon.ico → https://a.slack-edge.com/cebaa/img/ico/favicon.ico
1
Duplicate tags
none

Icon tags found in <head>

<link id="favicon" rel="shortcut icon" href="https://a.slack-edge.com/9cc0056/img/icons/favicon-32.png" sizes="16x16 32x32 48x48" type="image/png">

Questions about the slack.com favicon

Where is the slack.com favicon?

The main one is at https://a.slack-edge.com/9cc0056/img/icons/favicon-32.png. The default path, https://slack.com/favicon.ico, also returns an icon.

What size is the slack.com favicon?

favicon-32.png is 35×34. The largest raster icon on the site is favicon.ico at 256×256 px.

Can Google Search show the slack.com favicon?

The site meets Google's rules: favicon.ico is an ICO file with 16, 32, 48, and 256 px images (23.9 KB) and robots.txt allows it. Google still decides what it shows.

Does slack.com have an Apple touch icon and a maskable icon?

There is no Apple touch icon, so iOS falls back to a page screenshot or a letter. There is no readable web app manifest, so there is no maskable icon either.

More favicon reports

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