duolingo.com favicon

https://www.duolingo.com/ · 1 redirect · checked November 5, 2026

22passed
2warnings
3missing
6optional

The main favicon of duolingo.com is favicon.ico, an ICO file with 16, 32, and 48 px images (15.0 KB). We found 4 icon files, 73.0 KB in total. Google Search can use duolingo-touch-icon2.png, a 180×180 PNG file (10.9 KB). The site scores 81 out of 100: 22 passed, 2 warnings, 3 missing. Missing: favicon.ico, SVG favicon, maskable manifest icon.

How it looks

Rendered from the files we found.

Duolingo

Browser tab · lightPassed

Duolingo

Browser tab · darkPassed

Duolingohttps://www.duolingo.com

Duolingo Duolingo is the world's most popular way to learn a language. It's 100% free, fun and science-based. Practice online on duolingo.com or on the apps!

Google searchPassed

Duolingo

iOS home screenWarning

iOS fills transparent areas with black. Give the icon a solid background.

Android · maskableMissing

There is no maskable icon, so Android shrinks the regular one onto a white circle.

Duolingo

PWA install & splashPassed

All favicon files of duolingo.com

4 found

File	Found through	Format	Size	Weight
duolingo-touch-icon2.png	rel="apple-touch-icon"	PNG	180×180	10.9 KB
favicon.ico	rel="icon"	ICO	16, 32, 48 px	15.0 KB
pwa-icon-circle-192.png	manifest	PNG	192×192	11.8 KB
pwa-icon-circle-512.png	manifest	PNG	512×512	35.3 KB

Classic favicon

1 passed · 1 missing

ico

favicon.ico

Missing

GET /favicon.ico – not found

HTTP: 200

Browsers, RSS readers and many crawlers request /favicon.ico even when the HTML declares other icons. The URL does not return an image (text/html).

ICO

Passed

<link rel="icon" href="https://d35aaqx5ub95lt.cloudfront.net/favicon.ico">

Declared: no sizes
Actual: 16 · 32 · 48
Format: ICO
File size: 15.0 KB
HTTP: 200
Content-Type: image/vnd.microsoft.icon

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 warning · 1 optional

Apple touch icon

Warning

<link rel="apple-touch-icon" href="https://d35aaqx5ub95lt.cloudfront.net/images/duolingo-touch-icon2.png">

Declared: no sizes
Actual: 180×180
Recommended: 180×180
Background: transparent
File size: 10.9 KB
HTTP: 200

iOS fills transparent areas with black. Give the icon a solid background.

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 passed

json

manifest.json

Passed

<link rel="manifest" href="/manifest.json">

HTTP: 200
Content-Type: application/json
JSON: valid
File size: 488 B
Same origin: yes
Cache: no-cache

Manifest fields

7 passed · 1 warning · 1 missing · 1 optional

name
Duolingo
short_name
Duolingo
start_url
/?utm_source=pwa_launch
display
standalone
theme_colorColors the title bar of the installed app.
not set
background_color
#ffffff
icons · 192×192
PNG · 11.8 KB · 200
icons · 512×512
PNG · 35.3 KB · 200
icons · purpose: maskableWithout it Android shrinks your icon onto a white circle.
not found
id
not set

Google search

6 passed

Supported file format
PNG · duolingo-touch-icon2.png
Square, at least 8×8 px
180×180
Larger than 48×48 px
180 px
Declared on the homepage
yes
Not blocked by robots.txt
allowed
Stable URL
no redirects

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

7 passed

HTTPS for every icon
4 of 4
No mixed content
0 http:// links
No broken links
0 errors
Cache headers
4 of 4 · ≥ 1 day
Total icon weight
73.0 KB
Redirects
0
Duplicate tags
none

Icon tags found in <head>

<link rel="apple-touch-icon" href="https://d35aaqx5ub95lt.cloudfront.net/images/duolingo-touch-icon2.png">
<link rel="icon" href="https://d35aaqx5ub95lt.cloudfront.net/favicon.ico">
<link rel="manifest" href="/manifest.json">

Questions about the duolingo.com favicon

Where is the duolingo.com favicon?

The main one is at https://d35aaqx5ub95lt.cloudfront.net/favicon.ico.

What size is the duolingo.com favicon?

favicon.ico is 16, 32, 48 px. The largest raster icon on the site is pwa-icon-circle-512.png at 512×512 px.

Can Google Search show the duolingo.com favicon?

The site meets Google's rules: duolingo-touch-icon2.png is a 180×180 PNG file (10.9 KB) and robots.txt allows it. Google still decides what it shows.

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

The Apple touch icon is 180×180, with transparent areas that iOS turns black. The manifest has no maskable icon, so Android shrinks the regular one onto a white circle.

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