I work on OnePassApps, the team behind app.onepassapps.com. This post is a byte-level read of the brand image files our own site serves - the favicons, the touch icon, the install icons and the social card - because none of them had been measured before, and the numbers turned out to be more interesting than I expected.

Everything below was fetched over plain HTTPS from outside the browser and read byte by byte: PNG chunks decoded by hand, the ICO container directory parsed, and a SHA-256 taken of every file. The raw measurements are in content/brand-icon-assets-2026-11-04.json .

Seven files, 84,010 bytes, no duplicates

File Bytes Type Canvas

/favicon.ico 3,556 image/vnd.microsoft.icon 16, 32 and 48 px

/favicon.svg 531 image/svg+xml 32x32 viewBox

/apple-touch-icon.png 3,492 image/png 180x180

/icon-192.png 6,478 image/png 192x192

/icon-512.png 18,385 image/png 512x512

/icon-maskable-512.png 8,750 image/png 512x512

/og-image.png 42,818 image/png 1200x630

Seven files, seven different SHA-256 digests,…