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Logo Link URLs return image bytes directly. Pair them with Excel’s IMAGE() function and any cell becomes a logo. Logo Link in Microsoft Excel
The IMAGE() function is available in Excel for Microsoft 365, Excel for Microsoft 365 for Mac, Excel for the web, Excel 2024, Excel 2024 for Mac, Excel for iPhone, and Excel for Android phones. It is not available in older perpetual-license desktop Excel versions.

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Prerequisites

  • A Context.dev account with a Logo Link publicClientId (prefix brandLL_). Copy it from the Logo Link dashboard.

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Basic usage

Use IMAGE() with a Logo Link URL: 
=IMAGE("https://logos.context.dev/?publicClientId=brandLL_xxx&domain=github.com")

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Dynamic domains

Reference a cell containing the domain instead of hardcoding it. If cell A2 holds github.com: 
=IMAGE("https://logos.context.dev/?publicClientId=brandLL_xxx&domain=" & A2)
Drag the formula down a column to fetch logos for an entire list of domains.

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Syntax

From Microsoft’s IMAGE() reference: 
=IMAGE(source, [alt_text], [sizing], [height], [width])
ArgumentPurpose
sourceURL of the image (must use https). Required.
alt_textAlternative text for accessibility. Optional.
sizingImage sizing mode (see below). Optional.
height, widthCustom dimensions in pixels. Used only with sizing = 3.

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Sizing modes

ValueBehavior
0Fit the image in the cell and maintain aspect ratio (default)
1Fill the cell with the image; ignore aspect ratio
2Use the original image size; may exceed the cell boundary
3Customize the image size with height and width
Example with alt text and fill mode: 
=IMAGE("https://logos.context.dev/?publicClientId=brandLL_xxx&domain=github.com", "GitHub logo", 1)
Adjust row height and column width so logos display at a reasonable size. Sizing mode 0 (fit and maintain aspect) usually looks best. Icons and monograms are square; wordmarks may be wider.

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Fallbacks

If a logo isn’t published for a domain, Logo Link automatically returns a generated monogram based on the domain name. Note that the monogram is an SVG, which Excel’s IMAGE() can’t render (see Limitations), so for unknown domains the cell may stay blank rather than show the fallback.

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Limitations

  • No SVG. Excel’s IMAGE() supports BMP, JPG/JPEG, GIF, TIFF, PNG, ICO, and WEBP (WEBP is unsupported on Web and Android). It does not render SVG. Most Logo Link responses for known brands are PNG, but the monogram fallback is SVG and won’t render, so pass a known domain when you can.
  • HTTPS only. IMAGE() requires https. Logo Link is https://logos.context.dev/..., so this is already met.
  • No redirected URLs. If the source URL redirects, Excel blocks it for security. Logo Link serves the image bytes directly, no redirects.
  • No auth-gated URLs. If the source URL requires authentication, the image doesn’t render. Logo Link’s publicClientId is a query-string parameter, not auth, so it works.

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Next steps

Google Sheets

Same workflow in Google Sheets with the IMAGE() formula.

Logo Link reference

All Logo Link URL options and the publicClientId setup.

Zapier integration

Programmatic enrichment for spreadsheet rows beyond logos.

Logo Link dashboard

Grab your publicClientId and lock it to your own domain.