Required structure
The document must be valid XML with an SVG root. Set version="1.2" and baseProfile="tiny-ps", remove root x and y attributes, and include a title that identifies the brand.
- No script or animation elements.
- No external links, fonts, stylesheets, or resources.
- No embedded raster <image> elements.
- No interactive foreignObject or iframe content.
Design for unpredictable crops
Mailbox providers can render an indicator as a circle, rounded square, or other mask. Use a square viewBox, centre important artwork, and leave generous space around the edges.
- A solid background is more reliable than transparency.
- Outlined text is safer than relying on a font.
- Keep contrast strong at small inbox sizes.
Gmail compatibility details
Google recommends absolute width and height values of at least 96 pixels, a file no larger than 32 KB, a centred mark, and a useful description element.
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