Export a tweet in high resolution

A browser screenshot of a tweet is captured at your screen's pixel density, which is usually 1x or 2x. Enlarge it for a slide or a poster and it turns soft, because there is no extra detail to reveal.

Paste a link above to see the preview here.

This page renders the card from scratch at 4x, so a standard tweet exports around 2392 pixels wide with genuinely sharp glyph edges. That is enough for a full-width presentation slide or for print at 300 DPI.

Questions

How big is a 4x tweet export?
A standard 598-pixel card becomes about 2392 pixels wide, plus whatever padding you add around it.
Can I print a tweet image?
Yes. At 4x you have enough resolution for roughly 200mm wide at 300 DPI, which covers most print use.
Why not always render at the maximum scale?
Very large canvases are slow and can be dropped by mobile browsers running low on memory. 3x is the practical default.