Medium Article Header Image Size (Retina)
Your header image looks blurry on mobile? You aren't accounting for pixel density.
1
Width Matters
Medium displays images at up to 1400px wide on desktop. To support Retina (2x) screens, upload an image that is **2500px wide**.
2
Alt Text
Always add Alt Text in the Medium editor. It is a huge SEO signal for your article.
3
Caption Credit
Medium requires Unsplash citations unless you own the image. If it is your photo, add 'Image by Author' in the caption.