Get the ratio right first
The aspect ratio is the shape of the image, width to height, like 4:5. The size is how many pixels fill that shape, like 1080 × 1350. When the ratio matches, a platform scales your image down without cropping it. When it doesn’t, the platform crops it or adds bars, and it decides where.
Give text a few extra pixels
Every platform resizes and recompresses what you upload. Small text in a screenshot is the first thing to go soft. Exporting at 2× the listed size, at the same ratio, gives the platform more detail to keep when it resizes. The listed sizes are the floor, not the ceiling.
Keep the important part away from the edges
Profile photos on X, Instagram and Facebook are shown as circles, so the corners disappear. Cover and header photos are cropped differently on phones and on desktop. Since 2025, Instagram’s profile grid shows posts cropped to 3:4. Put what matters in the middle and leave the edges for background.
How this list stays current
The sizes on this page are read from the presets in the Popshot editor when the site is built, not typed by hand. When a preset changes, the page changes with it, and the date at the top updates. Platforms do change their guidance, and some now publish a minimum rather than a single size. Where that’s the case, there’s a note.
Posting the same image everywhere? Resizing one design for each platform is the slow part. Popshot Pro exports your design for LinkedIn, X, Instagram, Product Hunt and link previews in one download, each laid out for its size. See how one-download export works