New Reddit card dimensions
New Reddit (redesign and mobile apps) shows link posts as cards with a large image above the title. The card image area is roughly 1.91:1 at about 600px wide. 1200 x 630 pixels is the target size.
Images smaller than 200 x 200 pixels may not display at all – you’ll get a text-only post.
Old Reddit thumbnail dimensions
Old Reddit (old.reddit.com) shows link posts as a list with small square thumbnails:
- List view: 70 x 70 pixels
- Expanded view: 140 x 140 pixels
Both views center-crop to a square. Keep your focal point centered if old Reddit matters to you.
File size limits
Embedly enforces a max of about 8MB, but larger images risk timeout failures. Keep OG images under 1MB.
Supported formats
- JPEG – best for photos, smallest files
- PNG – good for graphics, screenshots, text overlays
- GIF – only the first frame is used (no animation in previews)
- WebP – works through Embedly but JPEG/PNG are more reliable
Center-crop behavior
Both old and new Reddit center-crop images. New Reddit crops top and bottom to fit the 1.91:1 card. Old Reddit crops to a square. Keep key content (title text, logo, product shot) centered in your image and away from edges.
Multiple og:image tags
Embedly uses the first og:image tag it encounters. If your CMS or template injects an unintended og:image before yours, that one wins. When no OG image is present, Embedly ranks page body images by pixel dimensions and DOM position.