Prepare Images for Reddit with the Right Aspect Ratio

What aspect ratio should you use for Reddit?

There is no single mandatory Reddit aspect ratio. The best choice depends on where the image appears: feed previews and many desktop views favor a 4:5 ratio, while 1:1 and 16:9 are also widely supported. A 4:5 ratio often provides the most useful preview without excessive cropping on mobile and desktop feeds.

For posts intended primarily for mobile browsing, a vertical 4:5 or 3:4 image can use more of the visible preview area. For clean grid placement or community icons, a square 1:1 image is simpler. The key constraint is not Reddit's absolute requirement but how the platform crops or letterboxes the image in different views.

Recommended dimensions

For a 4:5 ratio, a practical export size is 1080 by 1350 pixels. For a square image, 1080 by 1080 pixels is common. A 16:9 image can be exported at 1600 by 900 or 1920 by 1080 pixels. These dimensions are large enough for clear online display while keeping file sizes manageable.

Steps to resize online

Start by opening an online image resizing tool and uploading the original image. Choose the target aspect ratio or enter custom width and height values. Select a crop or fit mode that preserves the important part of the image, apply the change, and export a standard format such as JPEG or PNG.

• Check the current dimensions of the original image.
• Choose a target ratio such as 4:5, 1:1, or 16:9.
• Crop rather than stretch when the original ratio differs.
• Export at the intended width and height.
• Save a JPEG for most photos or a PNG when transparency is required.

Resampling quality

When reducing images, use a tool that applies proper resampling rather than simple nearest-neighbor scaling. This helps preserve edges and text clarity. Avoid repeatedly saving a JPEG at low quality, since each export can introduce additional compression artifacts.

What may still vary

Reddit's display treatment can differ between the old interface, new interface, mobile apps, and embedded previews. A image optimized for one view may still be cropped in another. Because platform behavior can change without notice, treat these dimensions as reliable starting points rather than a fixed guarantee across every interface.