What is the maximum image size you can upload to Reddit?

Reddit accepts images up to 20 MB per file for standard post uploads. Animated GIFs and larger media are converted server-side. Keep individual frames well under the cap to avoid compression artefacts.

What image formats does Reddit support?

Reddit supports PNG, JPG, and GIF for image posts. PNG is best for graphics and text overlays, JPG for photos, and GIF for short looping animation. Reddit re-encodes uploads, so start from the highest quality source.

What aspect ratio works best in the Reddit feed?

Reddit displays feed images cropped toward a card preview, but the full image opens on click. A 1.91:1 landscape or 1:1 square preview crops cleanly, while tall 4:5 portrait images get more vertical space in the feed.

What size should a subreddit banner be?

The modern subreddit banner renders at 1920 by 384 pixels on desktop. Keep the subreddit name and key art centred because mobile crops the sides and overlays the community icon and join button.

Are these sizes the same on old and new Reddit?

New Reddit and the official apps use the dimensions listed here. Old Reddit relies on custom CSS and a different header sprite, so subreddit styling there can differ. Design for new Reddit, which is the default for most users.

Reddit Image & Video Size Cheatsheet

Email me this result

Get this tool's output sent to your inbox, plus one useful tool a week. No spam, unsubscribe any time.

Reddit renders the same upload very differently across the feed, galleries, banners, icons, and paid ads. This cheatsheet collects the recommended pixel dimensions, aspect ratios, accepted formats, and file-size caps for each Reddit placement so your media uploads clean and renders sharp.

How it works

Each row is a known Reddit surface with its target export spec. The recommended dimension is the largest size Reddit displays at full resolution before re-encoding, and the aspect ratio is what avoids unwanted cropping:

Feed / post images display from a card preview but open full-size, so a 1.91:1 or 1:1 preview crops predictably.
Subreddit banners render at 1920 × 384 with the community icon and join button overlaid on the lower-left, so keep text centred.
Profile and community icons are square and masked to a circle.

Pick a placement and the tool reports the spec you should design and export to.

Tips and notes

Always start from the highest-resolution source: Reddit re-encodes every upload, so a pre-compressed JPG degrades twice. Use PNG for any image containing text or sharp UI elements, and keep critical content inside the centre safe area on banners because mobile crops the edges. File-size caps shown are per-file; large GIFs are converted to looping video server-side.