About Ad Unit Specifications

Help redditors discover your brand on Reddit with images, carousels, and videos. You can also add rich text with ad types like free-form ads. We recommend building your creative to our specification details and recommendations to limit truncating and cropping.

Reddit reserves the right to refuse or terminate any campaign or advertisement on Reddit at any time for any reason. All ads are subject to our services agreement and policies. Learn about our ad review process.

Do you learn better by watching? Watch the next video or check out other tutorials on the Ads Formula.

Placement types

• Feed: Ads appear in Home, Popular, and community feeds across Reddit. This can be used for all ad types and may look different depending on whether the redditor is in card or compact view.
• Conversation: Ads appear on the conversation page, letting you reach redditors in the thread: diving in from their feed or joining from a web search. This can be used for all ad types. Learn about conversation ads.

Things to know

• Combine feed and conversation to show ads across all placements and maximize performance.
• Use the highest resolution that meets the ratio requirements for best quality. 
• In most cases, any aspect ratio can be used but may cause formatting issues, like black bars appearing. Follow our recommendations to limit issues.
• Text may get truncated due to factors like browser, device, and font display size.
• Use Crop image in ad setup to streamline changing the aspect ratio and cropping of images in your ad.
• We recommend experimenting with different ad types to see what resonates most with your audience. Learn more about our creative best practices.
• A thumbnail will be automatically generated based on the media in your ad for all types except for freeform. You can choose to replace this by uploading a different image.

Ad types

Secure a position in redditors’ feeds and conversations with one of our ad types, ensuring they see your message:

We recommend using both placement types for optimal reach and performance.

Ad type	Creative	Destination URL
Image	1 image	✓
Video	1 video	✓
Carousel	2-6 images	✓
Free-form	Up to 20 images, 5 videos, and 40,000 characters in the rich body text Learn more about free-form ads.

Premium Takeovers

Premium Takeovers are reserved for managed advertisers on a cost per mille (CPM) model. Unless stated otherwise, most of our takeovers follow the image and video specs. 

If you’re interested in a takeover, contact your Reddit sales representative. Not working with an ads expert? Get started today.

Want to know what your Takeover contains? Learn about our packages.

Top banner (Above the Fold)

An image ad that occupies the real estate at the top of the page.

File type	JPG or PNG
Maximum file size	150 KB
Resolution	300 x 600 px or 300 x 250 px

Sticky banner (Below the Fold)

An image ad that maintains a fixed position at the top of the page, ensuring prolonged visibility as redditors scroll through content.

File type	JPG or PNG
Maximum file size	150 KB
Resolution	300 x 250 px

Trending tile on Popular and Search pages

An image ad featured in the trending section of the Popular feed or when redditors actively search on Reddit, maximizing exposure to Reddit’s diverse and engaged audience.

Image size	Mobile: 657 x 288 px Desktop: 600 x 450 px
Thumbnail	Ratio: Landscape 4:3 Minimum recommended size: 400 x 300 px (min 220 px width)
Maximum headline	15 characters
Maximum subhead	50 characters

Promoted post on Trending page

Reach redditors exploring the latest and most popular content.

Video	File type: MP4 or MOV Ratio: 1.9:1 Frame rate max: 30 FPS
Image	File type: JPG or PNG Maximum file size: 3 MB Resolution: 1200 x 628 px
Minimum resolution (desktop)	600 x 450 px
Max thumbnail file size	500 KB
Maximum headline	300 characters
Destination URL	Required

Vertical video placement

This Premium Takeover is only available for certain takeover packages. For more details, contact your Reddit sales representative. 

A video ad only visible to mobile app users that appears between organic content in the full-screen media player. If the redditor doesn’t take any action, the video will loop. 

This ad type contains an optional destination URL, thumbnail, and call to action.

Text

Usernames over 20 characters will be truncated.

	Maximum length	Required
Headline	150 characters	✓
Destination URL	268 characters
Call to action	Choose from options

Video

File type	MP4 or MOV (ProRes not supported)
Maximum file size	1 GB
Maximum frame rate	30 FPS
Length	5 to 30 seconds Recommended: 6-15 seconds
Recommended ratio	Portrait 9:16

Acceptable ratios

Using a video with these or other ratios may cause formatting issues.

	Ratio
	Landscape 5:4
	Landscape 16:9
	Portrait 4:5
	Square 1:1

Thumbnail

File type	JPG, PNG, or GIF
Maximum file size	500 KB
Recommended ratio	Landscape 4:3
Recommended resolution	400 x 300 px
Minimum width	220 px

Video spotlight

This ad format is only available for certain takeover packages. For more details, contact your Reddit sales representative.

A video ad that takes up more vertical space within the feed. It’s only visible to mobile app users. Tapping on the video will play it in full screen. If the redditor doesn’t take any action, the video will loop. 

This ad type contains a headline, destination URL (optional), and call to action (optional). It doesn’t support comments, thumbnails, or display URLs.

Text

Usernames over 20 characters will be truncated.

	Maximum length	Required
Headline	150 characters Recommended:  ≤ 36 characters	✓
Destination URL	268 characters
Call to action	Choose from options

Video

File type	MP4 or MOV (ProRes not supported)
Maximum file size	1 GB
Maximum frame rate	30 FPS
Length	5 to 30 seconds Recommended: ≤ 15 seconds
Recommended ratio	Landscape 9:16

Acceptable ratio

Using a video with this ratio or other ratios may cause formatting issues.

	Ratio
	Landscape 16:9

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