Reddit Ads image & ad sizes

Social High confidence — confirmed in the official documentation. Verified 2026-10

Drop a creative or type a size — see every placement it fits

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10placements
6layouts to produce
5aspect ratios

Image 9 Video 1

Official documentation

Size map

Every frame is drawn to the same scale · largest 1920×1080

1200×1500 8
1080×1440 3
1080×1350 2
1200×1200 7 9
1920×1080 4
1440×1080 5
1080×1080 1
816×1024 10
400×300 6

Numbers match the rows of the size table

All Reddit Ads sizes

Placement	Ratio	Max weight	Formats	Video	Text limits	Confidence
1. Image Ad / Promoted Post - Square (1:1) Square	1:1	3 MB	JPGPNGGIF	—	1	High confidence — confirmed in the official documentation
Notes & best practice Square 1:1 and portrait 4:5 are recommended ratios for in-feed promoted posts. Minimum width is 600px (some sources cite a 400x300 floor). Keep key visuals in the top two-thirds; leave the bottom clear for the engagement bar. GIFs are accepted up to 3 MB. Full specification Size (px) Ratio 1:1 Max weight 3 MB Formats JPG, PNG, GIF Text limits Headline300chars High confidence — confirmed in the official documentation Source: business.reddithelp.com (opens in a new tab)
2. Image Ad / Promoted Post - Portrait (4:5) Vertical / Portrait	4:5	3 MB	JPGPNGGIF	—	1	High confidence — confirmed in the official documentation
Notes & best practice Portrait 4:5 is the recommended format for mobile feeds. Recommended resolutions are 1080x1350 and 1200x1500. Maximum file weight is 3 MB, and the minimum width is 600px. Full specification Size (px) Ratio 4:5 Max weight 3 MB Formats JPG, PNG, GIF Text limits Headline300chars High confidence — confirmed in the official documentation Source: business.reddithelp.com (opens in a new tab)
3. Image Ad / Promoted Post - Portrait (3:4) Vertical / Portrait	3:4	3 MB	JPGPNGGIF	—	1	High confidence — confirmed in the official documentation
Notes & best practice Portrait 3:4 image for in-feed promoted posts. Recommended resolution is 1080x1440 px; Reddit lists 3:4 as a recommended mobile ratio and an acceptable desktop ratio. Maximum file weight is 3 MB. Any ratio is accepted, but unlisted ratios may be letterboxed. Full specification Size (px) Ratio 3:4 Max weight 3 MB Formats JPG, PNG, GIF Text limits Headline300chars High confidence — confirmed in the official documentation Source: business.reddithelp.com (opens in a new tab)
4. Image Ad / Promoted Post - Landscape (16:9) Landscape	16:9	3 MB	JPGPNGGIF	—	1	High confidence — confirmed in the official documentation
Notes & best practice Landscape 16:9 and 4:3 (1440x1080) formats are supported. Maximum file weight is 3 MB. Full specification Size (px) Ratio 16:9 Max weight 3 MB Formats JPG, PNG, GIF Text limits Headline300chars High confidence — confirmed in the official documentation Source: business.reddithelp.com (opens in a new tab)
5. Image Ad / Promoted Post - Landscape (4:3) Landscape	4:3	3 MB	JPGPNGGIF	—	1	High confidence — confirmed in the official documentation
Notes & best practice The 4:3 (1440x1080) ratio is supported for desktop and mobile feeds. Maximum file weight is 3 MB. Full specification Size (px) Ratio 4:3 Max weight 3 MB Formats JPG, PNG, GIF Text limits Headline300chars High confidence — confirmed in the official documentation Source: business.reddithelp.com (opens in a new tab)
6. Image/Video Ad Thumbnail (classic-mode) Other	4:3	3 MB	JPGPNGGIF	—	—	High confidence — confirmed in the official documentation
Notes & best practice Optional small thumbnail shown in conversation placement and compact view. Recommended size is 400x300 (4:3); 300x300 (1:1) and 400x225 (16:9) are also accepted. Maximum weight is 3 MB, and GIFs are converted to a still image. Video ads use a separate thumbnail that should match the video's aspect ratio. Thumbnails are auto-generated from the media for most ad types, but free-form ads show no media in feeds unless you upload one. Full specification Size (px) Ratio 4:3 Max weight 3 MB Formats JPG, PNG, GIF High confidence — confirmed in the official documentation Source: business.reddithelp.com (opens in a new tab)
7. Video Ad (Promoted Video) Video	1:1	1 GB	JPGPNGGIF	MP4MOV Up to 15 minutes	1	High confidence — confirmed in the official documentation
Notes & best practice MP4 or MOV only. ProRes is not supported. Max frame rate is 30 FPS. Minimum resolution is 1080x1080. Recommended ratios are 4:5 or 1:1 for mobile, and 16:9 or 4:3 for desktop. Thumbnails can be auto-generated or custom JPG, PNG, or GIF up to 3 MB. Full specification Size (px) Ratio 1:1 (also 4:5, 4:3, 16:9 supported) Max weight 1 GB (512 MB recommended) Cover / thumbnail formats JPG, PNG, GIF Formats · Video MP4, MOV Max duration Up to 15 minutes (5-30 seconds recommended; minimum 2 seconds) Max video 1 GB (under 512 MB recommended to avoid encoding issues) Text limits Headline300chars High confidence — confirmed in the official documentation Source: business.reddithelp.com (opens in a new tab)
8. Carousel Ad Card Carousel	4:5	20 MB per image3 MB GIFs	JPGPNGGIF	—	2	High confidence — confirmed in the official documentation
Notes & best practice Use 2 to 6 cards per carousel. Using the same aspect ratio on all cards is strongly recommended. Recommended formats are 4:5 portrait (1200x1500), 4:3 landscape (1440x1080), 16:9 (1920x1080), and 1:1 square (1200x1200). Per-card image weight is up to 20 MB. Animated GIF cards are capped at 3 MB. Each card supports its own 50-character caption. Thumbnails are auto-generated from the media. Full specification Size (px) Ratio 4:5 (also 1:1, 4:3, 16:9; same ratio on all cards recommended) Max weight 20 MB per image (GIFs limited to 3 MB) Formats JPG, PNG, GIF Text limits Headline300chars Caption50chars High confidence — confirmed in the official documentation Source: business.reddithelp.com (opens in a new tab)
9. Free-form Ad (Rich Text Post) Other	1:1	10 MB per image1 GB per video	JPGPNGGIF	MP4MOV 5-30 seconds recommended	3	High confidence — confirmed in the official documentation
Notes & best practice This rich-text ad unit features a headline and a long-form rich body. Tapping the ad opens the full post. It supports up to 20 images (JPG, PNG, or GIF, max 10 MB each) and up to 5 videos (MP4 or MOV, max 1 GB each). Free-form ads do not auto-generate a thumbnail. Upload a JPG or PNG up to 3 MB, with 400x300 or 300x300 recommended; without one, the ad shows no media in feeds. Build free-form ads in Ads Manager instead of promoting an existing post to ensure thumbnails render correctly. Full specification Size (px) Ratio 1:1 (embedded media; varies) Max weight 10 MB per image; 1 GB per video Formats JPG, PNG, GIF Formats · Video MP4, MOV Max duration 5-30 seconds recommended Max video 1 GB per video (50-100 MB recommended) Text limits Headline300chars Body40000chars Caption50chars High confidence — confirmed in the official documentation Source: business.reddithelp.com (opens in a new tab)
10. Interactive Ad (Quiz, Poll, Countdown) Vertical / Portrait	4:5	3 MB	JPGPNG	—	1	High confidence — confirmed in the official documentation
Notes & best practice Feed-only ad that runs a quiz, poll, or countdown app inside the post. The mobile background is 816x1024 px (4:5) and is also used on desktop unless you add a 1400x1024 px desktop background, which Reddit labels 4:3. Images are JPG or PNG up to 3 MB; the optional logo is 512x512 px and is cropped to a circle. A solid color can replace the background image. Full specification Size (px) Ratio 4:5 Max weight 3 MB Formats JPG, PNG Text limits Headline300chars High confidence — confirmed in the official documentation Source: business.reddithelp.com (opens in a new tab)

High confidence — confirmed in the official documentation Medium confidence — verified against reputable sources Lower confidence — changes frequently, verify before launch shortened, full wording in the row details

Minimum creative kit

Layouts: 6 · placements covered: 10 of 10

Layout	Max weight	Formats	Covers
4:5Image	3 MBfor 1080×1350 px	JPGPNG	Image Ad / Promoted Post - Portrait (4:5)Carousel Ad Card Interactive Ad (Quiz, Poll, Countdown)
1:1Image	3 MBfor 1080×1080 px	JPGPNGGIF	Image Ad / Promoted Post - Square (1:1)Free-form Ad (Rich Text Post)
4:3Image	3 MB	JPGPNGGIF	Image Ad / Promoted Post - Landscape (4:3)Image/Video Ad Thumbnail (classic-mode)
3:4Image	3 MB	JPGPNGGIF	Image Ad / Promoted Post - Portrait (3:4)
16:9Image	3 MB	JPGPNGGIF	Image Ad / Promoted Post - Landscape (16:9)
1:1Video	1 GB	MP4MOV	Video Ad (Promoted Video)

Text limits

Placements with limits: 9 of 10 · characters unless noted

Placement	Headline	Caption	Body
Image Ad / Promoted Post - Square (1:1)	300	—	—
Image Ad / Promoted Post - Portrait (4:5)	300	—	—
Image Ad / Promoted Post - Portrait (3:4)	300	—	—
Image Ad / Promoted Post - Landscape (16:9)	300	—	—
Image Ad / Promoted Post - Landscape (4:3)	300	—	—
Video Ad (Promoted Video)	300	—	—
Carousel Ad Card	300	50	—
Free-form Ad (Rich Text Post)	300	50	40000
Interactive Ad (Quiz, Poll, Countdown)	300	—	—

Video specs

Placements: 2 of 10

Placement	Size (px)	Formats	Max duration	Max video
Video Ad (Promoted Video)	1200×1200	MP4, MOV	Up to 15 minutes (5-30 seconds recommended; minimum 2 seconds)	1 GB (under 512 MB recommended to avoid encoding issues)
Free-form Ad (Rich Text Post)	1200×1200	MP4, MOV	5-30 seconds recommended	1 GB per video (50-100 MB recommended)