Reddit Ads vs X (Twitter) image sizes 2026

One file works on both for 0 formats, one layout with two exports for 1, and 3 need their own layout. 4 of 11 layouts below serve both platforms.

Reddit AdsvsX (Twitter)

Check one creative against Reddit Ads and X (Twitter)

Drag & drop your creative or click to choose a file Checked against 25 placements on both platforms

Or type a size

Nothing is uploaded or saved — the check runs entirely in your browser.

Format by format

The main size of each format on both platforms, and whether one file covers both.

Placement	Reddit Ads	X (Twitter)	For both
Square	Image Ad / Promoted Post - Square (1:1) 1:13 MB JPGPNGGIF	Image Ad - Square (1:1) 1:15 MB JPGPNGWEBPGIF	One layout, two exports
Vertical / Portrait	Image Ad / Promoted Post - Portrait (3:4) 3:43 MB JPGPNGGIF	Image Ad - Portrait (4:5) 4:55 MB JPGPNGGIF	Different layouts
Landscape	Image Ad / Promoted Post - Landscape (16:9) 16:93 MB JPGPNGGIF	Image Ad - Landscape (1.91:1) 1.91:15 MB JPGPNGWEBPGIF	Different layouts
Carousel	Carousel Ad Card 4:5 (also 1:1, 4:3, 16:9; same ratio on all cards recommended)20 MB JPGPNGGIF	Carousel Ad Card 1:120 MB JPGPNG	Different layouts
Profile picture	—	Profile Picture / Avatar 1:12 MB JPGPNGGIF	Only on X (Twitter)
Cover / Header	—	Profile Header / Banner 3:12 MB JPGPNGGIF	Only on X (Twitter)
Display banner	—	Spotlight Takeover (formerly Trend Takeover+) 16:95 MB JPGPNGGIF	Only on X (Twitter)

One creative set for both

Layouts: 11 · used on both platforms: 4

1:1Image Both

Master size Export sizes Max weight3 MBReddit Ads FormatsJPGPNG

Reddit Ads Image Ad / Promoted Post - Square (1:1) 1080×1080·Free-form Ad (Rich Text Post) 1200×1200

X (Twitter) Image Ad - Square (1:1) 1200×1200·Carousel Ad Card 800×800
4:5Image Both

Master size Export sizes Max weight3 MBReddit Ads FormatsJPGPNG

Reddit Ads Image Ad / Promoted Post - Portrait (4:5) 1080×1350·Carousel Ad Card 1200×1500·Interactive Ad (Quiz, Poll, Countdown) 816×1024

X (Twitter) Image Ad - Portrait (4:5) 1440×1800
1:1Video Both

Master size Max weight1 GB FormatsMP4MOV

Reddit Ads Video Ad (Promoted Video)

X (Twitter) Promoted Video Ad - Square (1:1)·Amplify Pre-roll Video Ad
16:9Image Both

Master size Export sizes Max weight3 MBReddit Ads FormatsJPGPNGGIF

Reddit Ads Image Ad / Promoted Post - Landscape (16:9) 1920×1080

X (Twitter) Spotlight Takeover (formerly Trend Takeover+) 1280×720
1.91:1Image

Master size Export sizes Max weight5 MB FormatsJPGPNG

X (Twitter) Image Ad - Landscape (1.91:1) 1200×628·Website Card (Image with Website Button) 800×418·App Card (Image with App Button) 800×418·Poll Ad (Image/Video with Poll) 800×418
4:3Image

Master size Export sizes Max weight3 MB FormatsJPGPNGGIF

Reddit Ads Image Ad / Promoted Post - Landscape (4:3) 1440×1080·Image/Video Ad Thumbnail (classic-mode) 400×300
3:4Image

Master size Max weight3 MB FormatsJPGPNGGIF

Reddit Ads Image Ad / Promoted Post - Portrait (3:4)
3:1Image

Master size Max weight2 MB FormatsJPGPNGGIF

X (Twitter) Profile Header / Banner
2:3Image

Master size Max weight5 MB FormatsJPGPNGGIF

X (Twitter) Image Ad - Portrait (2:3)
16:9Video

Master size Max weight1 GB FormatsMP4MOV

X (Twitter) Promoted Video Ad - Landscape (16:9)
9:16Video

Master size Max weight1 GB FormatsMP4MOV

X (Twitter) Vertical Video Ad (9:16, full-screen)

Text limits

Every value each platform uses for the field, characters unless noted

Field	Reddit Ads	X (Twitter)
Headline	300	20 · 50 · 70
Body	40000	257 · 280
Caption	50	90
Title	—	70 · 200
Link/URL	—	23
Message	—	25
Description	—	30

Video side by side

Reddit Ads

Video Ad (Promoted Video) 1200×1200 · 1:1 (also 4:5, 4:3, 16:9 supported) · Max duration: Up to 15 minutes (5-30 seconds recommended; minimum 2 seconds) · 1 GB

X (Twitter)

Promoted Video Ad - Landscape (16:9) 1920×1080 · 16:9 · Max duration: 2 min 20 sec (0:15 or less recommended) · 1 GB
Promoted Video Ad - Square (1:1) 1200×1200 · 1:1 · Max duration: 2 min 20 sec (0:15 or less recommended) · 1 GB
Vertical Video Ad (9:16, full-screen) 1080×1920 · 9:16 · Max duration: 2 min 20 sec (0:15 or less recommended) · 1 GB
Amplify Pre-roll Video Ad 1200×1200 · 1:1 · Max duration: 2 min 20 sec (0:15 or less recommended) · 1 GB