Google Ads vs Reddit Ads image sizes 2026

One file works on both for 0 formats, one layout with two exports for 1, and 2 need their own layout. 2 of 17 layouts below serve both platforms.

Google AdsvsReddit Ads

Check one creative against Google Ads and Reddit Ads

Drag & drop your creative or click to choose a file Checked against 27 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	Google Ads	Reddit Ads	For both
Square	Responsive Display — Square Image 1:15 MB JPGPNGGIF	Image Ad / Promoted Post - Square (1:1) 1:13 MB JPGPNGGIF	One layout, two exports
Vertical / Portrait	Demand Gen — Vertical Image (9:16) 9:165 MB JPGPNG	Image Ad / Promoted Post - Portrait (3:4) 3:43 MB JPGPNGGIF	Different layouts
Landscape	Responsive Display — Landscape/Horizontal Image 1.91:15 MB JPGPNGGIF	Image Ad / Promoted Post - Landscape (16:9) 16:93 MB JPGPNGGIF	Different layouts
Carousel	—	Carousel Ad Card 4:5 (also 1:1, 4:3, 16:9; same ratio on all cards recommended)20 MB JPGPNGGIF	Only on Reddit Ads
Profile picture	Responsive Display — Square Logo (1:1) 1:15 MB JPGPNGGIF	—	Only on Google Ads
Display banner	Uploaded Display — Portrait 300x1050 2:7150 KB GIFJPGPNGHTML5	—	Only on Google Ads

One creative set for both

Layouts: 17 · used on both platforms: 2

4:5Image Both

Master size Export sizes Max weight3 MBReddit Ads FormatsJPGPNG

Google Ads Demand Gen — Vertical Image (4:5) 960×1200

Reddit Ads Image Ad / Promoted Post - Portrait (4:5) 1080×1350·Carousel Ad Card 1200×1500·Interactive Ad (Quiz, Poll, Countdown) 816×1024
1:1Image Both

Master size Export sizes Max weight3 MBReddit Ads FormatsJPGPNGGIF

Google Ads Responsive Display — Square Image 1200×1200

Reddit Ads Image Ad / Promoted Post - Square (1:1) 1080×1080·Free-form Ad (Rich Text Post) 1200×1200
6:5Image

Master size Export sizes Max weight150 KB Formats—

Google Ads Uploaded Display — Medium Rectangle 300x250 300×250·Uploaded Display — Large Rectangle 336x280 336×280·AMPHTML Display Ad 300×250
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
1.91:1Image

Master size Max weight5 MB FormatsJPGPNGGIF

Google Ads Responsive Display — Landscape/Horizontal Image
9:16Image

Master size Max weight5 MB FormatsJPGPNG

Google Ads Demand Gen — Vertical Image (9:16)
8.09:1Image

Master size Max weight150 KB FormatsGIFJPGPNGHTML5

Google Ads Uploaded Display — Leaderboard 728x90
4:15Image

Master size Max weight150 KB FormatsGIFJPGPNGHTML5

Google Ads Uploaded Display — Wide Skyscraper 160x600
32:5Image

Master size Max weight150 KB FormatsGIFJPGPNGHTML5

Google Ads Uploaded Display — Mobile Banner 320x50
1:2Image

Master size Max weight150 KB FormatsGIFJPGPNGHTML5

Google Ads Uploaded Display — Half-Page 300x600
3.88:1Image

Master size Max weight150 KB FormatsGIFJPGPNGHTML5

Google Ads Uploaded Display — Billboard 970x250
2:7Image

Master size Max weight150 KB FormatsGIFJPGPNGHTML5

Google Ads Uploaded Display — Portrait 300x1050
16:5Image

Master size Max weight150 KB FormatsGIFJPGPNGHTML5

Google Ads Uploaded Display — Large Mobile Banner 320x100
3:4Image

Master size Max weight3 MB FormatsJPGPNGGIF

Reddit Ads Image Ad / Promoted Post - Portrait (3:4)
16:9Image

Master size Max weight3 MB FormatsJPGPNGGIF

Reddit Ads Image Ad / Promoted Post - Landscape (16:9)
16:9Video

Master size Max weight— Formats—

Google Ads Responsive Display — Video Asset
1:1Video

Master size Max weight1 GB FormatsMP4MOV

Reddit Ads Video Ad (Promoted Video)

Text limits

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

Field	Google Ads	Reddit Ads
Headline	30	300
Short headline	30	—
Long headline	90	—
Description	90	—
Company name	25	—
Caption	—	50
Body	—	40000

Video side by side

Google Ads

Responsive Display — Video Asset 1920×1080 · 16:9 (also 1:1, 2:3 accepted) · Max duration: Any length (30 seconds preferred)

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