Introduction

Facebook Reels ad specifications define file, format, and creative requirements for Image, Video, and Carousel placements. Creatives must meet ratio, resolution, and file size requirements to ensure proper delivery. Safe zone guidance should be followed to avoid covering key creative elements with the call-to-action.

Publisher

Meta – Facebook

Quick check

• Placement: Facebook Reels
• Creative types: Image, Video, Carousel
• Max file size: Image 30MB, Video 4GB (max duration 2 min), Carousel 30MB
• Aspect ratio: 9:16 for Image and Video, 1:1 for Carousel

Creative specifications

Spec	Image	Video	Carousel
File Type	JPG or PNG	MP4, MOV or GIF	JPG or PNG
Max File Size	30MB	4GB (Max Duration: 2 min)	30MB
Ratio	9:16	9:16	1:1
Resolution	At least 1080x1080	At least 1080x1080	At least 1080x1920
Text Recommendations	Primary Text: 40 characters / Headline: 55 characters	Primary Text: 50–150 characters / Headline: 27 characters	Primary Text: 125 characters / Headline: 40 characters
Min Width	600px	500px	500px
Min Height	600px	NA	NA
Aspect Ratio Tolerance	3%	1%	1%
No of Cards	NA	NA	3 to 10
Landing Page URL	NA	NA	Required
Video Duration	NA	1s – 60 min	1–15s
Settings	NA	H.264 compression, square pixels, fixed frame rate, progressive scan and stereo AAC audio compression at 128 Kbps+	Consider leaving roughly 14% (250px) of the top and 20% (340px) of the bottom of the image free from text and logos to avoid covering these key elements with the call-to-action.

Notes

• Video max file size is 4GB with a maximum duration of 2 minutes.
• Carousel supports between 3 and 10 cards. A landing page URL is required.
• Video duration range is 1s to 60 minutes. Carousel video duration is limited to 1–15s.
• Image aspect ratio tolerance is 3%. Video and Carousel tolerance is 1%.
• Video requires H.264 compression, square pixels, fixed frame rate, progressive scan, and stereo AAC audio compression at 128 Kbps or higher.
• For Carousel, leave roughly 14% (250px) of the top and 20% (340px) of the bottom free from text and logos to avoid covering key elements with the call-to-action.

Spec guide

Source: Meta Ads Guide

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FAQs

Why does a Facebook Reels video meet duration rules but still fail delivery?

A Facebook Reels video can meet the 1 second to 60 minute duration range but still fail if it exceeds the 2 minute maximum file constraint. Delivery systems enforce both limits, so marketers must validate duration and file size together before upload.

What happens if a carousel ad does not include a landing page URL?

A Facebook Reels carousel ad requires a landing page URL for all cards. The system rejects creatives that do not include a valid URL, which blocks campaign activation and delivery.

Can aspect ratio tolerance cause ad rejection in Facebook Reels?

Aspect ratio tolerance can cause rejection if the creative exceeds 3 percent for images or 1 percent for video and carousel. Even small deviations can trigger formatting issues that affect rendering and delivery consistency.

How does safe zone guidance impact text placement in carousel creatives?

Safe zone guidance reserves 14 percent of the top and 20 percent of the bottom of the image. Text or logos placed in these areas risk being hidden by the call-to-action overlay, which reduces visibility and engagement.