> Quick answer: Use 1080x1080px images, a minimum of two carousel cards, headlines under 25 characters, and let the "after" card land the result. Coinis's Before & After workflow generates the transformation pair for you and keeps both cards visually consistent.
What Is a Before-After Carousel Ad on Facebook?
Carousel ads show multiple images or videos in a single ad unit. Viewers swipe through cards on mobile or click arrows on desktop. Each card has its own image, headline, description, and CTA button.
How carousel ads work
Every card runs independently. You can use two cards or up to ten. Meta delivers them in sequence by default, but you can let the algorithm auto-optimize card order for performance.
Why before-after is effective for transformations
The swipe motion mirrors a reveal. Users see a problem on card one. They swipe to see the result. That built-in tension drives engagement and click-throughs better than a single static image.
Common use cases
Beauty and skincare. Fitness and weight loss. Home renovation. Ecommerce products with visible results. Any business that can show a clear visible change benefits from this format.
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Technical Specifications for Before-After Carousel Ads
Per Meta's Business Help Center, these are the specs you need before you build your ad.
Image dimensions and aspect ratios
Use 1080x1080 pixels. That is the recommended square format for feed placements. Non-square ratios from 9:16 to 16:9 are technically supported, but feed crops them to 1:1. Preview across placements before you publish. The minimum image size for Instagram is 600x600 pixels. Meta allows a 3% aspect ratio tolerance.
Minimum and maximum number of cards
You need at least two cards. App install campaigns require three. Instagram Stories carousels support up to ten cards using a 9:16 aspect ratio.
File size and format requirements
Each image must stay under 30 MB per file. Videos can run up to 4 GB. You can mix images and videos within the same carousel.
Text character limits
Keep card headlines under 25 characters. That is the mobile sweet spot. Description text has a practical limit of around 125 characters before it truncates on screen.
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Best Practices for Before-After Carousel Design
Good specs are table stakes. Strong design wins the click.
Structuring the transformation sequence
Card one shows the "before." Card two delivers the "after." Add a third card with a direct CTA if you want to push deeper into the funnel. Keep it tight and linear.
Making the first card (before) compelling
The before card must show a real, relatable problem. Bland before shots get skipped. Show the mess, the flaw, or the pain point clearly. That tension earns the swipe.
Writing clear, concise copy for each card
One idea per card. One punchy headline. Keep descriptions tight. Do not try to tell the full story in the text. The image carries the message.
Mobile optimization
Most users see your carousel on a phone. Square images fill the frame better. Small text becomes unreadable at mobile scale. Test your creative on a small screen before you launch.
Consistency and visual flow between images
Match the lighting, framing, and color palette across cards. Mismatched images feel like two different ads stitched together. Consistent visual style builds credibility.
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How to Create a Before-After Carousel Ad Using Coinis
Coinis's Before & After workflow handles the creative build automatically.
Step 1: Upload your before and after images
Open the Before & After workflow. Upload your source images. Coinis runs them through premium AI models to enhance quality and match visual consistency between cards.
Step 2: Set up the carousel in Coinis's Before & After workflow
The workflow generates your transformation pair as matched carousel cards. Brand colors, fonts, and style pull automatically from your Brand Profile. No manual formatting required.
Step 3: Add copy and CTAs to each card
AI Copywriting suggests headlines and descriptions for each card based on your brand context. Edit inline. Keep headlines under 25 characters for mobile.
Step 4: Save to Creative Library and launch
Save the finished carousel to your Creative Library. Organize into folders for future campaigns. Launch directly to Facebook and Instagram through Campaign Launcher.
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Common Mistakes to Avoid
These errors kill otherwise strong before-after ads.
Poor image quality or mismatched dimensions
Blurry or pixelated images get rejected or ignored. Use 1080x1080px. If your source files are low-resolution, AI Upscale in Coinis Revise can sharpen them before you build the carousel.
Overcrowded text or unreadable fonts
Two lines of copy per card is the ceiling. More than that and mobile users scroll past it. White space is part of the design.
Weak opening card
A generic before image loses the swipe. Show a specific, recognizable problem. The more relatable the setup, the better the engagement.
Inconsistent branding or styling
Different fonts, colors, or photo styles across cards break visual trust. Brand Profile in Coinis locks your style settings across every card automatically.
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Frequently Asked Questions
What image size should I use for a before-after Facebook carousel ad?
Use 1080x1080 pixels (1:1 square). It is the recommended size for feed placements on Facebook and Instagram. The minimum is 600x600 pixels for Instagram. Non-square images get cropped to 1:1 in most feed placements, so square is the safest choice.
How many cards does a Facebook carousel ad require?
You need a minimum of two cards for most objectives. App install campaigns require at least three. Instagram Stories carousels support up to ten cards.
Can I mix images and videos in a before-after carousel ad?
Yes. Meta supports mixed-content carousels, so you can include both image and video cards in the same ad unit.
What text length works best on each carousel card?
Keep headlines under 25 characters for mobile readability. Description text should stay around 125 characters or fewer to avoid truncation.