Quick answer: Feed AI your brand context first. Then generate to spec. Facebook feed image ads need 1440x1440px or 1440x1800px resolution, JPG/PNG under 30MB, a 27-character headline, and 50-150 characters of primary text. Coinis Image Ads handles all of it from a single product URL.
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What Makes an Effective AI-Generated Facebook Ad
Two things separate a great AI Facebook ad from a wasted budget: correct specs and real brand context. Generic AI output misses both.
Technical specifications that matter
Per Meta's Ads Guide, Facebook feed image ads must meet specific technical thresholds before they go live. Resolution, file type, and aspect ratio all affect delivery and approval. Skipping these checks costs you money before your audience even sees the ad.
Visual quality and brand alignment requirements
High-resolution images build trust at a glance. Blurry or off-brand creatives damage conversions before a user reads your copy. AI generation only helps when the model knows your colors, product visuals, and tone of voice.
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Facebook Feed Image Ad Specifications
Per Meta's Ads Guide, these are the non-negotiable specs for Facebook feed image ads. Get these wrong and your ad won't run.
Recommended dimensions and aspect ratios
Facebook feed image ads support aspect ratios from 1.91:1 to 4:5. The optimal resolutions are 1440x1440px (1:1 square) and 1440x1800px (4:5 portrait). Portrait takes up more screen real estate on mobile. Square works across both Facebook and Instagram placements. Per Meta's Business Help Center guidance on aspect ratios, mobile placements perform best when you use the full vertical space.
File format and size requirements
Use JPG or PNG only. Maximum file size is 30MB. Minimum image width is 600px. Minimum height depends on your chosen ratio: 600px for 1:1 and 750px for 4:5. Going bigger is better. Meta recommends 1080x1080px or larger for best visual quality. Higher resolution protects you against cropping and compression on mobile feeds.
Text guidelines for headlines and primary copy
Keep your headline to around 27 characters. Primary text performs best at 50-150 characters. Per the Meta Business Help Center, there is no hard character limit on text overlays within the image itself. But cleaner images perform better. Keep in-image text minimal and legible.
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The Best Approach: Understand Your Brand First
AI generates better ads when it knows who you are. Skipping brand context is the most common mistake advertisers make.
Why brand context improves AI output
A generic prompt produces a generic ad. Brand context, your tone, colors, product details, and audience, shapes the output toward something that actually fits your business. The difference shows up immediately in the creatives.
Setting up your brand profile for consistency
Coinis Brand Profile analyzes your website and extracts your brand voice, color palette, and key product details. It powers every creative you generate going forward. Set it up once. Every ad stays on-brand without re-briefing the AI each time.
Feeding brand guidelines to AI generation
Once your Brand Profile is active, the Coinis Image Ads workflow pulls your brand context automatically. No copy-pasting briefs into prompts. No losing your brand tone mid-campaign. Every generation starts with the full picture of who you are.
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Generate Your Facebook Ad with AI
Five steps from zero to a spec-ready Facebook ad.
Step 1: Input your product URL or brand context
Open Coinis Image Ads. Paste your product URL. The platform reads your page and extracts the product name, description, and visuals. If you have a Brand Profile set up, it loads automatically and enriches the generation.
Step 2: Choose Facebook feed as your placement
Select Facebook feed as your target placement. The Image Ads workflow applies the correct aspect ratio and resolution automatically. No manual spec lookup. No guessing which dimensions to use.
Step 3: Let AI create variations on-brand
Premium AI models generate multiple creative variations based on your brand context and product details. You get real options to compare. Pick the strongest one or review them all before deciding.
Step 4: Review against Meta specifications
Before you export, confirm resolution, file size, and copy length. Check that your primary text lands in the 50-150 character range. Keep the headline under 27 characters. The platform flags common spec issues before they block your submission.
Step 5: Launch and test
Use Coinis Campaign Launcher to publish directly to Facebook. Set your audience, budget, and go live. Track performance on the Advertise reporting page. When results soften, refresh your creatives and test again.
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Quick Checklist Before Publishing
Run through this before every ad submission.
Image quality and resolution confirmation
- Minimum 1080x1080px recommended (1440x1440px or 1440x1800px for best results)
- JPG or PNG format only
- File size under 30MB
Ad copy meets character limits
- Headline: aim for 27 characters
- Primary text: 50-150 characters for best performance
- In-image text: no hard limit, but keep it clean and readable
Compliance with Meta policies
All ads must comply with Meta Advertising Policies. AI-generated images are not exempt. Review your creative for prohibited content before submitting. Policy issues delay or kill your campaign before it starts.
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Or let Coinis do it.
From a product URL to a live Meta campaign. AI-generated creatives. On-brand copy. Direct publish to Facebook and Instagram. Real performance reporting. All in one platform.
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Frequently Asked Questions
What image size works best for Facebook feed ads?
Use 1440x1440px for square (1:1) or 1440x1800px for portrait (4:5). Per Meta's Ads Guide, these resolutions give you the sharpest output across mobile and desktop placements. Minimum width is 600px, but going smaller risks compression and cropping on mobile feeds.
How long should Facebook ad copy be?
Per Meta's Business Help Center, your primary text performs best at 50-150 characters. Keep your headline to around 27 characters. There is no character limit for text overlays within the image, but cleaner images typically drive better engagement.