What sizes should Facebook ads be?

Use 4:5 (1080×1350) or 1:1 (1080×1080) for feed placements and 9:16 (1080×1920) for Stories and Reels. The composer lets you pick the ratio before generating, so the creative is composed for the placement rather than cropped afterwards.

Does it write the ad copy too?

Yes. The AI Agent writes primary text, headlines, and descriptions in your tone, and the AI Campaign Builder pairs them with creatives and audiences. You can also use the ad copy generator on its own.

Can it launch the ad to my Facebook ad account?

Yes. AdStellar connects to Meta through the official API. Creatives, copy, audiences, and budgets launch as complete campaigns into your own ad account, in draft or live, with every decision explained.

Will the ads look like real creator content?

Image models like GPT Image 2.5 Flare are tuned for phone-camera realism, and Talking Actors renders photoreal creator-style videos with AI actors. Both are designed to blend into the feed rather than read as stock imagery.

Is the Facebook ad generator free?

Yes. Set up your Facebook ad generator here, then create a free AdStellar account to render it. Every account starts with a 7-day free trial and $100 in free credits, which covers hundreds of image generations or dozens of video renders, and you can download everything you make.

How do I keep generations on brand?

Attach a product (name, URL, images, and selling points) or a reference image so the models work from your real product instead of an invented one. Product context carries into prompts automatically, and reference images steer composition, colors, and subjects.

Can I use the generated creatives in paid campaigns?

Yes. Creatives you generate in AdStellar are yours to use in your ads, on your site, and across your channels. Because they launch straight into your own Meta ad account, there is no export, re-upload, or license step in between.

Free AI tool

Facebook Ad Generator

Describe your offer, pick a format and aspect ratio, and generate image or video creatives sized for Facebook feed, Stories, and Reels. Launch the winners to Meta in one click.

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Need ideas? Try an example:

Image and video creatives sized for Facebook and Instagram feed, Stories, and Reels. Launches straight into your Meta ad account.

What you can make

Feed image ads

4:5 and 1:1 creatives for the Facebook and Instagram feed, with room left for your headline.

Reels and Stories

9:16 vertical video ads, 5 to 15 seconds, composed for full-screen placements.

UGC-style videos

Creator-style talking videos with AI actors, the format that keeps winning in Meta auctions.

Variations for testing

Render several variations, then let Bulk Ad Launch turn them into hundreds of ad combinations.

How it works

Describe the offer

Say what you are selling, to whom, and the angle. Add a product or reference image to keep it on brand.

Pick the placement format

4:5 or 1:1 for feed, 9:16 for Stories and Reels, image or video, and how many variations to render.

Generate and launch

The AI Agent adds primary text, headlines, and audiences, and launches the campaign to Meta in one click.

Powered by the best AI models

Every model is included on every plan. Route each job to the one that suits it, and switch when a better one ships.

Image models

GPT Image 2.5 Flare

OpenAI

OpenAI's newest image model. Natural lighting, real skin texture and phone-camera realism — the strongest pick for UGC and creator-style ads, plus edits that change only what you ask for.

1:1 · 4:5 · 9:16 · 16:9
Quality: low / medium / high

Nano Banana 2

Google

Google's reliable all-purpose image model. Fast and cheap for product shots, lifestyle scenes, and quick variation batches.

1:1 · 4:5 · 9:16

Nano Banana Pro

Google

Google's flagship image model (Gemini 3 Pro Image). Reasoning-based generation, accurate text rendering, character consistency up to 5 subjects per scene.

1:1 · 4:5 · 9:16 · 16:9
1K · 2K · 4K

GPT Image 2

OpenAI

OpenAI's latest image model. Best-in-class typography and fine detail — ideal for posters, hero copy, and design-heavy ads.

1:1 · 4:5 · 9:16 · 16:9
Quality: low / medium / high

GPT Image 2.5 Sunburst

OpenAI

OpenAI's precision model for premium creative: the tightest control across repeated edits and intricate detail, in exchange for roughly 2x Flare's render time.

1:1 · 4:5 · 9:16 · 16:9
Quality: low / medium / high

Imagen 4

Google

Google's highest-quality image model. Best for photorealism, fine textures, rich lighting — portraits and cinematic product hero shots.

1:1 · 9:16 · 16:9
1K · 2K

HTML

Anthropic

Claude designs the ad as HTML/CSS, rendered to a pixel-perfect PNG. Crisp text and precise layouts — no photorealistic imagery.

1:1 · 4:5 · 9:16

Video models

Kling 3.0 Pro

Kuaishou

Best overall cinematic quality. Multi-shot continuity, native audio, strong character consistency.

9:16 · 16:9 · 1:1
5s · 10s · 15s

MiniMax H3 Max

MiniMax

Reference-to-video: attach up to 9 images, 3 audio clips, and 3 videos and mention them in the prompt with @Image1-style tokens for tight control over subjects and style.

9:16 · 16:9 · 1:1 · 4:3 · 3:4 · 21:9
5s · 10s · 15s
480p · 768p
References

MiniMax H3 Max Turbo

MiniMax

The fast, text-only sibling of H3 Max. Same ratios and lengths, quicker renders for iteration.

9:16 · 16:9 · 1:1 · 4:3 · 3:4 · 21:9
5s · 10s · 15s
480p · 768p

MiniMax H3 (2K)

MiniMax

Sharper renders up to 2K for hero placements, at a higher credit cost per second.

9:16 · 16:9 · 1:1 · 4:3 · 3:4 · 21:9
5s · 10s · 15s
480p · 768p · 2K

Seedance 2.5

ByteDance

Reference-to-video with up to 30-second clips, optional audio, and 1080p output. Attach images, audio, and video references to steer the result.

9:16 · 16:9 · 1:1
5s · 10s · 15s · 30s
480p · 720p · 1080p
References
Audio

What is a Facebook ad generator?

A Facebook ad generator creates the creative and copy for a Facebook or Instagram ad from a short brief. The useful ones know the placements: 4:5 and 1:1 for feed, 9:16 for Stories and Reels, the safe zones where Meta overlays its interface, and the creator-style realism that performs in the auction. Instead of adapting a generic design, you generate the asset for the placement.

AdStellar is built around Meta specifically. The composer above renders image and video creatives with the latest models; the AI Agent writes primary text, headlines, and descriptions; the AI Campaign Builder assembles audiences, budgets, and structure from your own account history; and the whole thing launches to your ad account without leaving the platform.

The payoff is testing velocity. A single brief can become dozens of creatives and hundreds of ad combinations in minutes, and Creative Analytics tells you which hooks, formats, and audiences won so the next round starts from the winners.

Inside AdStellar