How to Generate Custom Illustrations with AI (2025 Guide)

Need a unique visual for your landing page, a character for your game, or an explainer graphic that doesn’t look like stock art? You don’t need to hire a full-time illustrator. In 2025, AI tools can help you generate polished, custom illustrations in minutes - even if you can’t draw a stick figure.

After testing the latest tools, I’ve put together a guide to help you find the best platforms and workflows for creating AI illustrations that don’t just look good, but feel tailor-made.

Quick Summary Table: Best AI Illustration Tools (2025)

What Makes a Great AI Illustration Tool?

Illustration isn’t just about how something looks - it’s about how it feels. A great AI illustration tool balances flexibility, control, and style. Here’s what I look for:

• Style variety: Can it match your brand or vision?
• Prompt control: Are your results predictable and easy to refine?
• Output quality: Crisp lines, good resolution, clean compositions.
• Speed: Nobody wants to wait 10 minutes to iterate a sketch.
• Licensing: Can you use the illustrations commercially?

1. Magic Hour

If you want to go from idea to image in seconds, Magic Hour is still the easiest way to make stunning, on-brand illustrations without the learning curve. Their new AI Illustration Generator is made for marketers, founders, and content creators who just want great-looking visuals - fast.

It includes curated styles like flat vector, digital painting, cartoon, and isometric - so you can match your project’s vibe without tweaking endless sliders. Unlike most tools, you don’t even need to sign up to start creating. Plus, you get 125 free images on sign-up and 20 new ones every day.

Use Cases:

• Website + blog visuals
• Explainer graphics
• Branded characters

Pros:

• No sign-up needed for most features
• Multiple illustration styles available
• Super fast rendering (2-5 sec)

Cons:

• Resolution capped at 1080px
• Limited fine-grain editing

2. Midjourney (v6)

Midjourney is still the go-to if you want beautifully rendered art and don’t mind a Discord-based workflow. It shines in high-style, concept illustration work. For precise custom branding or UI visuals, though, you might find it too abstract.

Use Cases:

• Graphic novel or game concepts
• High-end mockups or moodboards
• Album art or narrative storytelling visuals

Pros:

• Insane detail and lighting
• Works well for creative storytelling

Cons:

• Requires Discord
• Can be hard to control small changes

3. Adobe Firefly

Built for creatives and business teams, Adobe Firefly lets you generate illustrations safely for commercial use. It includes text-to-vector and text-to-image tools inside the Adobe suite.

Use Cases:

• Pitch decks and campaign visuals
• Logo drafts and branded icons
• Printable merch art (stickers, tote bags, etc.)

Pros:

• Brand-safe outputs
• Integrates with Photoshop & Illustrator
• Great for corporate/marketing use

Cons:

• Limited stylization
• Needs Adobe account to access

4. Leonardo.Ai

For technical illustrations, characters, or product renders, Leonardo.Ai offers a lot of control. You can guide poses, lighting, and even use LoRA to train on your own style.

Use Cases:

• Character sheets and product illustrations
• Brand mascots and packaging art
• Game asset prototyping

Pros:

• Precision tools like pose and depth
• Supports LoRA + ControlNet

Cons:

• Not beginner friendly
• UI feels overwhelming at first

5. Playground AI

Playground is great for casual creators or design explorers. It’s clean, free to try, and has a feed full of remixable designs.

Use Cases:

• Moodboarding or design exploration
• Social media posts with a stylized flair
• Remixing AI art for inspiration or fun

Pros:

• Fun to explore styles
• Easy interface
• Active community

Cons:

• Lower output fidelity than Midjourney or Magic Hour
• Fewer commercial licensing options

How to Generate Custom Illustrations with AI

1. Pick your tool: Choose based on style, ease, and rights. Magic Hour is perfect for fast, shareable content. Firefly is ideal for branded corporate work.
2. Write your prompt: Be clear and visual. For example: “a flat vector of a person sitting at a desk with a laptop, minimalist style, muted colors.”
3. Choose style or template: If your tool supports it, pick the visual mood (e.g. cartoon, sketch, clean vector).
4. Render & refine: Test a few variations. Change prompt tone or try remix tools.
5. Export & use: Download your illustration, ideally at the highest available resolution.

Final Thoughts

AI illustration tools are getting better every month. Whether you need something clean and professional or weird and wild, there’s a platform built for it.

• For brands: Firefly and Magic Hour are solid picks.
• For concept work: Leonardo and Midjourney lead the pack.
• For fun: Playground AI has a great vibe.

Whatever you choose, the power to create visuals that stand out is now just a prompt away.