What is Image Generation? Types, Tools, Examples
Image generation is the process of creating visuals programmatically (using templates, code, or AI models) instead of designing each one by hand. If you've ever needed 500 product cards, 100 social media graphics, or dynamic OG images for every blog post, you've needed image generation.
The concept covers a wide range of approaches, from dragging layers around in Photoshop to calling an API that spits back a finished PNG in under a second. If you're new to the technical side, our guide on what an image API is covers the foundations.
Three types of image generationThree Types of Image Generation
Not all image generation works the same way. Here's how the three main approaches compare:
| Approach | How it works | Best for | Control level |
|---|---|---|---|
| Manual design | Software like Photoshop or Canva | One-off creative work | Full |
| Template-based | Fill predefined layouts with dynamic data via API | Production at scale | High |
| AI generation | ML models create new visuals from prompts | Creative exploration | Low |
Manual designManual design
The traditional approach. You open Photoshop, Figma, or Canva, and you build the image yourself. Designers create visual elements, add text, apply effects, and tweak until it looks right.
It works great for one-off projects. But it doesn't scale. If you need 50 versions of the same layout with different data, manual design becomes a bottleneck fast.
Template based generationTemplate-based generation
This is where automation kicks in. You design a template once, with editable fields for text, images, and colors, and then generate variations by feeding different data through an API.
Same input format, predictable output. Every time. It's how e-commerce stores produce thousands of product cards and how SaaS tools generate personalized certificates. The output is brand-consistent and auditable.
Ai generation ml basedAI generation (ML-based)
AI image generation uses deep learning models like diffusion models, GANs, and VAEs to create entirely new visuals from text prompts or training data. Tools like DALL-E, Midjourney, and Stable Diffusion fall into this category.
The output is creative and unique, but unpredictable. You can't guarantee exact text placement, specific hex colors, or pixel-perfect layouts. For a deeper comparison, see AI Image Generation vs. Template APIs.
Who uses image generation and for whatWho Uses Image Generation (and for What)
E commerceE-commerce
Online stores use image generation to add price tags, sale badges, and promo banners to product photos automatically. A store with 2,000 SKUs doesn't edit each image by hand. They automate the entire catalog.
Marketing and advertisingMarketing and advertising
Marketers generate social media graphics, ad creatives, and email visuals at scale. Personalized images, showing a recipient's name or location, drive higher engagement than generic alternatives. Learn how to automate social media images with an API.
Art and creative workArt and creative work
Artists and designers use AI generation to explore visual ideas quickly. Generate 20 variations of a concept in minutes. Pick the best one. Refine it. It's the fastest way to brainstorm without a blank canvas.
Saas and developer toolsSaaS and developer tools
Developers integrate image APIs to auto-generate OG images, user certificates, reports, and dashboard snapshots. No design team needed for every new feature.
Why it matters the benefitsWhy It Matters: The Benefits
- Speed: Automated generation produces hundreds of images in minutes. Manual design can't keep up. See 10 ways businesses use image APIs for real-world examples.
- Consistency: Templates enforce brand guidelines (exact colors, fonts, and logo placement) across every image.
- Personalization: Swap in user-specific data (names, locations, purchase history) to create visuals that feel custom-made.
- Cost: You don't need a designer for every variation. One template, thousands of outputs.
Get startedGet Started
If you're ready to try image generation, Imejis.io gives you 100 free renders a month, no card. Follow our beginner guide to generating images with an API to go from zero to your first generated image in under 30 minutes.