AI Blog Image Generator for Medium, Substack, and WordPress
Bloggers and writers use our free AI image generator to create blog header images, in-article illustrations, and social share cards in seconds. Publish polished visuals on Medium, Substack, WordPress, Ghost, and Hashnode.
- Blog-ready visuals in seconds
- Commercial use included
- Free to try: no credit card required
AI Image Tools Built for Blogging
Turn every draft into a visual story. Our AI blog image generator gives writers editorial-quality images that fit the way modern publishing platforms display them.
Platform-Ready Aspect Ratios
Generate in the aspect ratio that matches Medium, Substack, WordPress, Ghost, and Hashnode, then export to each platform's recommended size so your headers and featured images fill the frame without awkward cropping.
Editorial Illustration Styles
Create clean, on-topic illustrations for explainers, essays, and tutorials. Match your blog's tone with flat vector, painterly, photographic, or minimal line-art looks.
OG and Social Share Cards
Produce 1200x630 share cards so your posts look intentional when readers share them on X, Facebook, and LinkedIn. Strong previews earn more clicks from every feed.
Instant Iteration
Not quite right? Regenerate with a tweaked prompt in seconds. Explore colors, moods, and compositions until the visual matches the story you are telling.
High-Resolution Quality
Generate at up to 4K resolution, so images stay crisp on retina screens, wide article layouts, hero banners, and printed features.
Commercial Usage Rights
Publish generated images on monetized blogs, paid newsletters, and client sites. You keep full commercial rights on everything you create.
Every Image a Blog Post Needs
See how bloggers and content creators use our AI image generator across the whole publishing workflow, from the header down to the share card.
Blog Header and Hero Images
Set the tone from the first scroll with a custom header image. Generate wide, editorial hero art that fits the top of your Medium story, Substack issue, or WordPress feature.
In-Article Illustrations
Break up long reads with illustrations that explain your points. Create diagrams, metaphor art, and section visuals sized to sit cleanly inside the body of your post.
OG and Social Share Cards
Make your links irresistible. Generate 1200x630 Open Graph and Twitter cards so your article previews stand out when readers share them across social feeds.
Listicle and Roundup Thumbnails
Give every entry in your listicle or roundup a matching visual. Create consistent thumbnails that keep your best-of posts and comparison guides looking cohesive.
Recommended Blog Image Dimensions by Platform
Match the right size the first time. Generate in the closest aspect ratio, then export to these recommended dimensions to keep your visuals crisp on Medium, Substack, WordPress, Ghost, and Hashnode.
Medium
Recommended article image
1400 x 1050
Substack
Header image
1456 x 816
WordPress
Featured image
1200 x 675
Ghost
Feature image
1200 x 800
OG and Twitter
Social share card
1200 x 630
In-Article
Inline illustration
800 x 450
Publishing on Hashnode too? Its cover images display beautifully at the 1200 x 630 share-card size, so one export can cover both your social preview and your Hashnode cover.
Create Blog Images in Three Steps
No design experience needed. Describe your article, pick a size, and publish. Our AI image generator handles the rest.
Describe Your Article
Enter a prompt like "minimal header illustration for a productivity essay" or "flat-style diagram explaining compound interest."
Pick Your Platform Size
Choose the dimension that matches your platform, from a Substack header to a 1200x630 share card, then generate blog-ready images in seconds.
Download and Publish
Get your high-resolution image and drop it straight into Medium, Substack, WordPress, Ghost, or Hashnode. Iterate anytime with a new prompt.
Loved by Bloggers and Writers
See how creators use our AI image generator to give every post a visual identity.
“I used to spend an hour hunting for stock photos for every Substack issue. Now I generate a custom header that actually fits my story in under a minute.”
Priya N.
Substack Writer
“My Medium reads went up once every article had a distinctive header and share card. Readers tell me my posts look like a real publication now.”
Daniel F.
Medium Blogger
“The in-article illustrations make my long WordPress tutorials so much easier to follow. Consistent visuals, zero design software, all on brand.”
Amara O.
Content Creator
AI Blog Image Generator FAQs
Everything bloggers and writers ask about creating blog visuals.
It is a free tool that turns a short text description into editorial blog visuals. Bloggers and writers use it for header and hero images, in-article illustrations, and OG and social share cards, then publish them on Medium, Substack, WordPress, Ghost, and Hashnode.
Medium recommended 1400x1050, Substack header 1456x816, WordPress featured 1200x675, Ghost feature 1200x800, OG and Twitter share cards 1200x630, and in-article images 800x450. Generate in the matching aspect ratio and export to these sizes so your images look sharp on Medium, Substack, WordPress, Ghost, and Hashnode.
Yes. You receive full commercial usage rights for every image you generate, so you can publish them on monetized blogs, newsletters, and client sites without licensing restrictions.
Not at all. Describe your article topic in plain language and the AI handles composition, color, and style. Writers and content creators get polished visuals without opening a design app.
This page focuses on blogging jobs and platform sizes. For open-ended prompts and every style, use our AI image generator. For click-focused header art, our AI thumbnail generator is a great companion.