Blog Article Cover Image Generator
Paste your article title and a short summary, pick your niche, and get a free AI-generated featured image built to editorial conventions - widescreen 16:9 for your blog header, or an exact 1200×630 PNG ready to drop in as your Open Graph share image. The crafted prompt comes with it.
Niche
Let the article's own subject set the visual direction.
Size
Add your title above and you'll get back a crafted image prompt, a finished featured image at blog or Open Graph size, and a short note on why that composition suits your topic.
What makes a featured image work, and why niche matters
A blog header does a job before anyone reads a word: it sets the register of the piece. The same headline wants a very different picture depending on whether it's a finance explainer or a food post, so the niche you pick genuinely changes the art direction - palette, lighting, materials and composition all shift. Each niche also carries an explicit list of clichés to avoid, because the fastest way to look like every other blog is to reach for a glowing blue circuit board, a stack of coins, or a posed handshake.
Composition is treated as a real constraint too, not an afterthought: the prompt asks for the subject to be placed so that a defined region of the frame stays visually quiet, which is what lets your theme's headline overlay sit on top of the image and still be readable. The prompt itself follows the same Flux prompt-engineering rules as this site's AI Prompt Generator, and rendering runs through the same free pipeline as the AI Image Generator.
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How does this blog cover image generator use my article?
It reads your title and summary the way an editor would brief a designer: what is this piece about, how serious is it, and what single image sets that expectation. From that it writes a detailed image-generation prompt and renders it. Giving a summary or intro paragraph as well as the title makes a noticeable difference - the title alone often supports several very different readings, and the summary is what tells the tool which one you meant.
Can I use the 1200x630 output directly as my Open Graph / social share image?
Yes - that's exactly what it's for. Pick the 1200x630 OG size and the download is re-rendered through a canvas to that exact pixel size, which is what Facebook, LinkedIn, X, Slack and Discord expect for an og:image. Just upload the PNG and point your og:image and twitter:image meta tags at it. It's the same file that works as a WordPress featured image or a link preview card.
Which sizes should I use for a blog featured image?
16:9 widescreen (1280x720) is the safe default for a post header and works with essentially every WordPress, Ghost and Webflow theme. The 1200x630 option is the standard social-share ratio and is the one to use when the image is going to be seen mostly as a link preview. If you need both, generate one, then switch size - the same art direction is re-rendered at the new frame.
Is this AI featured image generator really free?
Yes - free, no sign-up, no credit card, no watermark on the download and no cap from this site. Images are generated through Pollinations.ai, a free open-source platform, so quality and speed vary with load in a way a paid service wouldn't. At busy times a render can take longer than the usual 10-30 seconds or occasionally fail; if it does, the prompt stays on screen and you can just regenerate.
Why is there no text or title baked into the generated image?
Deliberately. Diffusion models still render lettering unreliably - words come out misspelled or subtly warped, which looks worse than no text at all. Almost every blog platform and social card already draws your headline over the featured image itself, so the image is composed to leave room for that instead. Tick "Preview headline overlay" to see how your actual title sits on the composition; that preview isn't part of the downloaded file.
Can I use these images commercially on a monetised blog?
Pollinations.ai is open-source and free to use but doesn't publish detailed ownership or commercial-licensing terms the way paid generators do. Many people use it for blog headers without issue, but if your site is a commercial publication or the image is going into paid promotion, review Pollinations' current terms yourself and consider a paid service with an explicit licence. Also give any image a quick check before publishing - AI models still get hands, faces and small details wrong.