Use Cases

Creating Blog Images with AI

Article headers and in-content visuals — without falling into stock-photo cliché.

Short answer

For blog images, Bing Image Creator or Google Gemini are enough and free. Generate the header at 16:9 or 1200×630 pixels (the same size social platforms use). Compress the image and convert it to WebP; large files slow the page down and that directly affects search rankings.

Blog images are the need most comfortably met by free AI tools. The quality bar is low, the sizing is standard and commercial risk is close to nil.

So the real question here is not "which tool" but "how do I avoid cliché". Images that look like stock photography do not hold a reader's attention — and AI's default output sits very close to that aesthetic.

The second issue is technical: file size. Page speed affects search rankings, and AI-generated files pushed live without optimisation move that effect the wrong way.

How to do it

  1. Visualise the concept, not the topic

    For an article on remote work, a desk with a laptop is a cliché. Visualise the piece's actual idea — distance, freedom or isolation — and the reader feels the difference.

  2. Pick the size for sharing

    1200×630 pixels is the right size for both a blog header and a social preview. One image covers both needs.

  3. Compress and convert to WebP

    The PNG files AI produces are large. Converting to WebP typically cuts file size to a third with no visible difference. Page speed is a ranking factor.

Escaping the stock-photo cliché

AI tools gravitate towards the visual language they saw most in training, and that language comes largely from stock photo archives. So when you write "business meeting" you get that image of smiling people shaking hands around a table that nobody believes.

The most effective way to avoid this is describing the concept rather than the topic. Instead of "remote work", write "a single desk above the clouds seen through the window of a mountain cabin". Let the image carry the article's idea, not its subject.

The second method is constraining the visual language. Describing a specific aesthetic — "editorial illustration", "isometric diagram", "risograph print", "technical blueprint" — pulls the model out of its default stock look.

The third is consistency: use the same aesthetic across every image on your blog. That builds a publication identity and tells the reader visually that the articles belong together.

File size and page speed

The files AI tools hand you are usually PNGs over a megabyte. With three images in an article, the page reaches three megabytes on imagery alone; on a mobile connection that is a measurable slowdown.

Page speed is a ranking factor Google states explicitly, and on most blog pages the Largest Contentful Paint metric is bound to the header image. An unoptimised header directly lowers the article's ranking.

The fix is simple: convert to WebP or AVIF and resize to what you actually need. 1200 pixels wide is more than enough for a blog; uploading a 2048-pixel image untouched is pure weight.

Most modern site frameworks do this conversion automatically. If yours does not, running images through a compressor before upload takes minutes and pays off permanently.

Frequently asked questions

Are free tools enough for blog images?

More than enough. Bing Image Creator is completely free and comfortably clears the quality bar for a blog header. Google Gemini is also free and understands Turkish prompts better. The only reason to move to a paid tool is wanting one consistent visual style across the whole blog.

What size should a blog header image be?

1200×630 pixels is right for both a blog header and a social sharing preview; one image covers both. Convert the file to WebP and compress it — page speed is a ranking factor and the header is the heaviest element on most blog pages.

Should I disclose that I used AI images?

In most cases there is no legal requirement, but transparency builds reader trust and some platforms (social networks, news aggregators) expect AI content to be labelled. For news and anything making a factual claim, disclosure is ethically necessary; for decorative blog imagery it is optional.

Sample prompts

Prompts are written in English because most tools give markedly better results with English prompts.

Conceptual header image

conceptual editorial illustration, a single paper boat crossing a vast calm sea of pale blue paper, minimal composition, soft studio light, muted palette, generous negative space, 16:9 ratio

Works well in these tools: bing-image-creator, google-gemini, dall-e-3

Note: Conceptual illustration draws attention without stock-photo cliché and visualises the article's idea.

In-content explanatory visual

clean isometric illustration of three connected stages, flat colours in blue and warm grey, thin outlines, no text, white background, technical diagram aesthetic, evenly spaced composition

Works well in these tools: bing-image-creator, google-gemini, dall-e-3

Note: Adding "no text" is critical: AI writes meaningless letters onto diagrams; add the labels yourself afterwards.

Recommended tools

Completely free with a Microsoft account; the way to use the DALL·E family at no cost.

Free tier:
Yes
Text inside images:
Yes

Free with a Google account; generate and edit images by talking inside a chat.

Free tier:
Yes
Text inside images:
Yes

The most prompt-faithful generator, steerable through a conversation in ChatGPT.

Free tier:
Yes
Text inside images:
Yes

Free credits that renew daily, a large model library and dedicated tooling for game assets.

Free tier:
Yes
Text inside images:
No