How to generate website images with AI (that don't look fake)

01Where AI images fit on a site — and where they don't

AI image generators are genuinely useful, but only in the right slots. The honest rule is simple: use AI where the image is decorative or illustrative, and never where a visitor is being asked to trust that what they're seeing is real.

Get that split right and AI saves you hours of stock-photo hunting. Get it wrong and you quietly burn the trust that makes a site convert in the first place.

Good fits for AI images

• Hero visuals. An abstract or stylized hero that sets a mood is a strong fit — nobody expects it to be a literal photograph of your office.
• Section backgrounds and textures. Gradients, patterns, and atmospheric backdrops are low-risk and easy to generate on-brand.
• Blog featured images. A topical, editorial illustration for an article header is exactly where AI shines and where nobody is misled.
• Spot illustrations and icons. Concept art for a feature, a friendly diagram-style graphic, an empty-state illustration — decorative by nature.

Where AI images are the wrong tool

• Real product photos. If you sell a physical thing, buyers want to see that thing. An AI render of a product you ship is misleading and a return-rate problem.
• Real people and team shots. A generated "founder" or "team" photo reads as fake the moment someone looks closely, and it undermines an About page instead of strengthening it.
• Testimonials and reviews. Never pair a quote with an AI-generated face. A fabricated person attached to a claim crosses from decoration into deception.
• Trust signals. Certifications, real screenshots of your own product, case-study evidence — these have to be real to do their job.

The line that holds up: AI is fine for mood and concept, wrong for evidence. The moment an image is meant to prove something — this is the product, this is a real customer, this is our team — it has to be real or it works against you.

02Choosing a style so it doesn't scream "AI"

Most images that get clocked as AI aren't bad — they're generic. They share a recognizable default look: glossy, over-rendered, vaguely corporate, with that uncanny smoothness. Avoiding the tell is mostly about art direction, not luck.

Avoid the generic default

Generators converge on a house style when you give them a vague prompt. Push them off it. Specify a medium and mood — flat editorial illustration, grainy film photo, paper-cut collage, isometric line art — instead of accepting the default photoreal gloss.

• Name a concrete medium and palette, not just a subject. "Muted two-color risograph print" beats "a picture of teamwork."
• Give a real composition: camera angle, focal subject, lighting direction. Vagueness is what produces the average-of-everything look.
• Vary style across a page. Three images in the same glossy template read as a batch; mixing an illustration, a texture, and a photo-style shot reads as design.

Keep text out of the image

This is the single biggest giveaway. Image models garble letters into half-formed gibberish, and that mangled text is exactly the artifact people now recognize as "AI." Our own rule is hard: no legible text inside a generated image, ever.

Instead, leave label areas blank or color-coded in the generation, then add any real words as HTML text, a caption, or an SVG overlay on top. Real type stays crisp, stays editable, and stays readable to screen readers and search engines — none of which a baked-in pixel label can offer.

Art-direction tips that help

• Generate four candidates per concept and pick, rather than shipping the first result.
• Match the image's color story to your actual brand palette instead of the generator's default neon-and-gradient reflex.
• Avoid AI-rendered "real" humans, especially close-up faces — they're where the uncanny tells cluster hardest.
• Edit after generating. A quick crop, recolor, or grain pass in any editor pulls an image further from the template look.

03A practical generate-edit-optimize workflow

A repeatable loop beats prompt-roulette. The version that works treats generation as a draft stage and always ends with editing and optimization before anything touches the page.

• 1. Write a specific prompt. Subject, medium, palette, composition, mood. Add a negative instruction to exclude legible text and any real recognizable faces.
• 2. Generate a batch and iterate. Produce several candidates, then refine the prompt based on what the model got wrong rather than regenerating blindly.
• 3. Edit the winner. Crop to the slot's aspect ratio, fix the color to your palette, remove any stray artifact or accidental text fragment, add grain or texture if it helps it look intentional.
• 4. Export for the web. Save in a modern format at the exact dimensions the slot needs — not a 4000px file dropped into a 600px box.
• 5. Place with real alt text and a caption. Write alt text that describes the image, and put any words you wanted "in" the image into a real caption instead.

The discipline is that generation is step two of five, not the whole job. The editing and optimization steps are what separate an image that helps the page from one that drags it down.

04Optimize images for speed and Core Web Vitals

A gorgeous AI hero that ships as a 3 MB PNG is a performance liability. Images are the heaviest thing on most pages, and the hero is usually the Largest Contentful Paint element — the exact metric Core Web Vitals grades. Optimization isn't optional.

• Use modern formats. Export WebP or AVIF instead of PNG or JPEG where you can — same visual quality at a fraction of the bytes.
• Size to the slot. Resize the file to the dimensions it actually renders at (with a sensible cap for retina), and serve responsive sizes so phones don't download a desktop-width image.
• Compress. Run every export through compression. For decorative AI art you can push compression harder than you'd dare with a real photo.
• Lazy-load below the fold. Let the hero load eagerly, but lazy-load everything further down so it isn't fetched until a visitor scrolls toward it.

Then test on a real phone on a real connection, not just a fast desktop. The image being pretty doesn't matter if it pushes your LCP past two and a half seconds — slow loses visitors before they ever see the design.

05Licensing and rights basics

Generating an image doesn't automatically mean you can use it commercially. Terms differ by tool and by plan, so check before you put anything on a page that makes money.

• Confirm commercial use is granted. Some generators allow it on paid plans only, some restrict it on free tiers. Read the terms for the plan you're actually on.
• Watch ownership vs. license. Several tools grant you a broad usage license rather than full copyright ownership, which is usually fine for a website but worth knowing.
• Don't generate trademarked or recognizable likenesses. Brand logos, characters, and identifiable real people open legal exposure no generator's terms cover.
• Keep a record. Note which tool and plan produced each image, in case you ever need to show provenance.

None of this is legal advice — it's operating guidance. When the stakes are high or the terms are ambiguous, confirm with the tool's current license or a professional rather than assuming.

06Accessibility: alt text done right

An image without alt text is invisible to screen readers and weaker for search engines. AI images need the same care here as any other — generating the picture doesn't generate its description.

• Describe the meaningful ones. Write what the image shows and why it's there, in a short, plain sentence — not a keyword dump.
• Mark purely decorative images empty. A background texture or divider that carries no information gets an empty alt attribute so screen readers skip it.
• Never rely on baked-in text. Since legible text shouldn't live inside the image anyway, any words a visitor needs belong in real HTML where assistive tech can read them.
• Caption when it adds context. A visible caption helps every reader and is a natural home for the words you kept out of the generated art.

Good alt text is a two-minute job that makes the page usable for more people and clearer to crawlers. Skipping it is one of the most common and least excusable misses on otherwise well-built sites.

07Do and don't

Do

• Use AI for decorative and conceptual images — heroes, backgrounds, blog headers, illustrations.
• Art-direct with specific medium, palette, and composition so output doesn't default to the generic look.
• Keep all legible text out of the image and add real words as captions, HTML, or SVG.
• Export modern formats, size to the slot, compress, and lazy-load below the fold.
• Confirm commercial rights and write real alt text for every meaningful image.

Don't

• Don't fake product photos, team shots, or faces attached to testimonials.
• Don't ship the first generation — generate several and edit the winner.
• Don't bake garbled text into images and hope nobody notices.
• Don't drop a giant uncompressed file into a small slot and tank your LCP.
• Don't assume a generated image is yours to use commercially without checking.

08FAQ

How do I make AI images not look fake?

Three things fix most of it: art-direct with a specific medium and palette instead of accepting the glossy default, keep all legible text out of the generated image, and vary the style across a page so it doesn't read as one batch. Then edit the winner — a crop, recolor, or grain pass pulls it off the template look.

Can I use AI images for product photos?

No — if you ship a physical product, buyers need to see the real item, and an AI render is misleading and a returns problem. The same goes for team photos and testimonial faces. AI is fine for mood and concept, wrong for anything a visitor is meant to trust as real evidence.

Are AI-generated images free to use commercially?

Not always. Terms vary by tool and plan — some grant commercial use only on paid tiers, and many give you a license rather than full ownership. Check the terms for the plan you're on before putting an image on a page that earns money, and never generate trademarked or recognizable real likenesses.

Do AI images hurt SEO or page speed?

Only if you don't optimize them. An unoptimized hero is often the Largest Contentful Paint element and can blow your Core Web Vitals. Export a modern format, size it to the slot, compress, lazy-load below-the-fold images, and write real alt text — done that way, AI images are neutral-to-helpful for SEO.

Nothing here is financial or investment advice — it's design and operating guidance from running real sites. ThemeBurn's lens is simple: judge a build by whether it converts, lasts, and is something you can actually maintain.