Free AI Image Prompt Generator
Type an idea, pick a style, lighting, and aspect ratio, and get a detailed, model-ready prompt in one click. Copy it into any AI image tool — or generate it free right here in Leaxor.
What is in the image? Be concrete — the more specific, the better the result.
a lone astronaut standing on a red desert dune, photorealistic, ultra-detailed, shot on a full-frame camera, natural skin and textures, warm golden-hour sunlight, long soft shadows, glowing rim light, 16:9 widescreen composition, YouTube thumbnail framing, clear focal subject with negative space for text, highly detailed, sharp focus, professional quality.
Updates live as you change the controls. Paste it into Leaxor's Image mode — or Midjourney, Flux, or Stable Diffusion — to generate it.
Skip the copy-paste.
Generate this image free in Leaxor — 50 credits a month, no card.
Example prompts to steal
Three creator-ready prompts you can copy, tweak, and generate.
YouTube thumbnail — finance
Best with Ideogram v3 (legible text) or Flux 2 Pro
A shocked young man clutching a falling stock chart, glowing red arrow, 16:9 widescreen composition with negative space on the left for a bold headline, photorealistic, dramatic high-contrast studio lighting, vivid colors, highly detailed, sharp focus, professional quality.
9:16 reel still — history
Best with Seedream 4.5 or Imagen 4 Ultra
An ancient Roman general overlooking a burning city at dusk, 9:16 vertical composition centered for mobile, cinematic film still with anamorphic lens and shallow depth of field, warm golden-hour sunlight with long shadows, highly detailed, sharp focus, professional quality.
Channel banner — tech
Best with Recraft v4 (vector) or Nano Banana Pro Ultra
A sleek isometric workstation with floating UI panels and soft gradients, 16:9 widescreen composition with clear focal subject and space for a logo, flat vector illustration with bold shapes and clean edges, soft diffused daylight, minimal background, highly detailed, professional quality.
How to write an image prompt that actually works
Every strong prompt is built from five ingredients. Nail all five and the model has nothing left to guess.
01
Subject
What the image is of — the focal object, character, or scene. Concrete beats abstract: 'a shocked man dropping a stock chart' beats 'someone surprised about money'.
02
Style
The visual language — photoreal, cinematic, 3D, anime, illustration, or digital art. This one word decides whether you get a photo or a painting.
03
Lighting & mood
Golden hour, studio softbox, neon night, dramatic chiaroscuro. Lighting does more for the feel of an image than any adjective like 'cool' or 'epic'.
04
Composition
Aspect ratio and framing — 16:9 for thumbnails, 9:16 for reels, plus focal point and negative space. It's where the subject sits, not just what it is.
05
Detail
Textures, colour, camera, sharpness. The specifics that turn a generic result into a scroll-stopper: 'high contrast, 8k, shallow depth of field'.
Which model for which prompt
Leaxor puts seven leading image models behind one prompt box — every one costs a single credit, so switching to the right model never costs extra.
Flux 2 Pro
The crisp, photoreal default. Reach for it first — great prompt adherence and clean high-res output.
Nano Banana Pro Ultra
Top-end quality when you want maximum fidelity and realism.
Seedream 4.5
Cinematic, moody shots with film-still atmosphere.
Imagen 4 Ultra
Google-grade photorealism and accurate detail.
Recraft v4
Illustration and clean vector art — logos, banners, flat graphics.
Ideogram v3
The one to pick when your image needs legible text — thumbnail titles, posters.
HiDream
Fast and cheap for quick iterations and drafts.
Want the finished picture, not just the prompt? Generate it free in the dashboard — 50 credits a month, no card, no Discord.
Prompt recipes for creators
Three quick formulas that map to what faceless creators actually publish.
YouTube thumbnail
Emotion + focal subject → 16:9 → high contrast + negative space for text → photoreal or dramatic style. Pick Ideogram v3 when you need words baked in.
9:16 reel art
Single subject centered for mobile → 9:16 → cinematic or moody lighting → keep the background simple so it reads at a glance.
Channel banner
Wide scene or motif → 16:9 → flat vector or clean illustration → leave room for a logo. Recraft v4 shines on graphic, on-brand looks.
Frequently asked questions
What is an AI image prompt generator?
It's a tool that turns a plain idea into a detailed, structured text prompt an AI image model can actually use — specifying subject, style, lighting, composition and detail. Better prompt in, better image out. Leaxor's builder writes that prompt for you, then lets you generate the image in the same place.
Is this AI image prompt generator free?
Yes. The builder is free with no sign-up. And unlike tools that just hand you a string for Discord, you can turn the prompt into a finished, high-res image right here — Leaxor's free tier gives you 50 image credits a month, no card required.
What makes a good AI image prompt?
Five ingredients: the subject (what it is), the style (photoreal, anime, 3D, cinematic), the lighting (golden hour, studio, neon), the composition (close-up, wide, 9:16), and concrete detail (textures, mood, colour). Vague prompts get vague images — specificity is the whole game.
Does this work with Midjourney, Flux and Stable Diffusion?
Yes — the prompts are written in clean, portable natural language, so you can paste them into Midjourney, Flux, Stable Diffusion or DALL·E. But you don't have to leave: Leaxor runs 7 models in-browser (Flux 2 Pro, Nano Banana Pro Ultra, Seedream 4.5, Imagen 4 Ultra, Recraft v4, Ideogram v3, HiDream) so you can generate the result instantly.
How do I write a prompt for a YouTube thumbnail?
Lead with the emotion and focal subject, set a 16:9 aspect ratio, ask for high contrast and a clear focal point, and name a punchy style (bold, photoreal, dramatic lighting). The builder has thumbnail-ready presets, and Ideogram v3 is the model to pick when your thumbnail needs readable text baked in.
Which model should I generate with?
Flux 2 Pro is the crisp, photoreal default. Pick Nano Banana Pro Ultra for top-end quality, Seedream 4.5 for cinematic looks, Imagen 4 Ultra for Google-grade photoreal, Recraft v4 for illustration and vector, Ideogram v3 when you need legible text, and HiDream when you want fast and cheap. Every model costs 1 credit per image.
More free creator tools
Got your prompt?
Now make the image.
Paste it into Leaxor's Image mode and generate a finished, high-res still with any of 7 models. Free tier: 50 images a month, 1 credit each, no credit card.
Generate it freeExplore the AI image generator, or compare credits and plans.