A negative prompt is the text you type into a second box to tell an AI image tool what to leave out, such as "blurry, text, extra fingers". The idea comes from Stable Diffusion tools. Midjourney has its own version, the --no parameter, and chat-style tools with a single message box have none. Below is how a negative prompt steers the picture, which tools support one, how to write one, example lists you can copy, and how to get the same effect in a tool with no negative field.
Negative prompt meaning, in plain words
A negative prompt works as the opposite of your main prompt: it lists what the image should move away from, while the main prompt lists what it should move toward. The AUTOMATIC1111 Stable Diffusion web UI, whose author believes it was the first app to use the approach, describes it as a way to name the things you'd rather not see, with no extra load on the model. The wiki's author notes it became hugely popular for removing Stable Diffusion's usual deformities, such as extra limbs.
How the negative steers the image
Diffusion tools make a picture by removing noise over many steps, and at each step they compare two predictions: one guided by your prompt and one guided by an empty prompt. The difference pushes the image toward your prompt. That comparison is called classifier-free guidance, a technique from a 2022 paper by Jonathan Ho and Tim Salimans (the guide to how AI image generators work shows where it fits in the whole process). Your negative list replaces that empty prompt, so each step moves toward your prompt and away from your negative words. The web UI's own example shows a castle in a forest generated with and without negatives such as "fog" and "grainy".
Because it runs through guidance, the negative only works when guidance is on. Hugging Face's Diffusers library says its negative_prompt setting is ignored when the guidance scale is below 1.
Which AI image generators support negative prompts
Only some tools have a separate box for exclusions. In an AI image generator with one message box, a negative prompt has to live inside the description itself. As of September 2026:
| Tool | Where the exclusions go | What to know |
|---|---|---|
| AUTOMATIC1111 Stable Diffusion web UI | A separate "Negative prompt" box | Uses your negative words in place of the empty prompt |
| Hugging Face Diffusers (Python) | The negative_prompt setting | Ignored when the guidance scale is below 1 |
| Midjourney | --no, typed at the end of the prompt | Works like a -0.5 weight on those words |
| Tools with a single message box | No separate field | Describe the scene you want, including what fills the empty space |
Exclusions work the same way when you edit part of an image. Diffusers' inpainting guide uses a negative to steer a repainted area away from "bad architecture, unstable, poor details, blurry".
How to write a negative prompt
Build it from problems you can see, not from a list you found online.
- Generate the image once with no negatives, so you know what actually goes wrong.
- Name each problem as a short word or phrase: "blurry", "extra fingers", "text", "harsh shadows".
- Type them into the negative box, separated by commas. Midjourney's version goes at the end: "--no text, clutter".
- Keep the seed, size and settings the same, and generate again, so any change comes from the negative words.
- Remove any term that made no visible difference. A short list is easier to adjust later.
- If something keeps coming back, describe its replacement in the main prompt too, such as "bare white wall" for a room that keeps growing posters.
Negative prompt examples
These examples cover everyday exclusions, from painterly looks to stray lettering. The last column is the same request written for a tool with one box, where there's nowhere to put a negative.
| Goal | Stable Diffusion negative | Midjourney | One-box wording |
|---|---|---|---|
| A photo, not a painting | painting, illustration, cartoon, 3d render | --no illustration, painting | "A photo taken with a 50mm lens, natural color" |
| Sharp detail | blurry, out of focus, grainy, low resolution | --no blur | "Sharp focus, crisp detail, even light" |
| Natural skin | plastic skin, airbrushed, oversaturated | --no airbrushed | "Natural skin texture with visible pores, soft daylight" |
| An empty street | people, cars, traffic | --no people, cars | "A deserted street at dawn, every parking space empty" |
| No lettering | text, letters, words, signature | --no text, letters | "Plain, unmarked walls and blank signs" |
| A clean product shot | clutter, props, busy background | --no clutter, props | "One bottle alone on a plain white seamless background" |
| Better hands | extra fingers, fused fingers, deformed hands | Describe the pose in the main prompt | "Left hand resting flat on the table, five relaxed fingers" |
| A drawing, not a photo | photo, photorealistic, 3d render | --no photo | "Flat vector illustration with bold outlines and solid colors" |
| No frame around the picture | frame, border, vignette | --no border, frame | "A full-bleed picture that runs to every edge" |
The hands row leaves --no out on purpose. In Midjourney, write the pose you want into the main prompt instead, the same way the one-box column does; the guide to why AI is bad at hands has pose wording to borrow.
Negative prompts for realistic photos
For photorealism in Stable Diffusion, start with a short list aimed at the usual giveaways: "cartoon, illustration, painting, 3d render, plastic skin, airbrushed, oversaturated, blurry, extra fingers, text". Then trim anything your image doesn't need. A portrait with no hands in the frame doesn't need finger terms.
In a tool with one box, the same result comes from describing a real camera and real light. These three are written for Image Generator, with every exclusion turned into what should be there:
Candid photo of a man in his 60s repairing a bicycle wheel in his garage, natural skin texture with visible pores and a few age spots, soft overcast light through the open door, 50mm lens at eye level, muted true-to-life colors, slight film grain, plain pegboard wall behind him.Studio photo of a plain, unlabeled glass bottle of olive oil standing alone on a white seamless background, soft even light from above, a faint natural shadow under the bottle, sharp focus, true-to-life color.Wide photo of a quiet cobblestone street at sunrise, every doorway closed and both sidewalks empty, soft pink light on the building fronts, wet stones reflecting the sky, shot at eye level with a 35mm lens.The guide to making AI images look real covers light, lenses and skin in more depth.
Why "no" in a regular prompt can backfire
Typing "no" or "without" into a normal prompt is not the same as a separate negative field. Midjourney's documentation lists "still life gouache painting without any fruit" and "please don't add fruit" as bad prompts, and recommends "--no fruit, apple, pear" instead. Google's image generation docs for developers give the matching advice for tools without a negative field, under the name "semantic negative prompts": rather than writing "no cars", describe the scene you want, such as a deserted street with no traffic in sight.
Midjourney adds one more caution. Its moderation reads each word after --no separately, so "--no modern clothing" is read as "no modern" and "no clothing", which can trigger a content warning. Midjourney's fix is to name the clothing you do want in the main prompt.
Do you need a negative prompt generator?
Usually not. A generator hands you a long, generic list, and with 30 terms in the box you can't tell which one helped or which one flattened the colors. The web UI's own demonstration uses one to three words at a time. Start from the problems in your image, use the example table above as a menu, and keep the list short enough to test one term at a time.
For tools with one box, the more useful helper is the reverse: take each thing you want to exclude and write what should be there instead. "No people" becomes "an empty beach", and "no background clutter" becomes "a plain gray wall behind her". The AI image prompt library has starting prompts already written that way, and the guide to prompting an AI image generator covers the rest of a good prompt.
Troubleshooting negative prompts
| Problem | Likely cause | Fix |
|---|---|---|
| The negatives do nothing | Guidance scale below 1, or the tool doesn't support one | Raise guidance above 1, or rewrite the exclusion as a description |
| The excluded thing still appears | The main prompt implies it, such as "busy beach" and "no people" | Change the main prompt so it no longer calls for it |
| Colors look flat after adding a list | One of many terms is pulling the image off course | Remove terms one at a time and regenerate with the same seed |
| Midjourney shows a warning after --no | Its moderation reads each word after --no on its own | Describe what you want in the main prompt instead |
| "No text" in a one-box tool still gives text | The tool has no negative field, so the words are part of the description | Describe blank, plain surfaces instead |
Write exclusions as descriptions in Image Generator
Toybox AI's Image Generator has one box, "Describe your image", and no separate negative field, so every exclusion becomes a description of what should be there.
- Go to Image Generator. Generating needs a free Toybox account.
- Start the "Describe your image" box with the subject and where it is, then add the light and camera angle.
- For each thing you want to leave out, write its replacement: "an empty park bench" instead of "no people", "a bare white wall" instead of "no posters".
- Optional: tap a style chip such as Photorealistic, and choose a Size (Square, Portrait, Landscape, Story or Wide).
- Tap Create image. The picture usually arrives in about 30 seconds.
- If something unwanted still shows up, reword the description and run it again, or on a Pro plan type the fix into the "Want to change something?" box after the result appears.
Every Image Generator run currently costs 50 credits, and a fix in the revise box needs a Pro plan and currently costs 85 credits. See current prices for plans and top-ups.