MidJourney Prompt Generator
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Last reviewed
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Add missing citations, update stale details, or suggest a clearer explanation.
MidJourney Prompt Generator is a generic category name that refers to the broad class of tools, custom GPTs, and prompt templates that help users compose effective text prompts for Midjourney, the generative AI image generation service. There is no single canonical product with this name. Multiple unrelated tools and community-built ChatGPT custom GPTs use variations of the title "Midjourney Prompt Generator," and many guides describe how to turn ChatGPT itself into a prompt generator for Midjourney through a system prompt.
Midjourney turns a written description, called a prompt, into images. A prompt generator is any aid that helps a person write that description well. In practice the category covers three overlapping things: conversational assistants such as ChatGPT instructed to expand a short idea into a fully formed Midjourney prompt, purpose-built custom GPTs and web apps that wrap the same idea behind buttons and dropdowns, and static templates that spell out the order in which to list subject, style, lighting, and parameters.
People reach for these tools because writing a good prompt is a skill, and the gap between a vague description and a precise one shows up immediately in the output. A generator lowers that barrier by suggesting vocabulary (lens names, art movements, lighting terms) that a newcomer may not know, and by remembering Midjourney's parameter syntax so the user does not have to. The activity sits within prompt engineering, the broader practice of phrasing inputs to get better results from a model, applied here to text-to-image generation.
A prompt generator only produces text. It does not call Midjourney or create the image itself; the user still copies the generated prompt into Midjourney (historically a Discord bot, now also a web app) to render it.[1]
A strong Midjourney prompt usually layers a few kinds of information, then ends with parameters. A common ordering is subject, then medium or style, then lighting, then composition and camera, then technical parameters. For example: "a weathered fisherman mending a net, oil painting, golden hour light, low-angle close-up, shallow depth of field --ar 4:5 --stylize 250".
The descriptive part carries most of the weight:
Parameters are options that fine-tune how Midjourney handles the prompt. They are written with a double hyphen and always go at the end of the prompt, after the descriptive text.[2] The most commonly used parameters in current model versions are below.
| Parameter | Syntax | Accepted values | Default | What it does |
|---|---|---|---|---|
| Aspect ratio | --ar (or --aspect) | width:height, e.g. 1:1, 16:9, 4:5 | 1:1 | Sets the shape of the image.[2] |
| Version | --v (or --version) | model numbers such as 7; --niji for the anime-focused model | 7 | Chooses which Midjourney model renders the image.[2][3] |
| Stylize | --stylize (or --s) | 0 to 1000 | 100 | How strongly Midjourney applies its own default aesthetic; higher is more stylized, lower is more literal.[4] |
| Style | --style | model-specific values such as raw | model default | Switches between aesthetic modes; --style raw reduces Midjourney's automatic beautification.[2] |
| Chaos | --chaos (or --c) | 0 to 100 | 0 | How varied the four initial images are; low values give similar results, high values give wildly different concepts.[2] |
| Negative | --no | any terms, e.g. --no text | none | Tells Midjourney what to leave out of the image.[2] |
| Weird | --weird (or --w) | 0 to 3000 | 0 | Pushes toward experimental, unconventional aesthetics.[2] |
| Quality | --quality (or --q) | 1, 2, 4 in V7 | 1 | Trades GPU time for detail; there is no --q 3 in V7.[5] |
| Tile | --tile | flag | off | Produces seamless, repeating patterns.[2] |
| Seed | --seed | a number | random | Fixes the starting noise so results are more reproducible.[2] |
Midjourney also supports reference parameters that point at images rather than describing them in words, including style reference (--sref, with strength set by --sw) and, in recent versions, omni-reference (--oref) for carrying a consistent character or object across images.[2][6] These require a URL or uploaded file, so a good generator emits them only when the user supplies a reference image.
Two caveats keep this section accurate. Midjourney changes its models and parameters often, so the exact defaults above are tied to the current generation rather than fixed forever. As of mid-2026, V7 is the standard production model, with newer V8 and V8.1 models having appeared in alpha testing (V8 in March 2026 and V8.1 shortly after, the latter introducing higher-resolution HD output by default).[3][7] Not every parameter applies to every model version, and older parameters are sometimes dropped or renamed between releases.
The most popular "Midjourney prompt generator" is not a dedicated product at all but ChatGPT given the right instructions. The standard recipe is to paste a system prompt or setup message that tells the model it is a Midjourney prompt assistant, teaches it Midjourney's format and parameter syntax (often copied straight from the official documentation), and asks it to expand a brief idea into one or more complete prompts.[8] A well-known open template, the "ChatGPT Midjourney Prompt Generator," constrains the conversation to predefined commands such as starting the mode, requesting prompts, and accepting or rejecting a suggestion, so that the model reliably returns ready-to-paste prompts rather than chatty prose.[9]
OpenAI's custom GPTs feature packages this same idea into shareable bots. Because anyone can create one and name it, a search of the GPT directory returns many different bots called some variant of "Midjourney Prompt Generator," built by unrelated authors and varying widely in quality and in which Midjourney version they target.[8] This is the core reason the name is a category rather than a product: the title is descriptive, not trademarked, so it recurs across countless community creations. When choosing one, it helps to confirm that the bot is up to date with the Midjourney version you actually use, since a GPT tuned for an older model may emit deprecated parameters.
Beyond ChatGPT, a number of standalone web tools and browser extensions market themselves as Midjourney prompt generators or "prompt builders." As a category they tend to offer the same kinds of features: form fields or dropdown menus for subject, style, lighting, and mood; toggles or sliders that translate into the parameters above; libraries of example prompts to remix; and sometimes a randomizer for brainstorming. Some are free and ad-supported, others sit behind a subscription, and many overlap heavily in functionality because they are all wrappers around the same prompt-writing logic.
The simplest tools in this space are not software at all but written templates and "prompt formulas," shared in guides and cheat sheets, that lay out a fill-in-the-blank structure (subject, style, lighting, composition, parameters). These cost nothing and travel well, but they put the work of choosing vocabulary back on the user. Because specific products in this category come and go quickly and frequently rebrand, this article describes the category rather than endorsing or detailing any single named tool.
A few habits make prompt generators more useful:
--seed when you want to compare small changes.[2]-- flag can be ignored or misread.[2]The limitations are worth keeping in view as well. A prompt generator cannot guarantee a given result, because image models are probabilistic and the same prompt can produce different outputs. It also cannot grant capabilities the underlying model lacks: no amount of clever phrasing will make Midjourney reliably render long passages of text, count objects precisely, or reproduce a specific real person on demand, and these constraints shift with each model version. Finally, accuracy depends entirely on the tool being current. A generator that has not been updated for the latest Midjourney version may confidently produce prompts that use parameters which no longer exist.