Free AI Prompt Improver
Turn a rough request into a proper instruction
Most people type prompts the way they text a friend: short, vague and full of assumptions. Friends fill the gaps from shared context. An AI has none of that, so it guesses, and the guess is often not what you wanted. This free AI prompt improver takes your rough prompt and rewrites it into a clear instruction, adding a role, context, the task, constraints and an output format only where they help. It keeps every fact you gave and does not invent requirements. It also lists what it changed and offers short tips for using the result.
Three before and after examples
A chat assistant
Before: write a blog post about saving money. After, in outline: a role of personal finance writer, an audience of young adults with a first salary, six to eight specific tips with short examples, a friendly tone, headings for each tip, about 900 words, and a rule not to recommend financial products.
An image generator
Before: a cat in a garden. After, in outline: the subject and its pose, the setting and time of day, the lighting, the style, such as soft watercolour, the framing and the aspect ratio.
A coding assistant
Before: fix my login bug. After, in outline: the language and framework, what the code should do, what happens instead, the error message, and a request to explain the cause before suggesting changes.
Choose who the prompt is for
| Target | What the improver emphasises |
|---|---|
| Any AI assistant, ChatGPT, Claude, Gemini | Role, context, audience, format and length |
| Image generator | Subject, setting, style, lighting, composition |
| Coding assistant | Language, existing code, expected behaviour, constraints |
For image prompts, plan the size with the AI image size tool.
Read the list of changes
The tool does not just hand you a longer prompt. It tells you what it improved and why, in a few short points. That list is how you learn: after a few uses, you will start adding the same missing pieces yourself. The tips explain how to use the improved prompt well, for example by asking for one change at a time when you refine the answer.
Edit the result before you use it
- Delete any default you disagree with, such as a length you do not want.
- Replace general words with your real details.
- Check that no required fact was dropped.
- Keep it in the same language as your original, which the tool does by default.
Iterate in small steps
After the first answer, do not rewrite everything. Reply with one specific adjustment, such as make the second section shorter or give a concrete example for the third tip. Use Use as input to improve the prompt again if the whole direction needs to change. Save prompts that worked, so you can reuse them with new details.
Choosing the target AI
Pick who the prompt is for, because good prompts differ. Any AI assistant, ChatGPT, Claude and Gemini get a clear instruction with role, context and format. Image generator turns your idea into a visual description with subject, style, lighting, composition and aspect ratio. Coding assistant adds the language, inputs, outputs, constraints and how errors should be handled. If you are unsure, the general option is a safe choice.
Improve it again, or use it as input
If the first result is close but not right, Improve it again produces another version from the same rough prompt. Use as input moves the improved prompt into the box, so you can add a detail you forgot or change a direction and run it through a second time. Two rounds are usually the most that help. After that, take the prompt to your AI tool and refine the conversation there.
How it works, and your privacy
Your rough prompt is sent to Google’s Gemini model, which writes the improved version, and this site does not save it. Each visitor has a limited number of free uses per day. Do not put passwords, keys or private data into prompts here or in any AI tool. If you would rather build a prompt from a form, try the prompt generator.
FAQ
It rewrites a vague request into a clear prompt with context, constraints and an output format, so AI tools give better answers.
No. It keeps your goal and facts and does not invent requirements. Review the suggested defaults, such as length, and edit them.
Yes. Choose Image generator so the prompt focuses on visual details.
Yes. The improved prompt is written in the same language as your original.
No. It is sent to the AI model to improve and is not saved by this site.
Use Any AI assistant if you are not sure. Choose Image generator for pictures and Coding assistant for programming help.