Most disappointing AI answers come from a prompt that left out the obvious. You know your situation, so you skip it, and then the model guesses.
Paste what you would normally type. You will get it back rewritten, with a short list of what changed and why.
Free prompt improver
Paste a rough prompt, get a better one
Claude rewrites it with the parts most prompts are missing: context, one clear task, the format you want and the rules. You get the prompt back, not the answer, so you can run it wherever you like.
Improved prompt
Five improvements per person a day. We don't store what you type.
What a good prompt has
- Context: who you are, who it is for, and what is going on.
- One task: a single clear ask, starting with a verb.
- Format: the shape and length you want back.
- Constraints: tone, what to avoid, what must be included.
Once you can see the pattern, you will write better prompts without any tool. The complete guide to prompting walks through it, and the four-box prompt builder gives you the same structure to fill in yourself.
Frequently asked questions
What does it change?
It adds the four things most prompts are missing: who you are and what the situation is, one clear task, the format and length you want back, and the constraints. It also leaves [BRACKETS] where only you can fill in a detail.
Does it answer my prompt?
No. You get the improved prompt back, so you can run it in whichever tool you use.
Is it free?
Yes, with a daily limit per person because each improvement costs us a little to run. The four-box prompt builder has no limit at all.
Do you keep what I type?
No. Prompts are sent to the model to be rewritten and are not logged or stored on our side.