Is the prompt improver free?
Yes — free, no sign-up. Paste a rough request and get improved prompts right away.
Why are there different versions for Claude, GPT and Gemini?
Each model responds best to slightly different phrasing and structure. The tool tunes the wording for each so you can paste the right version into the model you're using, rather than a one-size-fits-all prompt.
Does it invent details about my task?
No. It sharpens your wording and structure and leaves [blanks] for your specifics — it never makes up facts about your business or request.
What's the JSON version for?
It's a structured prompt you can drop into an app, script or API call where you need consistent, parseable output rather than free-form text.