AI Prompt Formatter
Paste a prompt written in one long paragraph or as quick notes, and get it back neatly organised. The formatter recognises labelled sections such as “Role:” or “Rules:”, or sorts sentences by typical phrasing – “You are…” goes to Role, “Answer as a table” to Output format, “Do not…” to Constraints, “under 400 words” to Length. It tidies spacing and capitalisation, numbers the rules and outputs Markdown, XML tags, plain labels or a JSON object.
- Runs in your browser
- No sign-up
- Free to use
How to use AI Prompt Formatter
- Paste your prompt.
- Choose a layout.
- Check where each sentence landed.
- Copy the formatted prompt.
AI Prompt Formatter features
Section detection
Labels or typical phrasing.
Four layouts
Markdown, XML, plain, JSON.
Tidy text
Spacing and capitals.
Numbered rules
Optional.
Missing parts
Lists what is not there.
Private
Built in your browser; nothing is sent to an AI service.
When to use AI Prompt Formatter
- Cleaning prompts before sharing them.
- Converting prompts to XML for Claude.
- Storing prompts as JSON in apps.
- Reviewing colleagues’ prompts.
AI Prompt Formatter FAQ
Does it change my meaning?
No. It only moves and tidies sentences; check that each landed in the section you intended.
Why JSON?
Applications often store prompt parts as fields so they can be combined and versioned.
Markdown or XML tags?
Both work with modern models. XML tags such as <task> and <context> are recommended by Anthropic for Claude and help any model separate instructions from data; Markdown headings are easier to read.
What if it misplaces a sentence?
Add labels like “Context:” to your prompt and run it again; labels always win.
Why formatting matters
A wall of text hides instructions. When rules, context and the requested format are clearly separated, both people and models read them more reliably.
Formatting also makes prompts easier to maintain: you can change the audience or the length without rewriting everything.
This tool does not call an AI model. It turns your answers into a well-structured prompt in your browser, so it costs nothing, works offline once loaded and never sends your text anywhere. Paste the result into ChatGPT, Claude, Gemini, Copilot or any other assistant, or into the system message of an API call.
Good prompts are specific about the task, the context the model cannot know, the audience and the shape of the answer. The fields on this page cover exactly those parts; leave optional fields empty when they do not apply, and the prompt stays short.
Review the answer you get: language models can be confidently wrong, especially about facts, numbers, names and recent events. Ask for sources or mark claims to check, and keep personal or confidential data out of prompts unless your organisation allows it.