Clean and format markdown prompts — normalize headings, fix indentation, trim trailing spaces, and collapse extra blank lines. Output updates live as you type or paste.
Formatted output updates live. All processing runs in your browser.
Frequently Asked Questions
What does the Prompt Formatter do?
It cleans markdown prompts — normalizing heading levels, trimming whitespace, fixing list indentation, and removing excessive blank lines so your prompts are easier to read and reuse.
How does heading normalization work?
The tool converts inconsistent heading styles (ALL CAPS lines, underlined titles, mixed # counts) into clean markdown headings with consistent # levels starting from H1.
Is this the same as the AI Prompt Optimizer?
No. The AI Prompt Optimizer restructures content into Goal, Context, Requirements, and Output Format. This tool formats markdown layout without changing your content.
Is my text stored or sent anywhere?
No. All formatting runs entirely in your browser.
Is this tool free and does it work on mobile?
Yes on both counts. The Prompt Formatter on draft21 is completely free with no sign-up required and works on all devices.