# Convert to Black & White — yeezhan.com
> One-time pay-per-task emergency tool to make your file ready for submission.
> No credits, no balance. One payment unlocks one task result, valid for 24 hours.

Tool domain: https://grayscale.yeezhan.com
Skill definition: https://grayscale.yeezhan.com/skill/SKILL.md
API documentation: https://grayscale.yeezhan.com/api/docs

## What this tool does
True grayscale conversion — no colour cast, no colour noise.

## Typical user problems
- Some print systems, legal documents and artistic styles demand pure black-and-white. Desaturate properly with luminance-weighted conversion.

## Parameters


## Pricing
- Watermarked preview: free, no login required
- Final clean output: $0.99 one-time per task
- Require login (email/phone OTP) to complete payment
- Result available for download 24 hours after payment

## Limitations
- Max input 50 MB
- Output format follows input unless specified