# Bitmap to SVG (Tracer) — 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://bitmap-to-svg.yeezhan.com
Skill definition: https://bitmap-to-svg.yeezhan.com/skill/SKILL.md
API documentation: https://bitmap-to-svg.yeezhan.com/api/docs

## What this tool does
Trace a logo or line art into SVG paths — threshold binarisation plus contour extraction, no account, no upload queue.

## Typical user problems
- A scanned logo or a hand-drawn icon only exists as pixels; every resize turns it blurry. A threshold pass separates ink from paper and a contour tracer converts each ink region into a closed SVG path that scales forever.

## Parameters
- threshold: number (range 1-255), optional. 二值化阈值. 灰度 < 阈值 视为前景（墨迹）
- mode: enum, optional. 输出模式

## 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
- Simplified single-threshold trace — no multi-colour or gradient support
- Images are downscaled to ≤600 px on the long side before tracing
- Tiny specks under 6 px² are discarded as noise