# Excel to CSV / CSV to Excel — 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://xlsx-csv.yeezhan.com
Skill definition: https://xlsx-csv.yeezhan.com/skill/SKILL.md
API documentation: https://xlsx-csv.yeezhan.com/api/docs

## What this tool does
Convert XLSX ↔ CSV with sheet picking and UTF-8 BOM / GBK encoding fixes — no more mojibake in Excel.

## Typical user problems
- CSV exported from Chinese Windows Excel opens as mojibake; CSV opened in Excel garbles UTF-8 Chinese without a BOM. Convert with the right encoding and sheet.

## Parameters
- mode: enum, required. 转换方向
- sheet_name: string, optional. 工作表名（Excel→CSV）. 留空使用第一个工作表
- encoding: enum, optional. CSV 编码

## 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
- CSV→Excel 每个文件生成一个工作表 Sheet1