# Redact PDF (True Blackout) — 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://redact-pdf.yeezhan.com
Skill definition: https://redact-pdf.yeezhan.com/skill/SKILL.md
API documentation: https://redact-pdf.yeezhan.com/api/docs

## What this tool does
Find phone numbers and ID numbers by regex, black them out and rasterise — the text is really gone.

## Typical user problems
- Drawing a black rectangle over text leaves it copy-pasteable underneath. We locate sensitive strings, paint them out, then rasterise every page so the original text layer no longer exists.

## Parameters
- patterns: string, required. 涂黑规则（正则，逗号分隔）. 默认匹配手机号 / 身份证号
- pages: string, optional. 处理页. all 或 '1,3' / '2-5'

## Pricing
- Watermarked preview: free, no login required
- Final clean output: $2.99 one-time per task
- Require login (email/phone OTP) to complete payment
- Result available for download 24 hours after payment

## Limitations
- Text-layer PDFs only (no OCR in this tool)
- Regex sees one visual line at a time — a number split across a line break is missed
- Output pages are rasterised (selectable text is removed on every page)
- Complex layouts (rotated text, tables) — always review the preview; recommend manual spot-check before submitting