WhiskFile 安全工具：为您的 PDF 添加密码保护、水印和安全加密。
添加密码以保护您的 PDF
移除您拥有的 PDF 密码
添加文字或图像水印，支持平铺、页面选择和图层控制
智能或完全扁平化 — 使表单字段、注释和图层永久生效
Remove metadata, annotations, JavaScript, and hidden content from PDFs
Detect and permanently redact personal information from PDFs
AI 检测并永久修订 PII（个人身份信息）——可选择类别、添加自定义词汇
使用 5 种视图模式比较两个 PDF——视觉差异、文本差异、叠加、闪烁等
Send PDFs for electronic signature — add signers, place fields, track status
You can sign a PDF document online without printing, scanning, or installing software. The process takes under a minute:…
Password-protecting a PDF prevents unauthorised access by requiring a password to open the file. You can also restrict p…
PDFs support several security features — password protection, encryption, permissions restrictions, and digital signatur…
Legal work generates more PDFs than almost any other profession — contracts, filings, discovery documents, deeds, and co…
Unlocking a PDF removes its password protection, allowing you to edit, print, copy text, and annotate the document freel…
Flattening a PDF merges all interactive layers — form fields, annotations, comments, and digital signatures — into the s…
