WhiskFile 安全工具：密碼保護、加上浮水印並確保您的 PDF 安全。
新增密碼以保護您的 PDF
從您擁有的 PDF 中移除密碼
新增文字或圖片浮水印，支援平鋪、頁面選取與圖層控制
智慧或完整平面化 — 使表單欄位、註解和圖層永久固定
Remove metadata, annotations, JavaScript, and hidden content from PDFs
Detect and permanently redact personal information from PDFs
AI 自動偵測並永久遮蔽 PII（個人識別資訊）— 可選擇類別、新增自訂字詞
比較兩個 PDF，提供 5 種檢視模式 — 視覺差異、文字差異、覆疊、閃爍等
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…
