保护PDF
展平并锁定您的PDF — 将表单字段和注释烘焙到文档中以防止编辑。
文件保留在您的设备上
100%基于浏览器
无需账户
Drop your PDF to protect
Supported: PDF (up to 100.0 MB)
常见问题
PDF保护是如何工作的？
我们展平所有表单字段和注释，将它们合并到页面内容中。这可以防止他人编辑表单数据。
Common Use Cases
Confidential business documents
Password-protect financial reports, contracts, or strategy docs before sending via email or file sharing.
Personal records
Encrypt tax returns, medical records, or ID scans before storing them in cloud storage for an extra layer of security.
Client deliverables
Protect design files, consulting reports, or legal documents sent to clients — ensure only the intended recipient can open them.
Form locking
Use Flatten mode to lock filled form fields and annotations, preventing further editing while keeping the document viewable by anyone.