PDF 签名
在 PDF 文件上添加您的签名
File
—
Pages
0
Selected page
0
上传一个 PDF 文件
选择要签名的 PDF
使用方法
上传您的文件
拖放文件或点击浏览。您的文件留在浏览器中。
调整设置
配置选项以获得您所需的精确结果。
下载结果
即时处理并下载您的文件——无需等待，无需上传至服务器。
为什么使用此工具
100% 免费
没有隐藏费用，没有付费等级——所有功能完全免费。
无需安装
完全在浏览器中运行。无需下载或安装任何软件。
隐私且安全
您的数据永远不会离开您的设备。不会上传至任何服务器。
支持移动设备
完全响应式设计——在手机、平板或桌面电脑上均可使用。
您的文件保持私密
此工具完全在您的浏览器中处理文件。不会上传至任何服务器——您的数据永远不会离开您的设备。
- 无服务器上传——100% 客户端处理
- 不存储数据——关闭标签页时文件即被丢弃
- 无需账号——无需注册即可立即使用
How to Sign a PDF: Add Digital Signatures to Documents
Key Points
- Draw, type, or upload an image of your signature directly onto PDF pages
- Position and resize signatures precisely on any page of the document
- Visual signatures are added client-side—no documents leave your browser
Signing PDFs digitally eliminates the need to print, sign by hand, and scan documents back. Whether you're signing contracts, approval forms, or letters, adding your signature directly to a PDF is fast, professional, and environmentally friendly.
100%
Private · No server upload
Common Use Cases
Contracts & Agreements
Sign rental agreements, freelance contracts, or NDAs without printing. Place your signature on the designated line and send back immediately.
Approval & Authorization Forms
Managers can sign off on purchase orders, leave requests, or expense reports digitally, speeding up approval workflows.
Letters & Correspondence
Add a personal signature to business letters, recommendation letters, or official correspondence for a professional touch.
Real Estate & Legal Documents
Sign offer letters, disclosure forms, and closing documents remotely, reducing turnaround time in time-sensitive transactions.
Signing Tips
Use a dark color (black or dark blue) for your signature to ensure it's clearly visible when printed.
Draw your signature with a stylus or mouse for the most natural-looking result.
Save your signature image for reuse across multiple documents to maintain consistency.
Note: visual signatures indicate intent to sign but may not carry the same legal weight as cryptographic digital signatures in all jurisdictions.
Signatures are added locally in your browser. No documents are uploaded to any server. Visual signatures indicate intent to sign; consult legal counsel for documents requiring certified digital signatures.