PDF 時間戳記
為 PDF 文檔注入 RFC 3161 安全時間戳記。驗證文件創建時間防篡改。
上傳待签名確權 PDF
關於此工具
Timestamp PDF adds a local timestamp certificate to your PDF documents, creating a self-signed proof that a document existed at a specific point in time.
The timestamp is generated locally in your browser using a self-signed certificate. This is not an RFC 3161 trusted timestamp from a certificate authority — it serves as a personal record of when the document was processed.
All processing happens entirely in your browser. Your documents never leave your device.
使用方法
Upload PDF Document
Select the target PDF file you want to timestamp.
Apply Local Timestamp
Click to generate a self-signed timestamp certificate and embed it in the PDF.
Download
Download the timestamped PDF with the embedded certificate.
使用場景
Intellectual Property
Establish clear priority proof of patents, drafts, and ideas before public release.
Financial Auditing
Provide certified tamper-proof logging of ledger archives and balance reports.
Legal Contracts
Lock legal agreements with a trusted time proof to avoid backdating arguments.
常見問題
What type of timestamp is this?
This is a local self-signed timestamp generated in your browser. It is not an RFC 3161 trusted timestamp from a certificate authority — it serves as a personal record of when the document was processed.
Do I need a certificate?
No. The tool automatically generates a self-signed certificate locally. No external certificates are required.
Does my document leave my device?
No. All processing happens entirely in your browser. Your documents are never uploaded anywhere.