Bảo vệ

Fingerprint PDF

Generate SHA-256/SHA-512 integrity hashes and optional recipient canary tags. Chạy trên thiết bị này

Thêm tệp của bạn

Tài liệu của bạn chỉ nằm trong thẻ trình duyệt đang mở.

Chỉ tệp PDF

Thả một tệp vào đâyhoặc chọn từ thiết bị của bạnChọn tệpChỉ tệp PDF

Choose a local file to begin.

Không có hàng đợi tải lên

Tài liệu của bạn chỉ nằm trong thẻ trình duyệt đang mở.

Không cần tài khoản

Không có đăng nhập, hạn mức xử lý hàng loạt hay kho tệp trên máy chủ.

Xoá khi xong

Hãy dùng nút xoá để giải phóng dữ liệu tác vụ ngay lập tức.

Hướng dẫn

Cách sử dụng Fingerprint PDF

Stamp a unique SHA-256 cryptographic fingerprint and recipient identifier into a PDF’s metadata and optional micro-footer.

Đầu vàoOne PDF, a recipient identifier or email tag, and whether to add a visible micro-stamp.

Kết quảOne fingerprinted PDF with SHA-256 verification metadata.

Quyền riêng tưChỉ được xử lý trong thẻ trình duyệt này.

About fingerprint PDF

Stamp a unique SHA-256 cryptographic fingerprint and recipient identifier into a PDF’s metadata and optional micro-footer. Distribute board decks, M&A teasers, investor updates, or pre-release manuscripts with per-recipient traceability.

A determined attacker who screenshots and re-types a document can strip metadata, though the visible micro-stamp remains on printed or screenshotted pages.

How PDFolio helps you fingerprint PDF

PDFolio computes the SHA-256 hash of the source bytes merged with your recipient tag using the browser Web Crypto API, writes the fingerprint into custom document keywords/subject metadata, and optionally renders a 6.5pt micro-footer along the bottom edge.

If you want to require a password to open the file, combine Fingerprint PDF with Protect PDF.

Before you download

Keep a private record mapping each recipient to their generated fingerprint ID.

When the result is ready, download it immediately and open it in your usual PDF viewer to make a final check. You can then use Clear task data to release temporary file references from this browser tab. PDFolio does not create an account, cloud folder, or server-side document history.

A private way to fingerprint PDF

PDFolio handles the selected files in the active browser tab. A Web Worker on your device performs the PDF task so the interface can remain responsive; document bytes are not sent to a PDF processing server, upload queue, account database, or advertising platform.

Các bước

Add the confidential PDF you are distributing.
Enter the recipient name, email, or copy ID (e.g., Board-Member-04).
Choose whether to include a subtle micro-footer stamp, then process and download.

Nên biết: The result message includes the exact SHA-256 digest and fingerprint token so you can log which copy was sent to each recipient.

Câu hỏi thường gặp

How is the PDF fingerprint generated?

It is computed locally using Web Crypto SHA-256 over the original PDF bytes and your recipient identifier.

Does PDFolio store a copy of the fingerprint or document?

No. Everything happens in your browser tab; copy the fingerprint hash from the completion banner for your records.

Does fingerprint PDF change my original file?

No. PDFolio creates a new file for download. Your source file remains unchanged on your device.