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Sign PDF (Add Signature) - Từng Bước

Sign PDF (Add Signature) chạy theo ba bước: mở công cụ, chọn PDF và ảnh chữ ký, rồi tải file đã ký. Trang này nêu rõ từng bước cần gì.


Bước 1 - mở công cụ

Vào Sign PDF (Add Signature). Không cần cài đặt hay đăng nhập trước khi bắt đầu.


Bước 2 - chọn PDF và chữ ký

Chọn một file PDF, rồi chọn ảnh chữ ký PNG hoặc JPG. Chọn số trang và góc (góc dưới bên phải theo mặc định), rồi bấm Sign PDF. Cả hai file ở lại tab trình duyệt này - không gửi lên máy chủ.


Bước 3 - tải kết quả

Khi dòng trạng thái báo PDF đã ký sẵn sàng, bấm Download PDF để lưu signed.pdf. File gốc không được giữ sau phiên trang.

← công cụ pdf

Reviewed by the Free Tool Online editorial team · Tested in the current versions of Chrome, Firefox, Safari, and Edge before publishing. No account is needed to use any tool. Report a bug - we triage within 72 hours. · Last refreshed April 2026.

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  • Add Page Numbers to PDF - Add Page Numbers to PDF - upload a PDF, pick a starting number, and download every page stamped
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  • Signature Maker - Draw a signature with your mouse, finger, or stylus and download it as a PNG - no upload, no

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