Sign PDF
在浏览器中使用「Sign PDF」完成文字与文档相关任务；输入内容和结果默认在设备上处理。
LOCAL VISIBLE PDF SIGNATURE
Add one visible signature to a local PDF
Draw a signature, type a name, or use a signature image. The downloaded copy is a real PDF created in your browser.
使用步骤
如何使用
- Choose one local PDF up to 25 MB and 100 pages.
- Select a page, a placement corner, and a handwritten, typed, or image signature.
- Create the visible signature and download the new PDF copy.
Visible mark only
This tool adds a visible handwritten drawing, typed name, or signature image to one selected page. It creates a new application/pdf file locally. It does not create a certificate-based digital signature, verify identity, prove consent, prevent later changes, or establish legal validity.
Private, bounded local processing
The selected PDF and signature stay in the current browser. Nothing is uploaded, stored, or sent to a server. PDFs are limited to 25 MB and 100 pages. Signature images are limited to 4 MB and 12 megapixels so the browser can keep processing bounded.
Protected and complex PDFs are refused
Password-protected or encrypted PDFs, PDFs that already contain a signature, and PDFs with XFA forms are refused. The tool does not bypass passwords, invalidate a prior signature, flatten complex forms, or attempt to repair a damaged PDF.
常见问题
你可能还想知道
Is this a digital signature?
No. It places a visible signature mark only. It does not issue or use certificates, verify identity, make a tamper-evident record, or determine whether the result is legally binding.
Is my PDF uploaded?
No. The PDF, drawing, typed name, and image are processed only in your browser and are not sent to a server.
Why was my PDF refused?
The file may be encrypted, password-protected, already signed, an XFA form, damaged, unsupported, larger than 25 MB, or longer than 100 pages. Remove protection only if you are authorized to do so, then use an appropriate PDF workflow.
Can I add more than one signature?
This first version adds one visible signature to one selected page each time. Download the result and repeat only when the document workflow permits it.