PDF SIGN
Stamp your signature onto a PDF.
Load a PDF, then upload a signature image (transparent PNG works best) or type a text stamp, and overlay it on all or selected pages. Adjust position, size and opacity; the result stays editable.
Drop or choose a PDF
Processed locally, never uploaded
Processed locally in your browser
How do I use this?
Choose a PDF and a signature image (or text stamp), set which pages to overlay plus position, size and opacity, then click stamp to download. Transparent PNG is best for images; pick a color for text stamps. Everything stays local. To make a red seal first, use the site’s “电子印章” tool then upload it.
FAQ
Which format should the signature image be?
A transparent PNG looks best. JPG has no alpha channel, so it drags a rectangular white background around your signature. If your handwritten signature was photographed as a JPG, knock the background out first and export a PNG.
Can I sign only certain pages?
Yes. Choose all pages or a page list such as 1,3,5-7. Contracts often get signed on the last page or every page, but a page range is more precise.
Can I still edit the PDF afterwards?
Yes. The tool overlays the signature into the page content and the export is an ordinary PDF you can keep adding text to, deleting pages from or editing metadata on. What is baked in becomes part of the page, though, so that layer cannot be pulled back out on its own.
I have no handwritten signature, can I use a text stamp?
Yes. Type any text to create a text stamp and pick a colour. For a more formal red seal, generate a transparent PNG with the e-seal tool and upload that as the signature image instead.
Are my signature and PDF safe?
Everything runs locally in your browser; neither the PDF nor the signature image is uploaded. Note that this overlays a layer, which is not a certificate-based digital signature, so legally recognised signing has to be handled separately.
使用步骤How to use
- 上传 PDF 与签名图片（可手写后拍照）Upload the PDF and a signature image
- 拖动签名到目标位置，调整大小Drag the signature into place and resize it
- 导出带签名的 PDFExport the signed PDF