PDF e-Sign

Popular Free Local Processing

Free online PDF e-signature tool supporting text signatures or Base64 image signatures. You can specify signature position and size. Files never uploaded, all processing in your browser. Handwritten signatures can be generated on an external signature pad and pasted as a Base64 dataURL.

Drag files here, or

Select PDF file

max each 100.0 MB

Options

Signature source

Signature page (from 1, blank = last page)

X coordinate (pt, from bottom-left)

Y coordinate (pt, from bottom-left)

Signature width (pt, scaled proportionally)

How to Use

1 Select the PDF file to sign
2 Choose signature source (Text signature / Base64 image)
3 Text signature: enter an English name (e.g. Zhang San)
4 Base64 image: draw a signature on an external pad (e.g. signature-pad.github.io), export the dataURL and paste it
5 Set signature page (blank = last page), X/Y coordinates, and width
6 Click "Sign PDF" button, then download the signed file

FAQ

Q: How do I draw a handwritten signature?

Visit an online signature pad like https://signature-pad.github.io, draw your signature, click "Save as PNG" to get the dataURL, and paste it into the Base64 image input.

Q: Does text signature support Chinese?

Currently text signature uses the Helvetica font and supports only English and digits. For Chinese signatures, we recommend drawing by hand and using the Base64 image mode.

Q: How are coordinates calculated?

The origin is the bottom-left corner of the page. X increases to the right; Y increases upward. Unit is points. A4 is 595 pt wide and 842 pt tall.

Q: Are files uploaded to the server?

No. All processing happens in your browser. Files never leave your device.

Q: Does the e-signature have legal validity?

This tool provides a visual signature (adding a signature image to the PDF) and does not have the legal validity of a digital certificate. For legally valid digital signatures, use a professional service like Adobe Sign.