No. pdf-lib and pdf.js process it in your browser.

Is this a legally binding e-signature?

It adds a visual signature. For certificate-based digital signatures use a qualified provider.

Why flatten to image?

It merges everything into page images so the signature and text cannot be moved, edited or copied.

AppHelp

Sign and stamp PDFs online, free and private

Draw a signature, place a company stamp or a usage mark like 'For visa application only', then flatten the PDF so it cannot be edited. Nothing is uploaded.

Sign and stamp a PDF

Open a PDF, draw a signature, add a stamp image or a text mark, drag them into place, then flatten and download.

No upload

Choose PDFor drop it here. Processing stays in this browser.

Common tasks

sign pdf online free
add stamp to pdf
sign pdf without uploading
flatten pdf online
add signature to pdf
pdf 盖章在线

Quick answer

Open the PDF, draw a signature or upload a stamp, add an optional text mark, drag items into place, choose a flatten mode and download.

How to use

1. Open the PDFChoose or drop the document.
2. Add and placeDraw a signature, upload a stamp or add text, then drag it into place.
3. Flatten and downloadPick a flatten mode and download the signed PDF.

Common use cases

Sign contracts and forms
Stamp company documents
Mark copies 'for … use only' before sharing ID documents

Features

Hand-drawn signature pad with ink colors
Stamp or signature image upload with white-background removal
Text marks in any language, on one or all pages
Drag, resize and set opacity
Flatten to image or keep text selectable

Frequently asked questions

Is the PDF uploaded?: No. pdf-lib and pdf.js process it in your browser.
Is this a legally binding e-signature?: It adds a visual signature. For certificate-based digital signatures use a qualified provider.
Why flatten to image?: It merges everything into page images so the signature and text cannot be moved, edited or copied.