Sign PDF
Add a visible electronic signature to a PDF locally, without uploading your document or creating an account.
How to Use Sign PDF
- Select a PDF, create or draw your signature, position it on the desired page, and download the signed file.
- Review the result and its visible context before using it.
- Copy, download, or save only the output you need.
Purpose & Processing Boundary
Add a visible electronic signature to a PDF locally in your browser without uploading your document or creating an account.
This tool adds a visible electronic signature mark. It is not a cryptographic certificate-backed digital signing service (PKI); verify the receiving party's legal requirements first.
Frequently Asked Questions
Can I sign a PDF without uploading it to a cloud server?
Yes. AI4Tools embeds your electronic signature directly into the PDF using client-side JavaScript (pdf-lib) without sending any file data across the internet.
What signature methods are supported?
You can draw your handwritten signature on screen, type your name with clean typography, or upload a transparent signature image.
Is an electronic signature legally binding?
Visible electronic signatures are widely accepted for everyday agreements and commercial forms, but regulated or court filings may require certificate-based digital signatures.