# Sign PDF Online - Add a Signature or Stamp to a PDF

> Free online PDF signing tool: drop in a handwritten signature or company stamp, drag it into place on a page preview, adjust size and opacity, then export.

- URL: https://qilingtools.com/en/pdf/sign
- Category: PDF Tools (https://qilingtools.com/en/pdf)
- Tags: [PDF](https://qilingtools.com/en/tags/pdf), [Documents](https://qilingtools.com/en/tags/document), [Productivity](https://qilingtools.com/en/tags/office)
- Last updated: 2026-10-26
- Price: Free, no sign-up
- Privacy: Runs locally in the browser; files are never uploaded

Place a handwritten signature, a company stamp or any image onto a PDF. Upload the PDF, pick your signature image, then drag it straight onto the page preview while adjusting width and opacity. Stamp a single page or every page. A transparent PNG works best so the text underneath stays readable. Your file never leaves the browser, so signatures and contract contents are not exposed to any server.

## How to use

1. Upload the PDF you need to sign
2. Choose the signature or stamp image and set width and opacity
3. Drag it into place on the preview, then click Stamp & download

## Features

- Drag to position on a live page preview
- Transparent PNG support, nothing gets hidden
- Stamp one page or every page
- Runs locally, signatures never uploaded

## FAQ

### How do I get a transparent signature image?

Sign on white paper, photograph it, then run it through our Remove Image Background tool and export a PNG to upload here.

### Is this a legally binding electronic signature?

No. This tool overlays a signature image on the PDF, which is a visual signature and carries no digital certificate. For legally binding digital signatures use a CA-backed solution.

### Are my files or data uploaded?

No. Everything runs locally in your browser with no network upload, and is discarded when you close the page.

### Do I need to sign up or pay?

No. The site is completely free, needs no account and has no usage limits.

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