Signature for PDF: Add an Image to a PDF

Add a signature image to a PDF form or agreement

This tool places an existing PNG or JPG signature onto a page of a PDF document. It can help with a form, approval sheet or agreement that accepts an image of a handwritten signature. Choose the page number, then set width and horizontal and vertical position before downloading.

There is no visual PDF page preview in the editor. Open the downloaded file and inspect the placement, page and scale before sending it to anyone. If the mark is too high, low or large, change the controls and export again.

Choose the right signature image

A transparent PNG usually blends best with a white or colored PDF page because no paper rectangle surrounds the handwriting. A JPG can also be placed, but its opaque background may cover printed text or lines. If your source is a paper photograph, remove its background first.

The PDF must be under 30 MB, and the signature image must be a PNG or JPG under 15 MB. A clean image with generous resolution is easier to read after resizing. Keep the signature inside the intended field rather than over nearby text.

Understand the signing boundary

The downloaded PDF contains an image overlay. It is not a certificate-based electronic signature, identity check or audit trail. If a recipient requires verified signing, use a service that provides the required authentication and legal workflow.

Your files are processed in the browser for this task. Password-protected or encrypted PDFs cannot be edited here. Keep a copy of the original document so you can compare it with the exported version. A signature for PDF use should also meet the recipient's document requirements.

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