Add a signature image to a PDF — transparent PNG, no upload

PDFixer lets you place a handwritten signature image on any existing PDF page. Take a photo of your signature, remove the background in one click and position it exactly where it belongs. No browser upload, no Adobe account, no subscription.

The document stays on your own Windows PC throughout the entire process.

Download PDFixer from Microsoft Store

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PDFixer — add a signature image to a PDF on Windows

What is a signature image for PDF use

A signature image is a digital file — usually a PNG with a transparent background — that contains only the handwriting from your physical signature. You place it on a PDF page the same way you would place a photo or logo.

PDFixer creates this image automatically. Write your signature on white paper, photograph it with your phone, import the photo into PDFixer and the software removes the paper background. The result is a clean, reusable transparent PNG you can save as a preset and use on future PDFs.

This is not a cryptographic digital signature and it does not carry legal certification. It is a visible handwritten image placed precisely on a PDF page. For most practical purposes — offers, forms, internal approvals, correspondence — that is exactly what is needed.

Phone photo of a handwritten signature before background removal

Before
a phone photo on paper

Transparent signature PNG ready to place on a PDF

After
a reusable transparent signature PNG

From photo to signed PDF in seven steps

Write your signature clearly on white paper.
Take a sharp photo with your phone.
Send the photo to your Windows PC (email or WhatsApp).
Open your PDF in PDFixer.
Import the photo and use the transparent signature tool to remove the background.
Place the signature image on the correct PDF page and adjust the size and position.
Save the PDF locally. Optionally save the signature as a preset for future use.

No Photoshop, no browser upload and no Adobe account. The entire process takes under two minutes once the preset is saved.

Signature image on an offer or contract

Place your handwritten signature exactly on the signature line. The PDF stays on your PC. Nothing is uploaded.

Convert an image to a digital signature

Import any handwriting photo and PDFixer strips the background. The result is a transparent PNG you can reuse on any PDF.

Transparent PNG signature maker for Windows

PDFixer saves your signature as a transparent image preset. One click to place it on the next document.

Why a local signature image tool is safer

Online signature tools are convenient for low-risk documents. They are a poor choice when the PDF contains customer data, financial details, contracts, personnel information or anything confidential.

PDFixer runs entirely on Windows. The PDF never leaves your machine. That makes it the right tool for accountants, legal support staff, office administrators and small business owners who handle sensitive documents daily.

Signature image versus electronic signature

An electronic signature platform — DocuSign, Adobe Sign, Foxit eSign — uses cryptographic certificates and identity verification. Those tools exist for legally binding workflows that require audit trails.

PDFixer does something different and simpler: it places a visible handwritten image on a PDF page. No certificate, no identity check, no account. For the majority of everyday signing tasks, that is exactly what is needed and far faster than a formal e-signing flow.

Read the PDFixer FAQ for more details

Also need a stamp or approval mark on a PDF?

PDFixer can also add approval stamps, paid marks, reviewed marks and checked marks to existing PDF pages. The workflow is the same: import the stamp image, remove the background if needed, position it and save locally.

Add a stamp to a PDF with PDFixer

Open PDFixer

These links point directly to the PDFixer website so Google can follow them from this already-indexed domain.

Typical tasks on this page

Add a signature image to a PDF
Create a transparent signature PNG from a photo
Convert a handwriting image to a digital signature
Make a signature PNG maker on Windows
Place a digital signature from an image on a PDF
Remove the background from a signature photo
Save a reusable signature preset for future PDFs

FAQ about adding a signature image to a PDF

Short answers for people comparing tools or deciding whether PDFixer fits their workflow.

Can I use a phone photo as a signature image in a PDF?

Yes. Import the photo into PDFixer and use the transparent signature tool to remove the white paper background. The result is a clean PNG you can place directly on any PDF page.

What is a transparent signature PNG?

A transparent signature PNG is an image file where the background has been removed so only the handwriting is visible. When you place it on a PDF page the document colour shows through instead of a white rectangle.

Is this the same as an electronic signature?

No. An electronic signature uses a cryptographic certificate and is tied to a verified identity. PDFixer places a visible handwritten image on a PDF page. It is not a certified eSignature platform.

Does my PDF get uploaded to make the signature transparent?

No. PDFixer runs locally on Windows. Neither the PDF nor the signature photo is uploaded to any server or cloud service.

Can I reuse the same signature image on multiple PDFs?

Yes. PDFixer lets you save the transparent signature as a preset. On the next document you open the preset in one click and position it on the page.

Can PDFixer also add a stamp or approval mark?

Yes. PDFixer can add stamps, approval marks, images and text to any existing PDF page. The workflow is identical to placing a signature image.

Try PDFixer — add your signature image to a PDF in minutes

Download PDFixer through the Microsoft Store installer. Free 14-day trial. One-time payment. No subscription.

Download PDFixer from Microsoft Store