Is this a legally binding digital signature?

No, and this is worth being clear about. It places a picture of a signature onto the page. It is not a cryptographic signature and does not certify who applied it or prove the document has not changed since. Where you need that, use a qualified e-signature provider.

How do I get a signature image?

Sign a sheet of white paper, photograph it, and run it through Remove Background to get a transparent PNG.

Can I place it precisely?

Choose a corner and adjust the width and margin. For anything more exact, the margin control moves it in one-point steps.

Will it work on a protected PDF?

Not while it is locked. Remove the password with Unlock PDF first.

Sign PDF

Place a signature image, stamp or logo onto your document.

Drop your file here

Choose File

PDF · Upload a file up to 100 MB

Your files are secure and private. Everything is processed on your device.

Draw, type cursive, or upload transparent PNG signatures
Add auto-dates, custom dates, initials, text and legal stamps
100% private in browser — zero server uploads

Browser-First Privacy Guarantee

Your PDF documents, signatures, initials, dates, and stamps are processed 100% locally in your browser using WebAssembly and PDF.js. No document data is ever sent to or saved on any server.

How it works

Upload the documentThe PDF you need to sign.
Add your signature imageA photo or scan of your signature, ideally a transparent PNG.
Place and downloadPick the page and corner, then download the signed PDF.

What this tool does

Transparent PNG signatures keep their transparency
Sign the last page, the first, every page, or a specific range
Adjustable size, margin and opacity for stamps and watermark-style marks
Contract never leaves your device — no third party sees what you signed

Supported formats

Maximum file size: 100 MB.

Frequently Asked Questions

Privacy and security

Your file is read directly from your device and processed in your browser. It is never uploaded to a server, so there is no copy for us to keep, share or lose. Closing the tab discards everything. If you want to check this yourself: open your browser’s developer tools, switch to the Network tab, and use the tool — you will see no request carrying your file or input leave the page.

Related tools

View all tools →

PDF WatermarkStamp a text watermark across every page.Protect PDFAdd a password and encrypt your PDF.Remove BackgroundClear a solid background and export a transparent PNG.PDF Page NumberingAdd page numbers exactly where you want them.Merge PDFCombine multiple PDFs into one file, in the order you choose.