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Sign PDF

Draw, type, or upload a signature and place it on any page. Free and private.

Use this tool free →

NilPDF Sign lets you create a signature by drawing it, typing your name in a handwriting-style font, or uploading an image, then place it anywhere on any page of your PDF. Drag to reposition, drag the corner handle to resize, and use the duplicate button to reuse the same signature on other spots or pages. The result is a flattened PDF with the signature image permanently part of the page. This is a visual electronic signature, not a certificate-based digital signature, and NilPDF makes no guarantee that it meets the legal requirements for signing any particular document.

100% private. Your files are processed entirely inside your browser using WebAssembly. Nothing is uploaded to any server. NilPDF has no backend — there is no server to send your files to.

Frequently Asked Questions

Is signing a PDF really free?

Yes. Completely free, unlimited use, no account required.

Are my PDF files safe when I sign them?

Your files never leave your device. All processing happens in your browser using WebAssembly (Pyodide). NilPDF has no server — there is nothing to upload to.

Is this a legally binding digital signature?

No. This creates a visual signature, a picture of a signature placed on the page. It is not a certificate-based digital signature, and NilPDF makes no guarantee that it meets the legal requirements for your document. Check what your use case requires before relying on it.

Does NilPDF store my signature?

Not unless you choose to. There is an optional "remember this signature on this device" setting that saves it in your browser's local storage for reuse. It is off by default and you can remove a saved signature at any time.

Can I sign a password-protected PDF?

Yes. Enter the password when prompted and NilPDF will decrypt the file locally before you sign it.