Sign a PDF With Your Signature

Yes, completely free. Our Sign PDF tool has no hidden costs, no watermarks, and no registration requirement. You can process as many files as you need, each up to 100MB, at no charge. We believe professional PDF tools should be accessible to everyone — students, freelancers, and businesses alike.

Your files are fully protected. All uploads and downloads use 256-bit SSL/TLS encryption during transfer. Processing happens on our isolated Hetzner server infrastructure in Germany — your file is never shared, analysed for commercial purposes, or stored longer than necessary. Every uploaded and processed file is automatically and permanently deleted within one hour of processing.

Supported file types: This tool accepts PDF files up to 100MB each. For files larger than 100MB, use our Compress PDF tool first.

Yes — works on any device. The interface is fully responsive and tested on desktop, tablet, and mobile. Touch-friendly upload areas, drag-and-drop support on desktop, and mobile-optimised buttons mean you get the same experience whether you are on a MacBook, an iPad, or an Android phone. No app download is ever required — open your browser and go.

It depends on the jurisdiction and the type of transaction. In most countries, a visible electronic signature on a PDF (a drawn, typed, or image-based signature) is legally valid for the majority of everyday business contracts, internal approvals, and commercial agreements under laws like the US ESIGN Act and the EU eIDAS Regulation (as a "simple electronic signature"). For regulated transactions — real estate transfers, wills, notarised documents, certain government filings — a qualified digital signature with a certificate from a trust service provider is required. Our tool creates simple electronic signatures only.