About PDFYay

PDFYay is a free tool for signing and filling PDF documents. Unlike most online PDF services, we never upload your file. Everything — opening the document, adding your signature, and exporting the signed PDF — happens locally inside your web browser using WebAssembly. Your document never touches a server, because there is no server in the loop.

Our principles

• Free forever. Every feature is free, with no account and no watermark. We cover our costs with unobtrusive advertising.
• Private by design.Your files are processed on your device. We can't see them, and neither can anyone else.
• No lock-in.No signup, no subscription, no "export credits." Open a PDF, sign it, download it.

Who writes our guides

Our guides are written and tested by the PDFYay Editorial Team. We test every step in the actual app and cite primary sources (ESIGN, eIDAS, IRS) for any legal point.

Ready to try it? Sign a PDF now.