Free open-source web software for signing PDF (alone or with others) and also organize pages, edit medata and compress pdf

✍️ Nextcloud app to sign PDF documents

A tool to sign PDF files. With Linux support.

PDFSigner is a multipurpose PDF signer and verifier application for Advanced Electronic Signature (AES) and Qualified Electronic Signature (QES)

📑 HTML5 Javascript Online Offline Browser Editor 📜 for PDF files for insert sign, images, photos, comments or annotations

A vue PDF editor component

Digitally sign PDF document from your phone using handwritten signature or image.

🔏 Sign PDFs with the portuguese citizen card (aka "cartão de cidadão")

Windows executable for sign a PDF with a certificate and a hanwritten signature

This repository contains examples to digitally sign and validate the PDF document using the Syncfusion PDF Library.

Firma massiva in formato PADES usando una smartcard

A quick start Blazor project that shows how to create a PDF digital signature, customize it, add a timestamp, and add multiple signatures to a PDF document using Syncfusion PDF Library.

Google KSM Signer implementation for pyHanko

Trexo PDF Signer is a professional-grade, open-source application designed for creating legally binding digital signatures on PDF documents. Built with enterprise security standards in mind, it provides seamless integration with hardware security modules (HSM), software certificates, and native platform keystores.

This is a Node.js API for signing PDF documents using certificates

一个强大的OFD/PDF签章工具，支持格式转换、文档加密、电子签名、数字印章和完整性保护。A powerful OFD/PDF signing tool that supports format conversion, document encryption,electronic signature, digital seal, and integrity protection.

🖊️ Sign PDFs easily with pdf-sign, a Rust utility that supports OpenPGP and Sigstore for secure, keyless document signing and verification.