Read PDFs with LLMs — @mention threads on passages, or generate interactive chapter summaries

Cross‑platform PDF tooling built on the open‑source PDFium engine

Agentic, build-validated C# examples for Aspose.PDF for .NET covering PDF creation, conversion, editing, annotations, forms, digital signatures, and text extraction.

This repository demonstrates how to add or remove stamp annotations in PDF documents using C# and the Syncfusion .NET PDF Library. Learn to apply standard approval stamps,embed custom image stamps like logos/signatures,and remove existing stamps programmatically-ideal for automating document workflows,branding, status tracking in .NET applications.

Free, privacy-first web tool to extract PDF highlights, notes, and comments into Obsidian, Notion, Markdown, and CSV. 100% offline & local. Live at pdfannotations.com.

Zero-dependency Rust→WASM PDF engine + TypeScript SDK — read, edit, render, OCR, sign, redact and convert PDFs (↔ Office/HTML/RTF/PDF-A) with no third-party libraries.

Adobe Acrobat Reader Free | 免费PDF阅读与编辑工具，内置高效文本高亮、表单填写和注释模版。专为快速本地部署而设计，提供稳定的文档浏览、格式转换辅助与多端数据同步功能。

PDF Compare Viewer V2 - Side-by-side PDF comparison with native annotation support, sync/zoom, and hand pan/zoom

Extract reviewer comments hidden behind underlines/highlights in a PDF. One command turns a 'reviewed' PDF into a clean checklist. PyMuPDF-powered, Claude Code skill included.

Kotlin-native PDF library for Android. Create, edit, merge, split, annotate, encrypt PDFs. Affordable iText7 alternative — free for personal use, $99/year for commercial.

A lightweight client-side PDF viewer and annotation tool written using Codex

Zotero 9 plugin for reviewable vocabulary candidates from PDF underlines

A library that extracts comments from PDFs into structured document ready to be fed into an AI agent