pdf-annotations

DartPDF is a free, local PDF editor for Android, iPhone, iPad, Mac, Windows, Linux and web. Annotate, fill forms, sign and redact without an account. The repository also contains a pure-Dart PDF engine and Flutter viewer/editor SDK.

🚀 React Native PDF Enhanced – JSI‑Powered Performance The only React Native PDF viewer built with JSI. Render, zoom, search, and compress up to 80x faster—plus analytics, export (PNG/JPEG), and constant 2MB memory usage.

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

Vue 3 PDF viewer with draggable and resizable overlay elements for signatures, forms, annotations and document workflows.

Two way sync for Zotero and reMarkable with highlights, annotations, notes and handwritten notes.

Sync a personal Zotero library and PDF annotations to Obsidian Markdown.

AiPDF Editor — a local-first, Electron-based PDF viewer & editor for Windows: view, comment, edit text & objects, organize pages, fill forms, encrypt, redact & sanitize, OCR scans offline, read aloud, check forensics & accessibility — plus an optional bring-your-own-key AI assistant with verified AI editing.

为DSH中的Agentero PDF阅读器增加完整文字批注、搜索、按页筛选与跳转。

Aspose.PDF for .NET — Agentic, AI-generated C# examples. 2,600+ verified, compile-tested snippets covering conversion, forms, signatures, annotations, and more.

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.

Free, local-first web highlighter for Chrome, Edge, Brave and Firefox. Notes, PDFs, voice, Markdown and Notion exports.

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

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

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.

PDFium Gate – Obsidian plugin for PDF reading, annotations, document metadata, registers, email import, and source archiving.

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.

LeafSide: a fast, native PDF reader for Windows with smooth scrolling, highlights and notes, on ARM64 and x64 (WinUI 3 + PDFium)

Single-page PDF horror demos: AcroForm animation and print-only Stamp annotations, with reconstruction code and validation.

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。