pdf-annotator

Free and open-source PDF editor for Windows with a built-in PDF 2.0 engine. View, annotate, OCR, merge, split, crop, rotate, compare, edit text, draw, sign, fill forms, print, flatten, and open password-protected PDFs without a subscription.

A plugin for reading and annotating PDFs and EPUBs in obsidian.

A mind map, outline for obsidian,It support mobile and desktop

An annotation extension based on the PDF.js viewer. Supporting the editing of existing PDF file annotations, posting comments, replying, submitting annotation data, and loading for further editing. 一个基于 PDF.js 阅读器的批注扩展，支持对现有 PDF 文件批注的编辑、发布评论、回复、提交批注数据以及加载后续编辑功能。

THE reference manager with features including PDF reading/annotating, Markdown/Excalidraw note-taking, project/note linking, and more...

THE reference manager with features including PDF reading/annotating, Markdown/Excalidraw note-taking, project/note linking, and more...

📄 Set of modern React components for PDF highlighting

React PDF viewer & annotator SDK — highlight, markup, ink, shape, stamp and signature annotations with comments, review workflow and collaborative permissions. Export to PDF/Excel. React PDF 查看与批注 SDK， 支持高亮、笔迹、图形、印章、签名、评论审阅与协作权限。

PDF Manipulator: A versatile toolkit for editing, annotating, merging, splitting, compressing, and converting PDFs. Seamlessly add pages, extract images, and preview files with intuitive drag-and-drop. Fully responsive across devices for effortless document management.

Vue3 PDF viewer & annotator SDK — highlight, markup, ink, shape, stamp and signature annotations with comments, review workflow and collaborative permissions. Export to PDF/Excel. Vue3 PDF 查看与批注 SDK， 支持高亮、笔迹、图形、印章、签名、评论审阅与协作权限。

集成 Git 的多模态文件编辑管理器与自由工作区。原生支持 Markdown、Draw.io、GeoGebra、思维导图、KDBX 密码库（含 2FA & SSH 直连）与 PDF 专业批注。| Multimodal Markdown editor & Git workspace with Draw.io, GeoGebra, MindMap, KDBX & PDF annotation.

View and edit PDF documents with customisable VIM keyboard shortcuts

pdf annotator not installing on windows 11 — practical Windows notes: install steps, typical errors, and where to get PDF Annotator working on PC.

Question-answering system for Zotero libraries with a 3-stage RAG pipeline: FAISS retrieval → CrossEncoder reranking → extractive QA. Features GROBID parsing, question expansion, multi-color PDF highlighting, and Streamlit interface. Ask questions, get answers with sources.

Annotation layer for pdf.js (forked from instructure's pdf-annotate.js)

PDF format annotation and labeling support for Label Studio

This is the public repository of the Starlight PDF project. It contains docs, issues, assets and the releases.

本地优先的结构化 Markdown 笔记与知识工作台。原生集成 Git 版本控制、Draw.io 绘图、GeoGebra 建模、思维导图、KDBX 密码库（含 2FA & SSH 直连）及 PDF 专业批注。| Local-first structured Markdown notes & knowledge base with Git, Draw.io, GeoGebra, MindMap, KDBX & PDF.

Local-first notebook for macOS and the browser — import a PDF and write on top of it with pen, highlighter, text, and shapes.

Small Project of a PDF annotation tool written in C++