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

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

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.

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.

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.

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

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