PDF highlighting and annotation software - AI tools

Highlights is an AI-powered PDF reader and research tool that transforms PDF annotations into organized notes with features like multilingual OCR, citation lookup, and smart export capabilities.

• Freemium
• From 5$

Annotations is a Mac application that simplifies document annotation with highlights, keywords, and notes while maintaining document clarity, designed for researchers, students, and data analysts.

• Free

Macro is an AI-powered PDF reader designed to transform academic, legal, and finance documents into interactive and intelligent resources, enhancing understanding for professionals.

• Contact for Pricing

Adolix offers a suite of free tools including PDF split/merge/conversion, content highlighting, news feed sanitization, and high-contrast browsing to enhance productivity and eye comfort.

• Free

Afirstsoft PDF is an AI-powered PDF editor for creating, editing, converting, annotating, and organizing PDF documents across multiple platforms, featuring AI summarization and chat.

• Freemium

PDF Reader Pro is an all-in-one PDF solution for viewing, editing, converting, annotating, and form-filling across Mac, Windows, iOS, and Android. It integrates AI features like translation, summarization, and rewriting to enhance document workflows.

• Pay Once

I, Librarian is an online reference manager and PDF organizer that centralizes document storage, enables full-text search, and facilitates private group collaboration for students and research professionals.

• Other

Advanced PDF Editor is an all-in-one PDF editing solution for Mac, offering over 40 features to edit, merge, convert, sign, and secure PDF files with ease and efficiency.

• Freemium
• From 4$

PalyPDF is an AI-powered PDF management tool that enables users to chat with, search, summarize, and organize PDFs in over 85 languages.

• Freemium
• From 5$

GoodAnnotations provides AI-powered tools for drawing, editing, and annotating PDFs and screenshots to boost productivity and collaboration in digital workflows.

• Other

PDF Bob is a free online PDF editor that allows users to edit, annotate, create, and manage PDF documents without watermarks or ads.

• Free

ZetPDF is a high-performance .NET SDK that enables developers to create, edit, convert, protect, and print PDF documents without requiring Adobe Acrobat, featuring a 100% managed C# codebase with its own rendering engine.

• Pay Once

Xodo is an all-in-one document solution offering powerful tools to manage, edit, convert, and sign PDFs, Office files, and images across web, desktop, and mobile platforms.

• Paid
• From 10$

aiPDF revolutionizes document interaction through AI-powered summarization, data extraction, and conversational analysis. This cloud-based solution offers secure processing of various file types with instant citation-backed responses.

• Freemium
• From 9$

ComPDFKit provides comprehensive PDF SDKs for developers, enabling integration of PDF viewing, annotation, editing, conversion, and AI-driven document processing functionalities into applications across multiple platforms.

• Free Trial
• From 67$

SwifDoo PDF is an AI-powered, all-in-one PDF software providing tools for viewing, creating, editing, converting, merging, compressing, and managing PDF documents efficiently. Its AI capabilities include summarizing, translating, explaining, proofreading, and rewriting content within PDFs.

• Freemium
• From 5$

NoteButler automatically adds AI summaries to PDFs, websites, YouTube videos, and podcasts in Notion, making them searchable. It performs OCR on PDFs to extract text and create concise summaries.

• Paid
• From 2$

Win PDF Editor is a Windows-based PDF editing software that enables users to modify PDF documents by adding text, inserting images, drawing shapes, removing content, deleting pages, and redacting confidential information. It also includes a PDF converter for transforming documents into various editable formats.

• Other

PDF Buddy is a secure, web-based PDF editor that allows users to edit, fill, sign, and manage PDF documents directly in their browser. The tool offers convenience, safety, and an eco-friendly solution for managing PDFs without any software installation.

• Freemium
• From 8$

UPDF is an AI-powered PDF editor available across multiple platforms (Windows, Mac, iOS, Android). It offers a comprehensive suite of PDF tools and AI features.

• Freemium

Collabwriting streamlines online research by enabling users to highlight, save, share, and collaborate on web content and PDFs, featuring AI-powered search.

• Freemium

LightPDF is an all-in-one AI-powered platform offering a comprehensive suite of tools for PDF editing, conversion, OCR, and document interaction, accessible across desktop, mobile, and web.

• Freemium

HiPDF is a comprehensive online PDF tool offering editing, conversion, compression, and merging features, enhanced with AI for summarization, translation, and interaction.

• Freemium