Annotate PDF documents online - AI tools

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

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$

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

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

• Freemium

iLovePDF is a comprehensive online platform offering a full suite of PDF editing, conversion, and management tools designed to streamline document workflows for individuals and businesses.

• Freemium
• From 9$

Hylinker is a browser extension that enables users to annotate webpages and PDFs, connecting notes, images, and videos with bi-directional links. It supports integration with popular note apps, offering both offline-first capabilities and real-time synchronization across devices.

• Freemium
• From 2$

Smallpdf offers a suite of 21 tools to convert, compress, edit, and sign PDFs for free. Simplify your document management with a user-friendly interface and secure processing.

• Free Trial

PDF PDF offers a comprehensive suite of free online tools for all your PDF needs, including conversion, merging, splitting, compression, and more.

• Free

Sejda is a comprehensive PDF editing and management platform offering over 30 browser-based tools for tasks like editing, merging, splitting, converting, compressing, and securing PDF documents.

• Freemium
• From 8$

ILovePDF3 provides a comprehensive set of free online tools for editing, converting, and managing PDF documents, images, and other file formats, catering to both individuals and businesses seeking simple digital document solutions.

• Free

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$

DeepPDF is an AI-powered tool for interacting with PDF documents. It allows users to chat with PDFs, summarize content, translate, analyze images and formulas, and convert files, simplifying research and document management.

• Freemium

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

Online2PDF offers a robust suite of PDF conversion, editing, and management features for free, supporting multiple file formats and advanced customization options.

• Free

API2PDF provides a powerful REST API enabling developers to generate, convert, and manipulate PDFs and documents at scale using leading rendering engines and serverless infrastructure.

• Usage Based
• From 1$

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$

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

YellowPDF is an AI-powered online tool that offers a comprehensive suite of PDF management features including merging, splitting, compressing, converting, editing, and securing documents.

• Other

DocHub simplifies document workflows with online PDF editing, e-signatures, and form creation. It offers seamless integration with Google Workspace and robust security features.

• Freemium

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$

PDFConvo allows users to interact with their PDF documents through chat, enabling quick summarization and understanding of the content.

• Freemium

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$

TalkingPDF is an AI-powered PDF interaction tool that allows users to chat with their PDF documents, making information retrieval quick and intuitive.

• Freemium
• From 8$

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$

PDFinity is a comprehensive online PDF management platform offering tools to edit, convert, compress, split, merge, and sign PDF documents without requiring software downloads.

• Freemium

DocMadeEasy offers a comprehensive suite of secure, AI-powered PDF management tools for editing, signing, converting, and optimizing documents online.

• Freemium
• From 7$

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

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$

Bookaroozie enhances reading by allowing users to interact with PDFs, EPUBs, DOCX, and other formats using AI. Select text for explanations, chat with LLMs, and save insights for deeper understanding.

• Freemium

Side Reader is a tool designed for efficient PDF interaction, offering features like split-screen viewing, zoom, text copying, and the ability to capture and ask questions about document content.

• Freemium