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

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

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$

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

Pdfcrowd provides a reliable online service and API for converting HTML, PDFs, and images between formats, tailored for businesses and developers.

• Paid
• From 11$

PDF.io delivers a suite of easy-to-use online PDF tools for splitting, merging, converting, and protecting PDF documents, with both free and premium access options. Unlock full capabilities to manage and process your PDFs efficiently and securely online.

• Freemium
• From 6$

PDF Editify offers a user-friendly platform for fast and easy PDF editing, allowing users to fill, edit, sign, redact, OCR, and create PDF forms with a focus on simplicity and security.

• Freemium