Best PDF Annotators for JavaScript

Apryse (formerly PDFTron) makes documents work harder for you. We give organizations the power to handle the full document lifecycle — from secure server-side processing to smooth web-based collaboration — without relying on third-party services. With Apryse, you can: Integrate advanced document capabilities like viewing, editing, annotation, and e-signature directly into your applications. Deploy on your own infrastructure for maximum control, privacy, and compliance. Scale effortlessly with technology built for high-volume, enterprise-grade workflows. Deliver modern web experiences that are fast, accessible, and reliable across browsers and devices. Trusted worldwide, Apryse helps enterprises, developers, and small businesses simplify workflows, cut costs, and deliver better digital document experiences.

The Nutrient SDK integrates PDF annotation and markup directly within applications, allowing users to annotate documents on-site rather than exporting them to an external review platform. This tool is utilized by developers, product managers, and document review teams for various tasks such as contract and compliance assessments, board pack reviews, engineering markups, and approval processes. It supports over 15 industry-standard annotation types, including highlights, underlines, strikethroughs, ink drawings, shapes, stamps, sticky notes, and free text, ensuring consistent rendering across web, mobile, and desktop environments. Users can add threaded comments linked to annotations, capturing the author and timestamp, with options to resolve or reopen discussions. Additionally, permission settings determine who can view, comment, or modify annotations. Teams have the ability to personalize colors, toolbars, and stamps, manage annotations through an API, and export in XFDF format for compatibility with other PDF tools or Instant JSON for seamless synchronization across users and devices.

PDFKit is a versatile library designed for generating PDF documents in both Node and browser environments, facilitating the creation of intricate, multi-page, printable materials with ease. Its API promotes chainability and offers a combination of low-level functions alongside higher-level abstractions, making it user-friendly. With PDFKit, producing elaborate documents can often be accomplished through just a handful of function calls. It also encompasses access privileges, which include options for printing, copying, modifying, annotating, form filling, ensuring content accessibility, and document assembly. Accessibility features are well-supported, featuring marked content, a logical structure, Tagged PDF, and compliance with PDF/UA standards. Additionally, PDFKit is compatible with JPEG and PNG images, allowing for the use of indexed PNGs and those with transparency. Alongside PDFKit, it's crucial to have a destination to stream the generated output. For projects utilizing PDFKit through Browserify, it's important to install the brfs module via npm, which is essential for loading built-in font data into the library. This combination of features makes PDFKit a powerful tool for anyone looking to create detailed and professional PDF documents efficiently.