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PDF Viewer SDK & Library for 30+ File Formats

Embed the best-in-class document viewing experience that works consistently across web, mobile, and desktop platforms . Unlimited UI flexibility wrapped around our fast & battle-tested rendering engine, page streaming, reflow, night mode, and more — all designed for the best possible user experience.


Text Selection


Page Display Mode

Night Mode


Accurate & Reliable Rendering

PDF & Office specifications are very complex. Avoid costly surprises with the most compliant rendering engine built from the ground up and perfected at PDFTron over the last 20 years

Fastest Viewer

Enjoy optimized silky-smooth viewing across web, mobile, and desktop platforms . Let users view remote pages instantly, without slowly downloading the entire file.

Designed for Complex Files

Handle any file that your users may bring along — no matter how large or complex. Discover why CAD/CAM/AEC has standardized on PDFTron SDK.

Complete Source Code Customization

Use slick, drop-in widgets & annotation tools that come with full source code. Match your look & feel or build a unique product. No limits!

The Most Scalable Viewer

Cut bandwidth costs with on-demand page streaming. Reduce or eliminate DevOps costs with scalable serverless viewing technology.

Office Document Viewer

Add support for viewing Word, Excel, and PowerPoint documents to any browser or app -- no conversion or server dependencies required.
Learn more

Powered by PDFTron

XODO, PDFTron's showcase app, is the top-rated PDF app in the Google Play Store. Its source code is included in our Android SDK, helping you build amazing apps faster.

4.8 out of 5

20M+ installs

Powered by the PDFTron SDK

Easy to Integrate

Code samples, familiar package managers, and a Docker image make it easy to get up and running.

Consistent and Predictable

Our core document engine has been perfected by 20 years of knowledge, innovation, and real-world testing.

Fully Customizable

An open source UI gives you complete freedom to match your look & feel, and optimize the user experience.

Truly Cross-Platform

A single API with consistent function calls across platforms means a shorter learning curve and easier maintenance.

Try our SDK for free today

UPCOMING WEBINAR: "How to build a scalable document generation solution" Nov 18th @ 11am PDT