3-Heights™ PDF Web Viewer - advanced PDF visualisation in JavaScript

Developer component – The 3-Heights™ PDF Web Viewer API is a compact, high-performance, high-quality javascript PDF viewer. It offers a multitude of navigational and display options for displaying documents. This viewer is mainly characterized by its increased performance and its uniform and simple interface.


View your PDF documents in high quality in browsers and on mobile devices


Seamless and efficient integration in your corporate browser and web applications


Apply pictures, text or more to your PDF documents

PDF Web Viewer - Advanced PDF visualisation & annotation feature in JavaScript

Web Viewer - Functions

  • Navigate manually (user action) or programmatically through a document
  • Select between different fit modes: actual size, fit to width, fit to height
  • Rotate and display the page
  • Show thumbnails and use them for navigation
  • Show outlines (Bookmarks)
  • Change language of the GUI (currently English and German supported)
  • Create, edit and delete annotations
    • Text annotations
    • Ink annotations (free hand drawings)
    • Stamp annotations (Draft, Approved, etc.)
    • Freetext annotations
    • Highlight annotations (highlight, strike out, underline, squiggly)
  • Touch handling for mobile devices
  • Enter password to decrypt PDF documents
  • Read document from file or memory or from a blob
  • Supports the Forms Data Format (FDF) file format
3-Heights™ PDF Web Viewer - annotations in browser


  • ISO 32000-1 (PDF 1.7)
  • ISO 32000-2 (PDF 2.0)
  • ISO 19005-1 (PDF/A-1)
  • ISO 19005-2 (PDF/A-2)
  • ISO 19005-3 (PDF/A-3)

Supported formats

Input formats

  • PDF 1.0 to 1.7
  • PDF 2.0
  • PDF/A-1, PDF/A-2, PDF/A-3
  • FDF (Form Data Format)

Output formats

  • PDF 1.0 to 1.7
  • PDF 2.0
  • PDF/A-1, PDF/A-2, PDF/A-3
  • FDF (Form Data Format)
Magnifying lens for our PDF manuals and PDF sample code



Areas of use - mobile-friendly viewer from desktop to mobile devices

Document viewing via browser

Get industry leading rendering quality for high fidelity document presentation. Usable in all corporate areas and in every modern browser. Runs indepently and efficient on every device with corresponding browser.


While viewing and reading the PDF documents in the browser the user is able to add and share notes. Apply pictures, text or more in the PDF documents.

PDF Expert blog - the miracle PDF viewer - more than a display tool

The versatility of a PDF viewer

Almost every user knows: a PDF viewer is not just a display tool for a well known document format. It provides many more functions, runs on many platforms, offers interfaces in many technologies and serves as an important component of many applications. When you look closer it is a true miracle.

Special - PDF rendering

The PDF graphics model is unique and differs significantly from the models of most of the publically available graphics engines. What are the requirements of a high-quality PDF rendering engine and is there a relation to PDF 2.0?

Read more about the essential part of a good PDF rendering engine