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PDF.js Express Free Viewerplay_arrow

Professional PDF.js Viewing - Free

PDF.js Express Plusplay_arrow

Professional PDF.js Viewing & Annotations - Try for free

PDF.js vs PDF.js Express

This page compares two PDF.js viewers to help you choose the best way to embed a PDF viewer in your website or application.

VS

PDF.js

PDF.js is an open source PDF viewer for displaying PDFs in a browser using JavaScript.

VS

PDF.js Express is a PDF.js viewer with out-of-the-box annotation, PDF form fill, and signing.

When to use PDF.js:

  • Users need to view PDFs
  • UI/UX does not need to be a competitive differentiator
  • Users won’t need to zoom in to see details
  • The text search tool can miss some relevant text within a PDF

When to use PDF.js express:

  • Users need to view, annotate, form-fill, or sign PDFs
  • Your app needs a modern, highly customizable UI/UX
  • Users expect sharp graphics when zoomed in
  • The text search tool needs to find relevant text within a PDF

Not sure if PDF.js is right for you?

Compare out-of-the-box features

Open all
PDF.jsPDF.js ExpressPDF.js Express
addViewing
Max zoom factor (image depth / quality)

1,000%

+100,000%

+100,000%

Crisp graphics at high zoomcheckcheck
addAnnotations
Collaborate in real-timecheck
Freehand, free text, shape, comment annotationscheck
Stamp document with text, imagescheck
Watermark to prevent distributioncheck
User roles and permissions (control access to each annotation)check
Annotation events to trigger custom functionalitycheck
Create custom annotationscheck
Cloudy annotationscheck
Measurement tools (distance, perimeter, area)check
addModern UI
Modern UI written in ReactJScheckcheck
Fully responsivecheckcheck
Customizablecheckcheckcheck
Dark themecheckcheckcheck
Hide/Show Download/Print and other toolscheckcheckcheck
Open source UI (source code downloadable)checkcheckcheck
addPDF Forms
User form fillingcheck
Merging form datacheck
Programmatically prepopulate formscheck
Extract forms data and save values separatelycheck
JavaScript field validation/formattingcheck
Customize form appearancecheck
Print entered field valuescheck
Form actions/interaction between elementscheck
addSignatures
Sign by using hand-drawn annotationcheck
Save signatures for signing multiple pagescheck
addSearch
addSupport
Rendering engine

PDF.js open-source community

PDF.js open-source community

PDF.js open-source community

PDF Viewer UI

PDF.js open-source community

1-on-1 support via forum

1-on-1 support via forum

addDocumentation
Guidescheckcheck
Samplescheckcheck
Try it for free