Products · Annotation & Markup

Mark up documents the way people review on paper

More than twenty tools for highlighting, drawing and commenting, with appearances that look the same in every PDF reader.

Get startedSee the code
service-agreement.pdf
ViewAnnotateShapesInsertEdit
APPROVED

20+

markup tools

10

line-ending styles

JSON

import and export

PDF

standard annotations with appearances

Features

What Annotation & Markup does

01

Text markup

  • Highlight, underline, strike-out and squiggly, snapped to the letters
  • Insert text at a point, or replace a run of words
  • Free-hand highlighter and pen
  • Handles to grow or shrink a mark across lines
service-agreement.pdf
ViewAnnotateShapesInsert
APPROVED
02

Shapes and drawing

  • Rectangle, ellipse, line and arrow (10 line endings)
  • Polygon, polyline, cloud and arc
  • Stroke, fill, opacity, width and dash styles
  • Shift to keep proportions while resizing
03

Comments

  • Sticky notes and comments on any mark
  • Replies with author and time
  • A comments panel to read and edit every thread
  • Hover tips show what each mark says
04

Standards-based output

  • Real PDF annotations with generated appearance streams
  • Import and export as JSON for your own storage
  • Flatten into the page when the review is done
  • Saved into .docx and .xlsx as Word and Excel content

At a glance

Everything included

No add-ons and no tiers: every item here ships in the same package, free under MIT.

  • Highlight
  • Underline
  • Strike-out
  • Squiggly
  • Pen
  • Highlighter
  • Text box
  • Insert text
  • Replace text
  • Sticky note
  • Rectangle
  • Ellipse
  • Line
  • Arrow
  • Polygon
  • Polyline
  • Cloud
  • Arc
  • Stamp
  • Signature
  • Image
  • Eraser

For developers

The same few lines in JavaScript and .NET

One engine behind both packages, so behaviour and output match on every platform.

Getting started API reference
app.js
const doc = viewer.getDocument();const hit = doc.search('Termination')[0];doc.addAnnotation(hit.page, {  type: 'Highlight', quadPoints: hit.quadPoints,  contents: 'Check the notice period', author: 'Legal',});

Used in these workflows

Legal & contractsReview, redline and sign agreementsLife sciences & pharmaReview and approve regulated documentsConstruction & engineeringMark up drawings and specsEducationGrade, comment and hand back workSoftware platformsAdd documents to your own product

Works well with

Fill & Sign

Signatures, stamps, dates and checks

Learn more

Document Viewer

PDF, Word and Excel in one fast viewer

Learn more

Word Editor

Edit .docx with real page layout

Learn more

Add Annotation & Markup to your app

Free under the MIT licence, for the browser, Node.js and .NET.

Get startedRead the docs