We lived the PDF vendor trap. Then we built the escape.

Years of confusing pricing and annual ransoms taught us the game. Paperview PDF plays different. Buy once. Build forever.

Join the Waitlist

Live Demo

Loading viewer...

Request Early Access

We're onboarding builders in small batches to ensure quality and gather feedback. Drop your email and we'll reach out when a slot opens up.

New

Document compare, built in

Show your users exactly what changed between two versions of a PDF. Not only the words.

Text and pixels

A word-level diff finds edits to the text. A pixel comparison finds everything else: a moved logo, a swapped image, text converted to outlines, a scanned page.

Four views

Side by side, overlay, blink and heatmap, with synchronized scrolling and zoom.

Pages line up themselves

Offset, rotation and scale are estimated per page, with a confidence figure, so a re-export on a larger sheet still compares cleanly.

Changes, not noise

Differing letters gather into words, lines and blocks. Ignore zones set aside the parts that always change, without hiding them.

The same result in Node

Run the comparison from a CLI or a library, on a server or in CI. Same engine, same settings, same result as the browser.

Your regions on the page

Draw your own labelled, severity-coloured regions and pins from your app, and step through them with the viewer’s navigation.

const compare = registry
  .getPlugin('compare')
  .provides()

compare.startCompare({
  oldDocumentId: 'old',
  newDocumentId: 'new',
  pixel: 'artwork',
})

compare.setView('overlay')

Try the compare demo