PDF Comparer

The definitive software to compare PDF documents:

Detect changes in text and images, differenciate movementes, insertions and deletions, select regions to compare... and much more!

Major features

2 Comparison Modes

Text and images content:
Find matches and differences in texts and images content, no matter which pages they are on.

Pixel to pixel:
Page to page, as if they were images.

Choose what to compare

Select pages to compare and leave out headers, footers and side margins.

Distinguish different types of changes

- Modifications.
- Insertions.
- Deletions.
- Movements.

Easy Visualization and Navigation

See every change in both documents at once, framed for quick review. Go to next change with a click.

Note: Some characteristics can be limited in the free version of the software to compare PDF .

How it works

Kiwi is a powerful software that uses advanced algorithms, many of them created especifically for this, to detect and show differences between two PDF documents. It´s designed to review different versions of documents easily, quickly and accurately:

1. Load documents:
Load PDF documents and select pages to compare and regions to exclude from comparison. Change comparison mode and other configurations if you want to.

2. Show differences:
Kiwi compares them and shows in the documents all the differences detected underlined and with revision marks. You can navigate from one difference to the nex with a single click.

3. Print results:
Print what you see in a PDF document. You can choose what to print, how and in what color: underlines, revision marks, frames...

You can read further information here:

How to compare PDF documents

Many options for the best result!

Content or Appearance

Choose between comparing text and images if you seek content or comparing pixel by pixel if you seek appearance.

Change colors and marks thicknesses

Ideal for consecutive reviews, to resalt over complex backgrounds or to fit an specific format.

Distinguish different kind of changes

Different kind of changes are displayed in different ways:
- Modifications: Content highlighted.
- Insertions and deletions: Box in the empty space.
- Movements: Content underlined

Left line revision mark available too. Decide what to display and print! (1)

Frame changes

Show changes framed and synchronized in both documents to review them very quickly. Numerate them.

Display image changes over old version

Documents can be overlaid and old version is coloured red where different. (2)

Simple is best!

Don´t confuse the text comparison with format changes you aren´t worried about. Kiwi provides all you need for a clean and relevant result!

(1) Content comparison mode.
(2) Pixel to pixel comparison mode.

You can read usual questions about Kiwi in the FAQs section:

Compare other document types: Word, Excel, Autocad...

It´s very easy: Print them to PDF in a software that can handle these file types and then you can compare them in Kiwi!

Minimum System Requirements

Kiwi PDF Comparer works in almost every modern Windows computer with Java installed (if you don't have Java installed in your computer, get it from here).

Minimum System requirements:
- Java 7 (1.7) or later installed.
- Windows operative system (XP, Vista, 7, 10).
- 1 Gigahertz (GHz) dual core equivalent or faster processor.
- 2 Gb RAM memory (or other amount if 640mb are available for Java aplications).
- 1024x768 screen resolution (at least).
- 40 mb Hard disk space or greater.


Choose the best option for you:

Kiwi FREE PDF Comparer


  • With some limitations:

  • - Up to 100 pages comparison
  • - Print results unavailable
  • - Content comparison mode only includes text

Kiwi PRO PDF Comparer


  • Professional capabilities:

  • - Up to 1,000 pages comparison
  • - Print results in PDF
  • - Content comparison mode can include images

(*) Prices do not include VAT
You will be able to know the final price (including the taxes applicable for your country) in the buying process, before payment.

Kiwi PRO PDF Comparer is sold by Gumroad, a major platform to sell digital contents.
You can pay either with Paypal or credit card using secure payment methods.

Every license is for use in an only computer. However, you can acquire an activation key valid for several computers by selecting the quantity in the buying process.

How much does it cost your time revising documents? Buy it and begin to use it right now!

Examples to compare

Download the following PDF documents and compare them to realize how powerful and easy Kiwi is.

Watch Video

See how to use Kiwi PDF Comparer. It´s very easy!.


Do you have any any aditional question about Kiwi PDF Comparer?.