The tool to compare PDF files

KIWI PDF Comparer

Compare PDF files to detect changes in text and images. It can differenciate movementes, insertions and deletions, select regions to compare... and much more!

Kiwi PDF Comparer - Business - Requires Windows, Mac OSx, Linux.
***** Rating ( ratings)
Free version available.
PDF files comparison

The best text and images comparison...

Kiwi is a powerful tool to compare text and images in two documents and show the differences.

...without periodic payments!

Get the PRO version for only a small payment, it has the best value for money on the market!

Major features

No other tool to compare PDF has all these options for the same price!

Types of differences

2 Comparison Modes

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

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


Choose what to compare within documents

Select regions to compare from the two PDF documents and leave out headers, footers and side margins.

Select what pages to compare from each document.


Distinguish different types of changes

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


Easy Visualization and Navigation

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

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

How to compare two PDFs

How to compare two PDFs

Kiwi is a powerful tool to compare PDF that uses advanced algorithms, many of them created especifically for this, to detect and show differences between two PDFs. It´s designed to review different versions of PDF files easily, quickly and accurately (what is colloquially called performing a PDF diff):

1. Load files:
Load PDF documents and select pages to compare and regions to exclude from comparison. Change comparison mode (text compare or image) and other configurations if you want to.

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

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

You can read further information about performing a PDF diff here:

How to compare PDF files

Many options for the best result!

Content or Appearance

Choose between two modes: text compare including images if you seek content or compare 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.

Find usual questions about Kiwi in the FAQs section:


Compare files of type Word, Excel, Autocad...

To compare files of another type like Word, Excel, Autocad... print them to PDF with a software that handles these file types and then you can compare the documents with Kiwi!

Document types

It works in Windows, Mac OS and Linux

Kiwi works in different operative systems thanks to the use of Java (if it isn't already installed in your computer, get it from here).

System requirements:
- Java 7 (1.7) or later installed.
- Windows, Linux or Mac OS operative system.
- 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.

Operative Systems

Download Kiwi software

Choose the best option for you:


PDF Comparer


  • With some limitations:

  • - Up to 100 pages comparison
  • - Includes attribution texts on saved results

Kiwi PRO

PDF Comparer

19 $*

  • Professional capabilities for just one payment.
    There are no periodic payments!:

  • - Up to 1,000 pages comparison**
  • - Print results in PDF without attribution texts

(*) 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.

(**) In many PCs comparing more than 300 pages could take a long time.

Kiwi PRO (PDF Comparer) is sold by Gumroad, a major platform to sell digital contents.
It´s possible to pay either with Paypal or credit card using secure payment methods.

Every license is perpetual (no subsequent periodic payments will be requested) and 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 PDF files

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

Image comparison

Watch Video

See how to use the software. It´s very easy!.


Do you have any any aditional question about Kiwi?.