KnotPlot 1.02 Available Now!

Hypnagogic Software is pleased to announce that KnotPlot 1.0, the World's most elaborate knotting software is now available for the low price of only $27.18 (US dollars). Buy now and enjoy the following advantages:

If you wish to evaluate the software before purchasing it, just download it using one of the links below. The evaluation version of KnotPlot is completely free, but many features have been disabled. You can always upgrade your KnotPlot version by simply returning to this web page and purchasing a key later. The free evaluation version becomes the full version when the key is installed.

KnotPlot 1.02 is available for macOS, Linux and Windows 10. Click on the button below to purchase KnotPlot using PayPal (you can use a credit card). All transactions are secure.

You don't need a PayPal account, most credit cards are accepted. After you purchase KnotPlot, you will receive an email from with your key. Just install the software and your key, and you will be set to start plotting knots!

To see what KnotPlot can do, check out the KnotPlot Site where all images (except a few) were generated with KnotPlot.

Rob Scharein (
Hypnagogic Software
7 April 2022

Installing KnotPlot

Installing KnotPlot is easy, just click on one of the links below to install the software. When you first install KnotPlot, it will be the free evaluation version (which has features disabled). If you wish to have the full version of KnotPlot, purchase a key using the Buy now button above. Fairly soon after you make the purchase, you will receive an email from with a key and instructions on how to install it. After the key is installed, you will be up and running KnotPlot with all features enabled.

NEW!! KnotPlot has been extended with an embedded scripting language (Lua) Lua is available on the macOS, Windows and Linux versions, and greatly simplifies the process of KnotPlot scripting. See the demos on the bottom of DemoA for some examples.

KnotPlot download

Here are the downloads for KnotPlot. KnotPlot needs two components, the executable, which is the program itself, and the KnotPlot distribution, which is the approximately 5,959 files that KnotPlot just can't live without. If you're installing on a Windows or macOS machine, you only need one file, which contains both the executuable and the distibution. On Linux platforms, you need to download the executable and the distribution separately. NOTE: Some browsers may strip the file name extensions (such as .gz) without actually gunzipping the file. If you're downloading one of the files below, make sure that your browser saves it with the correct file name.

Platform Executable Distribution
  Download File size (kilobytes) Last updated (UTC) Download File size (kilobytes) Last updated (UTC)
Microsoft Windows 10 (and probably 11, but I haven't tested it yet) InstallKnotPlot.exe

MD5 file hash: fe242998b700c7b2c0da57bf0e1cd937
12838 1h16m 31May22 included with executable
(iMac, Mac Mini, Mac Pro, MacBook Pro, MacBook  etc.)
This version should work on 10.12 (Sierra), 10.13 (High Sierra), 10.14 (Mojave), 10.15 (Catalina), 11 (Big Sur) or 12 (Monterey)

MD5 file hash: f1cdf50391fdd07040aac01582d6f175
17641 17h14m 1Jun22 included with executable
Linux 64-bit
compiled on Debian GLU Linux 10.10
ARM aarch64

MD5 file hash: b876a1658438960ef32559a443cf79f4
1486 23h43m 4Jun22 kpdist.tar.gz

MD5 file hash: 486c5232f4d4544515c4a69635768df6
27499 23h00m 3Jun22
Linux 64-bit
compiled on Fedora 34
ARM aarch64

MD5 file hash: 90fa9773ca6e8b5d3f49121793a1ca25
1342 23h04m 3Jun22 kpdist.tar.gz

MD5 file hash: 486c5232f4d4544515c4a69635768df6
27499 23h00m 3Jun22
Linux 64-bit
compiled on Red Hat Enterprise Linux 8

MD5 file hash: e2fce4d02c7b593583489ac2b69b62da
1359 17h33m 8Jun22 kpdist.tar.gz

MD5 file hash: 486c5232f4d4544515c4a69635768df6
27499 23h00m 3Jun22
Linux 64-bit
compiled on Ubuntu 20.04

MD5 file hash: 9135b8ba0366f2336a8ce1e7af900516
1552 22h15m 1Jun22 kpdist.tar.gz

MD5 file hash: 486c5232f4d4544515c4a69635768df6
27499 23h00m 3Jun22

KnotPlot installation and distribution files are copyright © 2022 by Rob Scharein. All rights reserved. See below for terms of use.

Note: In the above, the term kilobyte means exactly 1,000 bytes (and not 1,024 bytes). For more information, see the page on SI prefixes at the National Institute of Standards and Technology.

Installation Instructions

Information on installation, including helpful YouTube videos, is available for the following platforms:

Installing the Key

To access all the features of KnotPlot, you will need to install a key. This key will be emailed to the address you supplied when you purchased KnotPlot using PayPal. This will happen fairly soon after purchase, usually within a few hours. Instructions on what to do with the key will also be provided.

Notes for Mac Users

The macOS version has a few oddities that deserve mentioning. In general, you should ignore all the standard Mac menus, use the KnotPlot menus instead (right-click or control-click on the KnotPlot Control Panel).

Secondly, I recommend reading the Read Me.pdf file that comes in the distribution. These utilities help in getting KnotPlot to save files to a specific folder/directory.

KnotPlot Manual

A PDF version of the manual is available: KnotPlot Manual

For making Encapsulated PostScript (EPS) figures for including into publications, check out the PSexamples manual as well as an extensive web page of PostScript and PDF examples, together with the KnotPlot commands used to create them.

A quick startup guide to using KnotPlot is also available (handout.pdf), as are five small tutorials (ex1.pdf, ex2.pdf, ex3.pdf, ex4.pdf, ex5.pdf).

The DemoA and DemoB control panels are also a good place to begin exploring what KnotPlot can do. Check out the Rough Guide to the KnotPlot Demos for some explanation on what is what.

More documentation is available using the help buttons at the upper right of each of the Control Panel tabs (the help given is specific to each tab).


This section is of interest to those using KnotPlot to study DNA topology. Included in the KnotPlot distribution is the Topological Interactive Construction Engine, or TopoICE, which implements Isabel Darcy's algorithms for solving tangle equations. TopoICE comes in two flavours TopoICE-X and TopoICE-R. The following support files for TopoICE are provided.

TanglePrimer.pdf A primer on rational tangles (preliminary version, 140 kilobytes)
TopoICE-Xmanual.pdf TopoICE-X manual (247 kilobytes)       TopoICE-Xexamples.pdf TopoICE-X examples (882 kilobytes)
TopoICE-Rmanual.pdf TopoICE-R manual (175 kilobytes)       TopoICE-Rexamples.pdf TopoICE-R examples (343 kilobytes)


I would like to thank the Pacific Institute for the Mathematical Sciences, the Centre for Experimental and Constructive Mathematics, and the Department of Computer Science at UBC for previously hosting the KnotPlot web pages.


KnotPlot and the KnotPlot installation and distribution files are copyrighted by Rob Scharein. Unauthorized hosting of any of the installation or distribution files, on any web server for any purpose, is expressly forbidden.

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