Frequently asked questions
- Do I need an internet connection to work with Kontrast?
No. While Kontrast runs within your web browser, it is not necessary
to be online while you work on visualizations locally.
- Is Kontrast exclusively a visualization tool?
Besides visualization modes, Kontrast contains methods commonly used
for scientific computing, such as the discrete Fourier transform,
methods to integrate differential equations, perform nonlinear fits,
Can I use Kontrast to embed text to accompany my visualizations?
Yes. It is easy to embed one (or more) figures within a HTML
document, complete with mathematical equations, static images,
- How can I share my visualizations?
You can share your figures by uploading them onto a web space. Many
companies and institutions offer their employees and students a
personal website, and there are many free providers.
- Where can I find help or resources?
We provide a documentation with many examples
that are meant to be copied, pasted and modified for your purposes
and you can reach our support.
- Can I embed Kontrast into blog posts?
and custom CSS code. This is typically possible.
- Can I embed Kontrast into online learning platforms?
Yes, the requirements are the same as above: You need to be able
Do I need coding experience to create Kontrast visualizations?
While coding experience helps, it is not difficult to create
visualizations based on a number of examples and the
documentation, including a
step-by-step tutorial we provide.
Should you get stuck, you are also welcome to reach out to
I take data protection very seriously. Does the Kontrast library
connect to any servers or to
the cloud and track my usage?
No. We do not collect any data when you use Kontrast. The Kontrast
library is fully
self-contained, meaning that no other
resources are loaded. We do not track your usage and we do not
collect usage statistics. If you use Kontrast locally (using our
standalone distribution package) or host the Kontrast library on
your (institution's) own server, there are no technical means for us
to detect your usage.
- How many licenses do I need?
Our license model is based on the number of developers who create
visualizations for Kontrast (i.e. who write code for their own
visualizations). Therefore, you need one user license for each
person working with Kontrast.
- Does the Kontrast usage license expire?
Once you bought a license, you may use Kontrast for as long as you
wish. Within one year of your purchase, you receive updates and
support from us. If you wish to continue to receive feature updates
and support beyond one year, you need to renew your license.
- Which browsers are supported?
We support all modern browsers, including Mozilla Firefox, Apple
Safari (iOS and MacOS), Google Chrome, and all Chromium-based
browsers such as Microsoft Edge, Opera, Samsung Internet, Brave, and
Vivaldi. Note that Internet Explorer is considered deprecated for
quite some time and is not supported.
- May I publish my visualizations including Kontrast?
Yes, for non-commercial purposes. Our license agreement explicitly
permits you to host/publish the Kontrast library for non-commercial
purposes in order for your visualizations to work. The viewers of
the visualizations do not require a license.
Can I obtain a free trial version of Kontrast for testing purposes?
Of course. Please
contact us via email or phone.
Can I hire you to create figures or specialized data analyses for
contact us via email or phone and we can
discuss your request, requirements, timing and pricing.
- How can I get updates?
From our download page. The documentation
contains an article on
how to update Kontrast.