Sharing patterns


Following some recent exchanges, it seems important to me to clarify certain points concerning the registration of patterns with Seizenn.

The different tools work in much the same way, what is explained here is as valid for realistic patterns, grid patterns, card weaving patterns or heddle.

Share a pattern

In the “Load, Save, Export” menu there is the button   (or depending on your choice). Until now the accompanying text was “save”. Following a few misuse, I decided to rename it to “share” which better corresponds to its objective.

This button save your pattern on my personal database that I make available so that weavers can present their work, make it available to others. It’s a service that I offer, but storage is not infinite and has a cost. If I want to keep service free, I can’t afford to everyone to save every draft. And it appears that I unfortunately have to monitor a little what is saved.

By default, any shared model appears on the page 

From the list of your patterns you have the possibility of not displaying a pattern in the public list (‘restrict’) and of no longer displaying it in your list (‘delete’).

Attention, in all cases your model remains accessible via its short code. It is not deleted from the database. Only its visibility in the list page is modified. (If you need to do a specific action on one of your pattern, ask me.)

The patterns you saved remain yours. If not deleted, your name and recording date appear next to the thumbnail  .


An attribution problem

Nothing prevents a user from opening one of your patterns (that’s the goal of Seizenn !!!) and sharing it in turn (it’s a misuse). In this case, the same pattern therefore appears twice in the list, with two different authors.

That’s what happened when an undoubtedly well-meaning user recorded all the patterns (s)he liked. That is to say almost all of them. Not only does it take up space on the server for no benefit, but it can also give the impression that this user is appropriating the work of others. And ultimately discourage other weavers from sharing their work.

I had to email this user and remove the duplicate patterns.

I also added a confirmation screen before sharing to disambiguate:

As there was obviously a real need that I hadn’t thought of initially, I added a “like it” button which allows you to build a list of the models you like.

This list is only saved on your computer, it has no impact on the server.

Local pattern saving

It can be particularly interesting to publish very close versions of the same pattern in order to discuss the preferences of other users, to gradually improve a pattern with several people via network sharing. When you look at Annie MacHale’s work, the quality of a band can be tied to a very small detail (see for example design-and.html).

But when building a pickup-type model, it is not useful to use the button at each stage of the work.

With the new version, the model you are working on is automatically saved in your browser. This is what makes it possible to have a function for undoing the last actions.

If you shut down your computer and then open Seizenn again with the same web-browser you should see your pattern.

No need to upload your draft before it’s finished.

In some cases you may wish to avoid using the button. For example when you are in a place without a network but want to save your work. Or you consider that you are taking too big a risk by hosting your work on my server (if you use Seizenn to write a book, don’t forget to contact me please). In those cases, you can find your pattern description in the “load, save” menu on the left.

Copy the content of the textarea (“m=…”) somewhere to keep track of your pattern. You can send it by mail etc. To load your pattern back, just paste the text in the textarea and click the button.

Other technical solutions would be possible with more work and if there is a clear need.

EDIT 04/01/2022

There is now a button to save your pattern on your computer.

The saved patterns appear at the bottom of the pattern page

I hope these details will be useful to you.

Double-faced tablet weaving with Seizenn


I added a simple tool to draw tablet weaving pattern : Here is a post to demonstrate how it works for double-faced patterns.

First, in the main menu of seizen open the «tablet weaving tool». It works the same way other Seizenn tools.

On the left menu, in the “Load, Save, Export” menu, you can choose the size of your pattern and click on the “create” button

As you want to create a “double faced” pattern, in the “tools” menu, choose a “Double-faced” threading and a “2+2” rotations (repetition of 2 fronts and 2 backs)

You now have a blank pattern, ready to draw on it.

Like with the other seizenn pages, the colors are selected from the color palette. Default threading use the 2 first colors. You can of course change them.

On the “Edit Mode” menu, choose “double-faced mode”

Now, when you click on the pattern, you flip two cases, as required to draw a double-faced pattern. You can change the weft color by left clicking on the down left square with the wanted color selected.

If you click on the first row, it will change the hole which is upside at the begin. Useful for standard tablet-weaving. Maybe less for double-faced pattern.

You also can do some actions depending on where you right clicks (add cards or pick, change twining etc.).

GTT is a very great tool, and many patterns made with it are available. You can find some on

On the “Load, Save, Export” menu you can load GTT file. (GTT is very powerfull, not all kind of pattern can be read with Seizenn)

If you choose the wolf :

Watch out, Seizenn doesn’t use the colors from the pattern file. I made this choice because you may not have in your shelves (in your main and loom palettes) exactly the colors that was used by the person who created the pattern. And colors are very simple to change with Seizenn.

If you want to work with square pattern, show rotation changes, turning etc, choose the optinos in the «Display option» menu. You can get for example :

The Sulawesi tool works quite the same.

(link to this pattern

I keep working to understand how to better support tablet weaving with Seizenn (notation problems, empty holes)


A few improvements for this new year


For this new year I present to you some small improvements for Seizenn.

Lists of patterns

When you save a pattern, it is by default visible for everyone in the public list. It’s now possible to make it private using the “restrict” button in you private list.

Loom colors

You can have colors in your «loom palette» that are not used in your pattern. Now those colors are bordered with brown like this :

Rigid heddle pattern

In loom editor you can load default pattern for some popular rigid heddle

You then get

New tools

Seizenn was first designed for plain weave or baltik bands. I then added a grid tool. I recently wanted to explore some other weaving technics.

Now you have two new tools.

The first one to draw heddle loom patterns

A second one to draw tablet patterns

Those tools are very simple, I mainly created them to undestand how those kinds of pattern work. They reuse main principles of seizenn, and I just added a few new things like right-click menu in tablet tool.

I could improve them if they would be useful for someone.