Ronin is an image processing tool.

The application interprets a dialect of LISP to automate simple graphical tasks, like resizing, cropping, coloring, and generating procedural imagery. You can look at these example files to better understand how this all works.

The first version of Ronin was produced in Ensenada, Mexico in 2016 after Rekka's Macbook died. It was re-released later in 2019 in Japan.


We create our own tools, built light to reduce our energy use, also to lessen our dependence on closed-source applications we can't repair ourselves. Ronin works in the browser. It is bundled as a single file of 55kb, runs offline and has no dependencies.

The reason we did this, is because we want to ensure that users — us included — have access to these tools no matter what. We want our ecosystem of tools to be...

Read more about our design philosophy


Meet Robit, the mascot for Ronin. Robit is there to talk about updates relating to Ronin.


web version

If you don't wish to download the build(55kb), and if you have access to a reliable internet connection, you can use Ronin in your browser.

Use Ronin Live


Because Ronin Live isn't available through a client, it is harder to receive donations. Donations mean we can spend time improving this tool, and offering support when needed.

Make a donation with...



Watch the video above.


You can change the look and colour of Ronin. To do this, download themes from our page. You can view the colour palettes of each theme in the preview, once you find something you like, drag the file (.svg file) onto Ronin. The colours will change instantly.

These themes are part of the Ecosystem Theme, which means that you can apply a theme to any supported app (Dotgrid, Donsol, Orca and Left). Pull Requests are welcome, but please read our design philosophy first.

You can also create your own themes.