This is literally their entire site. I am so depressed right now.

<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8" /> <link rel="icon" type="image/png" href="./favicon.ico" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <title>Karektar</title> <script type="module" crossorigin src="./assets/index-f8e9a3f5.js"></script> <link rel="stylesheet" href="./assets/index-90296a42.css"> </head> <body> <div id="root"></div> </body> </html>

edit: I'd rather look for similar offline tool, written in C and working not just in latest browsers.