Enter symbols or initials for characters in the text box, separated by commas (the text box will accept basic html, including img tags, but keep them small).
To add a ship symbol, click your mouse on a grid square: once for hearts, twice for diamonds, three times for spades, four times for clubs, five times to clear again.
To restart, reload page, or clear text box and enter new character list.
To get your current grid as an HTML table (suitable for posting on social media, etc.), click the "save as HTML" button, and then copy-paste the output. Note that the output table will have default table styling (and will not be clickable.)
To save a grid for later editing, copy+paste a previous "save as html" output into text box under Import Save and press button. (It will appear as saved, including any rule-check options - you can select new options after the import.)
To save your current grid as an image file, press the printscreen key and then paste into your favorite image editing program
Here are some cheats you can copy and paste into the entry box for your character list, if you want fully coded Homestuck character symbols. Note that some unicode symbols may not display on all browsers or systems. You can combine or re-order these lists, just make sure there is a comma between every entry.