How it works. A sheet auto-saves in this browser once it has a name. Renaming a sheet renames its save. Use the tabs to move between the three pages, and click dots and boxes to set them (click the last filled dot again to remove it). Print prints all three pages of the current character, one per US Letter sheet, and Print Blank prints an empty set. Export downloads every sheet as a JSON file and Import merges a file like that back in (a sheet with the same name is replaced). Nothing leaves your browser.
Sample sheets. Load sample characters adds all 76 Kindred from Sample Characters (20 solo vampires and 16 coteries of two to six, with each coterie's name, domain, premise and roster under Chronicle, Notes and History), replacing any saved sheet with the same name just as Import does and leaving your other sheets alone; you can also download the sample sheet file and import it yourself. Each starts undamaged at Hunger 1.
Worked out for you. Health is Stamina + 3 boxes and Willpower is Composure + Resolve. Resisting frenzy rolls your unmarked Willpower boxes plus a third of your Humanity, rounded down, and a Remorse roll uses the Humanity boxes that are neither filled nor stained. The Blood Potency effects come from the corrected V5 table (the 2020 Companion, Players Guide and recent printings). The Dice-Pool Helper adds an Attribute to a Skill or Discipline, adds your Blood Potency power bonus to Discipline pools and your Blood Surge dice when you surge, and shows how many of the dice are Hunger dice. See Character Creation, Core Rules, Clans & Disciplines and the Dice Roller.