Welcome to Twenty Sided Tools.
Goals
This is a reimagining of the rules of a popular tabletop roleplaying game. It's built on the default idea that the character sheet should only list things that differ from normal, and be optimized to be as concise as possible.
Imagine a commoner with 1 Hit Point, 1 attack, and all average ability scores with no bonus, no armor, etc. That commoner would roll 1d20 and generally be successful in attacking another commoner on a score of 10 or higher. Only when that commoner has a weapon, class skills, or nonzero ability score bonuses would that meaningfully matter.
Fast generation
To keep things simple, you pick your character's defining "Prime" attributes, equivalent to a 15 / +2 bonus to the score. This way you focus more on the kind of character you want to play and not the math behind it.
The whole generation process is on one screen and you can see a preview of your character instantly.
Only what you need
This lists only what you need to know, since the final calculations matters. All class features are baked into the math.
If it's not there, you just roll 1d20 with no bonus.
All spells and abilities have the calculation removed; all you see are the calculated numbers.
No negative numbers
This smooths out abilities to exclude negative numbers for easier math. Roll under 10? It just fails, since no difficulty challenge should be below that to avoid excess rolls.
It also creates a baseline where the attack roll and defense numbers can be the same. Count your success as the number in excess of 10. Armor Class 4 means you roll a 14 or higher to hit.
More compact
The sheet is designed to fit into half a page so you have more room at the table. Fold it in half; the top half is your character and the rest are rule shortcuts to help you out.
First-class printing
This is designed to have easily printable sheets and guides.