This tool is based on the work of user Arachobia on RPG Crossing with his permission. He had taken a list of tables from Dragon magazine #422 in an article called "Building Character" by Matt Sernett and updated them for 5th edition. I've turned them into an automatic tool for generating a characters background.

Instructions: Refresh the page to generate a new background story. As always, you can use it however you like and fill in your own details. Your age and acquired proficiencies are listed at the bottom and are based on the results you got. Try to pick a Race/Class/Background combo that fulfills all the proficiencies. Your age may also result in ability score modifiers that can be applied after building your character.

...or ignore everything and do whatever you want. Whatever.
Background Generator

(T.101): If this is your 1st roll on this table you were raised by animals or beasts. They can either be unintelligent creatures like wolves, or a sentient animal like a unicorn. You will have proficiency in Animal Handling. Continue on to Table 2 and it is up to you whether any siblings you have were your biological siblings, or your animal-parents own young, or a mixture.

(T.2): You are the youngest of a 7 sibling family.

(T.3): You were apprenticed or sent to be trained. Roll on Table 4 to determine who by or what as.

(T.4): Did you mean to sign up with a criminal? Find out their crimes on Table 15, then proceed to Table 26.

    >>>> (T.15): Impersonating a noble or other famous individual.

(T.26): You're given a job, roll on Table 15 to see what. However, you mess it up and are caught. The guild manages to pull enough strings to prevent you going straight to prison, but you have to escape the law on your own. Flee on Table 19.

    >>>> (T.15): Forgery.

(T.19): You are captured and (re)sold into slavery. Go to Table 16.

(T.16): You are liberated by an army and compelled to join them yourself on Table 22.

(T.22): You are a recognized hero who rises through the ranks. You will have +15% starting gold and proficiency in Athletics. Also, regardless of your background, you always have the Feature: Military Rank from the soldier background. Your life of adventure begins.


Total Rolls: 10
Your age is ADULT
Adults are at the most equalized stage of development. From here their physical body will begin to weaken while their minds and personalities benefit from experience.
Adults have no modifiers to their attributes.

Proficiencies:
Animal Handling
15% More Starting Gold
Athletics
Feature: Military Rank (Soldier background)