David Karp (born July 6, 1986) is an American web developer and entrepreneur living in New York City. He is the founder and CEO of the short-form blogging platform, Tumblr.  Karp grew up on the Upper West Side of Manhattan. His parents are film and television composer Michael D. Karp and teacher Barbara Ackerman.  Karp attended The Calhoun School

from age 3 through 8th grade, where his mother teaches science.  At 11, he began learning HTML and was soon designing websites for local businesses. Karp went on to attend Bronx Science for one year before dropping out at the age of 15 and started homeschooling.  At the time, Karp had aspirations of getting into a college in New York or MIT and saw homeschooling and doing other projects on the side as a way to impress the colleges.   Karp never returned to high school or earned his high school diploma.

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