A law student has to read 50 pages of case law before tomorrow's class. A startup founder just received a 30-page investment contract she needs to understand. A journalist is researching a story and has 20 government reports to get through.

What if they each had a tool where they could upload any document and instantly get a structured summary: the main argument in one paragraph, key facts in bullet points, important quotes highlighted, and a "questions to ask" section pointing out things that seem unclear or contradictory?

That's not hypothetical. Document summarizers are one of the most popular AI tools people build. They're practical, immediately useful, and surprisingly straightforward to create. The challenge isn't getting AI to summarize. It's building a reliable pipeline that handles documents of any length and format.