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Rental Agreement Red-Flag Explainer

Upload a rental agreement and see risky clauses explained in plain language.

Intermediate14h1–3 people16/20 fit
TL;DR

Build Rental Agreement Red-Flag Explainer for students and first-time renters in ~14h with 1–3 people. Stack: PDF.js + LLM + Next.js + Tailwind.

Why it wins: Everyone has signed a document they did not read, so judges instantly feel the problem.

Build flow

01 · Problem
Renters sign 15-page agreements they do not understand and miss lock-in, deposit and penalty clauses.
02 · Solution
Parse the PDF, split it into clauses, have an LLM label each as standard, unusual or risky with a one-line plain-language explanation and a question to ask the landlord.
03 · Build
  1. 1Extract text with PDF.js and split on numbered headings
  2. 2Prompt the LLM per clause with a fixed risk rubric
  3. 3Render a colour-coded clause list
  4. 4Add a one-page summary export
04 · Demo
Upload a real (anonymised) lease and jump straight to the three red flags with their suggested questions.

MVP checklist

  • Clause-by-clause risk labels
  • Plain-language explanations
  • Questions to ask before signing
  • Shareable summary

Tech stack

TechRole
PDF.jsPDF parsing in the browser
LLMLanguage model
Next.jsFrontend + API routes
TailwindStyling

Reference repos

Open-source projects you can build on. Links checked 2026-10-31.

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