The latest articles on DEV Community by Francisco Javier Noves Moreno (@francisco_javiernovesmo). https://dev.to/francisco_javiernovesmo https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4024300%2F78dffab8-d473-45ac-b84c-de25bfdf44dd.png https://dev.to/francisco_javiernovesmo en Francisco Javier Noves Moreno Fri, 10 Jul 2026 16:30:17 +0000 https://dev.to/francisco_javiernovesmo/how-i-built-a-chrome-extension-that-reads-terms-of-service-using-ai-and-what-i-found-1mi https://dev.to/francisco_javiernovesmo/how-i-built-a-chrome-extension-that-reads-terms-of-service-using-ai-and-what-i-found-1mi <h2> The problem that made me build this </h2> <p>Every time I signed up for a new app or service, I clicked "I Agree" without reading a single line. Nobody reads Terms of Service. They're 30+ pages of dense legal language designed to be ignored.</p> <p>But I kept hearing horror stories:</p> <ul> <li>Apps training their AI on your private photos</li> <li>Subscriptions auto-renewing for €99/year after a free trial</li> <li>Platforms stripping your right to sue them (forced arbitration)</li> <li>Companies sharing your data with hundreds of "partners"</li> </ul> <p>So I built <strong>ToS Radar PRO</strong> — a Chrome extension that reads the fine print so you don't have to.</p> <h2> How it works </h2> <p>The extension uses AI to scan any Terms of Service or Privacy Policy page and flags six categories of dangerous clauses:</p> <ol> <li> <strong>AI/Data Scraping</strong> — "We may use your content to train our AI models"</li> <li> <strong>Forced Arbitration</strong> — You waive your right to take them to court</li> <li> <strong>Auto-Renewals</strong> — Subscription traps buried in paragraph 47</li> <li> <strong>Data Sharing</strong> — Your data sold to advertisers and data brokers</li> <li> <strong>Unilateral Changes</strong> — They can change the terms anytime without notice</li> <li> <strong>Account Termination</strong> — They can delete your account for any reason</li> </ol> <p>The key architectural decision: <strong>everything runs locally in your browser</strong>. No API calls, no external servers, no data leaving your machine. Pure privacy.</p> <h2> Tech stack </h2> <ul> <li>Chrome Extension Manifest V3</li> <li>Vanilla JavaScript (no frameworks — keeping it lean)</li> <li>Local AI inference via the browser</li> <li>Zero external dependencies</li> </ul> <h2> What I found while testing </h2> <p>After running it against 50+ popular websites, here are the most common traps:</p> <ul> <li> <strong>97%</strong> of apps reserve the right to train AI on your data</li> <li> <strong>83%</strong> include forced arbitration clauses</li> <li> <strong>76%</strong> have auto-renewal terms that are hard to find</li> <li> <strong>100%</strong> reserve the right to change terms at any time</li> </ul> <p>The worst offenders? Social media platforms and productivity SaaS tools.</p> <h2> Try it free </h2> <p>ToS Radar PRO is completely free on the Chrome Web Store:</p> <p><a href="https://chromewebstore.google.com/detail/tos-radar-pro-%E2%80%93-ai-legal/ldmpbnpnflpglocpaocojmlffnbglngi" rel="noopener noreferrer">Install ToS Radar PRO</a></p> <p>Would love feedback from the DEV community — especially on the tech approach and features you'd want added. What clauses do you care about most?</p> chromeextension ai privacy webdev