How I Automated Finding Contact Emails from Any Website

Every sales team needs leads. Every lead starts with an email address. Here's how I automated finding contact emails from any website. The Problem You find a company that could be a customer. You visit their website. The "Contact Us" page has a form — no email visible. The About page lists team members but no addresses. Manually digging through HTML source code for mailto: links, checking social profiles, or guessing email formats ( firstname@company.com ) is tedious and scales terribly. The Automated Approach I built a tool that crawls any website and extracts every email address it finds. Here's how it works: Start from the homepage — fetch HTML Extract emails from the page — regex pattern matching for email formats Follow internal links — Contact, About, Team, Careers pages Check common locations — footer, header, JavaScript bundles, meta tags Deduplicate and validate — remove duplicates, verify format The regex pattern handles edge cases: // Handles standard emails + obfuscated one