Renewing your U.S. passport by mail is easier than you think—no long lines, no appointments. This step-by-step guide walks you through the entire process using Form DS-82, including eligibility, filling out the form online, attaching the right documents, submitting a passport photo, paying the fees, and mailing everything correctly. Whether you're planning ahead or your travel is fast approaching, this guide will help you renew your passport hassle-free in 2025.