To renew your U.S. visa, complete the DS-160 application online and schedule an interview at a U.S. embassy or consulate in your home country

To extend your stay in the U.S., submit Form I-539 (Application to Extend/Change Nonimmigrant Status) to USCIS before your current visa expires

Apply for an extension at least 45 days before your authorized stay ends and provide updated supporting documents proving your eligibility

Check whether your visa category allows for renewal or extension, as some categories (like those under the Visa Waiver Program) are not eligible for extension from within the U.S.