The Worldwide Developers Conference (WWDC) is an information technology conference held annually by Apple Inc. The conference is currently held at Apple Park in California. The event is used to showcase new software and technologies in the macOS, iOS, iPadOS, watchOS, tvOS, and visionOS families as well as other Apple software; new hardware products are sometimes announced as well. WWDC is also an event hosted for third-party software developers that work on apps for iPhones, iPads, Macs, and other Apple devices. Attendees can participate in hands-on labs with Apple engineers and attend in-depth sessions covering a wide variety of topics.

The first WWDC was held in 1983, with the introduction of Apple Basic, but it was not until 2002 that Apple started using the conference as a major launchpad for new products. Beginning in 1987, WWDC was held in Santa Clara. After 15 years in nearby San Jose, the conference moved to San Francisco, where it eventually became Apple's primary media event of the year and regularly sold out. WWDC returned to San Jose 13 years later.

WWDC 2020 and WWDC 2021 were hosted as online-only conferences due to the COVID-19 pandemic. WWDC 2022 invited developers and the press back to Apple Park for the first time in about three years despite the COVID-19 pandemic. Customers and consumers watched the event via online live streams. All of these events were hosted at Apple Park in Cupertino, California. WWDC 2023 and 2024 were held both online and in-person. The most recent conference, WWDC 2025, was held both online and in-person from June 9 to June 13, 2025.

Until 2020, a $1,599 ticket was required to enter the conference. Tickets were obtained through an online lottery. Scholarships are available for students and members of STEM organizations. Attendees must be 13 years old or older and must be a member of an Apple Developer program.

Until 2007, the number of attendees varied between 2,000 and 4,200; however, during WWDC 2007, Steve Jobs noted that there were more than 5,000 attendees. The WWDC events held from 2008 to 2015 were capped, and sold out at 5,000 attendees (5,200 including special attendees). WWDC 2018 had 6,000 attendees from 77 countries, including 350 scholarship recipients.

WWDC is held annually from Monday to Friday on one week in June. The conference consists primarily of a keynote address, presentation sessions, one-on-one "lab" consultations, and special get-togethers and events.

The conference begins with a Monday morning keynote address by Tim Cook and other Apple executives. (From 1998 until his resignation and death in 2011, Steve Jobs gave the keynote address, which the media often called the Stevenote.) It is attended by both conference attendees and the media, since Apple regularly makes product announcements at the event. Hardware announced during the address is sometimes exhibited in the conference hall afterwards. The keynote address is followed in the afternoon by a Platforms State of the Union address, which highlights and demonstrates changes in Apple's software developer platforms that are detailed in sessions later in the week. The Apple Design Awards are also announced on the first day of the conference.

Several session tracks run simultaneously from Tuesday through Friday. The presentations cover programming, design, and other topics and range from introductory to advanced. Almost all regularly scheduled presentations are delivered by Apple employees. These presentations are streamed live, and recordings can be viewed on demand on the Apple Developer website in the conference's iOS and tvOS applications. Lunchtime sessions are given by a variety of guest speakers who are industry experts in technology and science; these sessions are not streamed or recorded. In the past, some sessions included question-and-answer time, and a popular Stump the Experts session featured interaction between Apple employees and attendees.