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W3C TPAC 2021

Welcome to our W3C annual conference!

If you are already registered and you have received the second confirmation email you may go directly to the TPAC Attendee Hub.

W3C's virtual 2021 TPAC focuses on collaborative meetings that gather the community to create momentum and collective brainstorming.

This event brings together W3C technical groups, the Advisory Board, the TAG and the Advisory Committee for exciting, coordinated work. The benefit of assembling the community for thought-provoking discussions is invaluable.

Update – 22 October 2021: The first minutes, videos and slides of the breakout sessions are available.

For more details about TPAC:

Watch the TPAC video Watch it on YouTube

Listen to the audio description:

W3C meetings operate under our Code of Ethics and Professional Conduct.

What does TPAC stand for?

TPAC historically stands for Technical Plenary and Advisory Committee, since in its initial physical format, it gathered in a single place a meeting of the W3C Advisory Committee (where each W3C Member has a representative) and a broad set of technical group meetings, culminating in a plenary day – the technical plenary.

In recent years, the plenary format had mostly been replaced by an unconference format organized as a series of one-hour sessions on topics brought by the attendees. In its current virtual format, there isn't as much of an opportunity for a ‘plenary’ meeting in any case, and for practical reasons, the Advisory Committee meeting part of the event is held somewhat apart from the rest of the technical meetings.

The name TPAC is familiar enough to regular W3C participants that we are still using the name in these new circumstances, but we are trying to reference it more broadly as ‘W3C Annual Conference’ to make it easier to understand.

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Participation and Registration

Before you register, take a moment to watch the TPAC 2021 logistics video or listen to the audio description,

Watch the logistics video

Listen to the audio description:

and read the participation policies and recommendations:

See participation rules

Meeting Registration is now open!

Register for full TPAC event as a W3C participant Register for public breakouts only
(no W3C account needed)

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Schedule and format

See full 18-29 October agenda sessions

12 Oct
AC meeting (member-only)
18–22 Oct
breakout sessions, social events
25–29 Oct
group & joint meetings
18–29 Oct
expo space
18–29 Oct
… and videos:
group updates & demos

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Title sponsor

Coil Technologies,

Media sponsor


Silver exhibitor

Movement for an open web

Bronze exhibitor


For further details, contact