This edition took place October 28–30, 2026 in Barcelona. It has ended.
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Mozilla Festival 2026
Mozilla Foundation
At a glance
- Dates
- October 28–30, 2026
- Where
- Barcelona, Spain
- Format
- in-person
- Primary topic
- Networking · also Infrastructure, Cloud, AI
- Tickets
- See the official site
- Call for papers
- No deadline on record — see the official site
- Organizer
- Mozilla Foundation
- Official link
- Checked on October 30, 2026
Official link last checked: October 30, 2026 · how we verify
Information aggregated automatically. Verify all dates, locations, and pricing on the official conference website before making arrangements.
About
Mozilla Festival, widely known as MozFest, is a gathering associated with the Mozilla Foundation that brings together technologists, researchers, activists, artists and educators around the health of the internet. Its scope extends well beyond software engineering, covering open source, data, artificial intelligence, infrastructure and the social questions raised by how technology is built and governed. The event appeals to people who care about an open, inclusive and trustworthy web. The 2026 edition is listed for Barcelona, Spain, from 28 to 30 October as an in-person festival. Hosting MozFest in a major European city places it within reach of a large international community, and the multi-day format allows for a broad spread of themes and conversations. Programme specifics and venue details should be checked on the official festival page. Participants can expect a varied mix of sessions, discussions and community-led activities, with an emphasis on collaboration across disciplines rather than one-way presentations. The festival is a place to meet people working on open source projects, responsible AI and digital rights. For the open internet movement, this Mozilla Festival 2026 in Barcelona is an important moment to share ideas, form partnerships and shape a more accountable technology landscape.
FAQ — Mozilla Festival 2026
When and where does Mozilla Festival 2026 take place?+
Mozilla Festival 2026 takes place October 28–30, 2026 in Barcelona, Spain.
Is Mozilla Festival 2026 in-person or online?+
Mozilla Festival 2026 is an in-person event.
Who organizes Mozilla Festival 2026?+
Mozilla Festival 2026 is organized by Mozilla Foundation.
How do I register for Mozilla Festival 2026?+
Registration and tickets are handled on the official website, mozillafestival.org. conventions.io links only to the organizer's own domain, last checked October 30, 2026.
What topics does Mozilla Festival 2026 cover?+
Mozilla Festival 2026 covers Networking, Infrastructure, Cloud, AI, Data, Machine Learning.
How many days is Mozilla Festival 2026?+
Mozilla Festival 2026 runs for 3 days, October 28–30, 2026.
Is there a next edition after Mozilla Festival 2026?+
No later edition has been announced on the organizer's site yet. This page is kept as the archive of the 2026 edition.
Travel questions? See Good to know in the travel guide below.
Planning your trip to Barcelona
Contains sponsored linksMozFest arrives in Barcelona at the end of October, and its open-web, civic-technology crowd tends to gravitate to Poblenou rather than the tourist core. The old textile district east of the centre was rebuilt as an innovation quarter, and its wide grid of converted factories, co-working halls and a genuinely local rambla sits ten minutes from the beach. Late October still delivers twenty-degree afternoons and empty sand.
Getting there & around
El Prat (BCN) is 15 kilometres south-west. The Aerobús runs to Plaça Catalunya in about 35 minutes, Metro line L9 Sud connects with the wider network, and the R2 Nord train reaches Sants and Passeig de Gràcia in around 25 minutes for the price of a normal fare. High-speed rail links Madrid to Sants in two and a half hours.
Skip the taxi queue — pre-book a fixed-price airport transfer with Welcome Pickups. Exploring beyond the city? compare rental cars on Auto Europe.
Staying connected
City Wi-Fi hotspots exist but are slow, while mobile coverage is excellent including on the Metro. An eSIM is the simplest option for non-EU attendees, since Spanish prepaid SIMs require registration with a passport. Set up an eSIM with Airalo before you board and you're online the moment you land.
After the sessions
Sagrada Família. Gaudí's basilica is still unfinished and still the most extraordinary building in the city, particularly late in the afternoon when western light comes through the warm-toned windows. Entry is timed and sells out days ahead. Ninety minutes covers the interior; the tower lifts need a separate ticket. Tickets on Tiqets →
Parc de la Ciutadella. Barcelona's central park occupies the site of a demolished fortress, with a cascade fountain Gaudí worked on as a student and a boating lake among the plane trees. It sits between the Born district and Poblenou, making it the natural walking route between the old city and the tech quarter.
Bunkers del Carmel. Civil-war anti-aircraft emplacements on a hill above Gràcia give the best free panorama in Barcelona, taking in the whole grid down to the sea. It is a steep twenty-minute climb from the nearest bus stop. Sunset draws a crowd; early morning has the light and the quiet.
Poblenou and its rambla. The Rambla del Poblenou runs from the innovation district down to Bogatell beach, lined with the kind of neighbourhood cafés and vermouth bars that have been squeezed out of the centre. It is where festival attendees end up in the evening, and the walk to the water takes fifteen minutes.
Good to know
How warm is Barcelona at the end of October?
Highs of about 20 to 22°C with mild evenings and occasional heavy autumn showers. The sea is still around 21°C, so swimming is possible if not universally appealing.
What happens around 1 November?
All Saints' Day is a public holiday in Catalonia, marked locally with the Castanyada and roasted chestnut stalls. Many shops close, though restaurants and attractions largely stay open.
Any practical warnings?
Pickpocketing on the Metro, at Sants station and along the Rambla is persistent and organised. Bags in front, phones away from café terrace tables, and nothing valuable in back pockets.
Travel notes written for Mozilla Festival attendees. Links marked above are affiliate links — we may earn a commission at no cost to you. Verify schedules and opening hours on official websites before you travel.
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