01
Visualize standards data
Turn standards data into a useful visualization, dashboard, or report.
Any web technology 90 minutes
Dublin, Ireland · TPAC 2026
W3C TPAC hackathon
Two challenges, 90 minutes to build, and an evening of demos. Bring your laptop and try an idea.
Free for TPAC attendees
Solo or in pairs
All experience levels
Light dinner provided
From the evening
Projects
Built in 90 minutes on the night. Thank you to everyone who hacked, demoed, and voted.
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State of Web Standards
A live dashboard over w3c/browser-specs: 800+ specs, who owns them, and how mature they are. Clickable charts filter a searchable, deep-linkable spec explorer.
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Web Platform Planet
26 years of caniuse.com data as a living planet: every feature is a mountain that grows as browser support spreads. Rendered with WebGPU, steered by head pose through WebNN, and driven by voice.
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ASKM Explorer
Pivot between WCAG and other accessibility standards to see how they overlap and differ, built on the Accessibility Standards Knowledge Model.
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Winner
Horizontal Review Dashboard
Shows horizontal review progress for a given spec, without scanning through countless labels and issues.
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Open Source Software at W3C
A first visualization of the open-source projects W3C develops or relies on, maintained in w3c/ossref, to replace the outdated Open Source Software page.
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Awesome Browser Specs
A demoscene production about every spec the web runs on, in eight parts, with a soundtrack and robot voices synthesized live in the browser.
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Funder dashboard for W3C specs
Enter a spec shortname for live facts on its time in process, editors, horizontal review, and repository activity, framed to help public-interest funders see where investment could help.
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Winner
Time-to-REC
How long do W3C specs take? Thirty years of /TR history as time to Recommendation by Working Group, a publication heatmap, and the specs still waiting.
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Winner
WebRef Visualized
Visualizes the references between specifications.
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Symbol Viewer
A browser extension that shows content marked up with the Adapt TF's proposed AAC Symbols markup in a choice of two symbol sets.
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Agents with Legal Agency
Gives an AI agent a Data Rights Credential (VC 2.0, iSHARE profile) that data custodians verify against a trusted list before releasing data, sending signed receipts back to the owner.
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Winner
W3C Dory
A Chrome extension that keeps you logged in to W3C and, after logging in, takes you back to the page you were heading to.
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WebIDL checker fix
The parser behind W3C's WebIDL checker rejected reserved identifiers like toString as argument names, which the spec allows. Fixed with tests and sent upstream.
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SpecQuest
Turns W3C specs into an 8-bit, NES-style quiz game right on the page, with pixel visuals and chiptune sound effects. Sound on!
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ReSpec to EPUB
Download a long W3C document as an EPUB to read on an e-book reader, reviving an idea from ReSpec's earlier EPUB export.
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Resurrect W3C-LogValidator!
What it takes to run W3C's Perl LogValidator in 2026, from an unreachable CVS server to long-deprecated syntax, and a case for moving it to GitHub.
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CSS Types
A proposed WebRef feature: pick a CSS data type to list every property, at-rule, and function that accepts it.
The challenges
02
Improve a W3C tool
Contribute to your favorite W3C tool: fix a bug, improve documentation, or add a useful feature.
Any web technology 90 minutes
Schedule
26 October 2026
All times GMT · Dublin
Arrive & get together
Light dinner, introductions, and an overview of the challenges.
Time to build
90 minutes. Build an individual project.
Submit your project
Lightning demos and voting
Prizes and close
Taking part
Rules
- You have 90 minutes to build or sketch.
- Work solo — each submission must be your own individual project.
- Build it on the night. Reusing your own snippets is fine.
- AI tools are allowed — just be ready to explain your process.
How to enter
- Create a GitHub repository for your project.
- Put your code and anything else you made in it.
- Post your entry as a comment in the issue thread for your challenge: project title, your name, what it does, the repository URL, and a screenshot or other visual of your project.
Demos
- Each participant gets 60 seconds to demo their project.
- Please have a link, screenshot, GIF, or short recording ready that others can view.
- Keep it snappy: explain what you built, show the coolest part, and tell us why it's interesting.
- No live setup or debugging. We'll save questions and conversations for afterwards.
Voting
- Everyone gets exactly 3 votes.
- Vote by reacting with 👍 to three different project comments in the GitHub voting issue.
- Please don't vote for your own submission.
- Voting closes at the announced time.
- Each person can win only one prize.
FAQ
Do I need to prepare anything?
No preparation is required. Bring your laptop and a browser. If you plan to contribute to a W3C tool, you can check its contribution guidelines and set up your development environment beforehand.
Do I need to be a TPAC attendee?
The hackathon is open to everyone attending TPAC 2026. If you are in Dublin that week and not registered for TPAC, get in touch.
What if I do not finish?
Submit what you have. Sketches and unfinished prototypes are welcome.
Can I use a framework, or AI?
Yes. Any framework or AI tool is welcome. Be ready to explain your approach.
How is it judged?
Everyone gets three votes. After the lightning demos, vote for your three favourite individual submissions by reacting with 👍 in the GitHub voting issue. The most-voted eligible submission wins the main prize, with the other prizes awarded to different participants.
With support from
