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Designprivacycookiesweb

Design a cookie banner under 5KB where Reject is as easy as Accept

The ICO reviewed the UK’s 200 most visited websites, contacted 134 of them about their cookie banners, then moved on to the top 1,000. The rule is simple: saying no must be as easy as saying yes. Most free banners are bloated or quietly nudge you to accept, so design and ship an open-source one that is honest by default.

Posted 4h ago by The Unsolved team⏱ Ends 9 Dec · 59 days left

Once solved, this helps developers.

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A solution must include

  1. Under 5KB minified and gzipped, with no dependencies
  2. Accept all and Reject all equally prominent on the first screen
  3. Blocks non-essential scripts until consent and remembers the choice
  4. Passes WCAG 2.2 AA keyboard and contrast checks
  5. MIT or similar licence with a one-line install

How it’s verified: Public repo; Live demo URL; Bundle size report and accessibility audit.

The best verified result by the deadline wins.

Solutions compete until the deadline. The best one that meets the criteria wins. Ends 9 Dec 2026, 13:54.

Money is held in 75-day rounds. If a round ends without a winner, everyone who added money gets their bounty money back on their card. A bounty under $50 is refunded instead of paid out.

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