EU law on EUR-Lex, with its connections

Eureka is a browser extension that works on EUR-Lex itself. In the HTML view of an act it makes defined terms and references clickable in all 24 official languages, shows the case law per article, the act's timeline and what changed between versions, and lets you follow acts and receive alerts.

Get Eureka

Works in Chrome and Edge. Free during the beta.

Defined terms and references

Click a defined term to read its definition, or a reference such as "Article 6(1)(c)" or another act to read the provision it points to, without leaving the page. In all 24 languages.

Case law per article

Each article shows how many judgments interpret or cite it, as recorded by the Publications Office. Click the count for the list of cases, with links to EUR-Lex.

Timeline and what changed

The dates from which the act's provisions apply, and a word-by-word comparison of each changed article between consolidated versions, with the amending act named.

Follow acts, get alerts

Follow an act or an article and be notified of new events for it, such as an amendment, a corrigendum or a judgment: in the extension, and by e-mail once you sign in.

How it works

PLACEHOLDER screenshot of an older version, to be replaced: an act on EUR-Lex with and without Eureka

On EUR-Lex itself, in the HTML view of an act

  • Open an act on eur-lex.europa.eu in the HTML view. Eureka adds to that page and does not replace it. It does nothing on the PDF or Official Journal views.
  • Defined terms and references in the text become links. Clicking one opens a card in a sidebar on the right, next to the text you are reading. Links inside a card open further cards.
  • The sidebar also holds the table of contents, a glossary of the act's defined terms, the act's status (in force, consolidated, no longer in force), its events, the timeline, the case law and the versions.
  • Definitions and articles are shown as published on EUR-Lex; the text of the act is never paraphrased. Some features are AI-generated evaluations (translation notices, timeline entries, summaries of changes, corrigenda verdicts). Each one is marked "AI" and may be wrong.

Eureka is in beta

Everything is included free of charge while the beta lasts. If something does not work on a page, please tell us through the contact form below and include the page's address.

Pricing

Free during the beta. Afterwards there will be two plans: Basic (definitions, references, structure, status and events) and Pro (adds case law, timeline, what changed, AI translation notices and e-mail alerts). Students with a university e-mail address get Pro free, and new accounts get a one-month trial of Pro.

See plans and pricing

Frequently Asked Questions

  • Eureka only works on the HTML view of an act (the address contains /TXT/HTML/), not on the PDF or Official Journal views. Choose "HTML" among the formats offered for the act on EUR-Lex. If it still does not work, please contact us with the page's address.

    The formats offered for an act on EUR-Lex, with the HTML view selected

  • On a company computer, the IT department often has to allow the extension first. The page For IT departments gives them the extension id, the policy settings for Chrome and Edge, and what data the extension sends. Browsers other than Chrome and Edge are not supported.

  • Not on its own. AI-generated evaluations are marked "AI"; they are aids to reading, not legal advice, and they can be wrong. Definitions and articles are shown as published on EUR-Lex. Only the Official Journal of the European Union is authentic.

  • No. The extension works without signing in. An account is needed for e-mail alerts and to keep your follows when you use Eureka in more than one browser. Install explains how to sign in from the extension.

Contact

If you have questions, suggestions or anything else, please let us know below.