Privacy

Last updated: September 1, 2026

The short version

When you analyze a Wikipedia article, the article’s title, its language edition, and your chosen event date are sent to the HistoryRewritten service, which fetches public revision statistics from Wikimedia and returns the analysis. Nothing else about your browsing is sent or stored.

What the website and Chrome extension send

• The Wikipedia project (for example en.wikipedia.org) and the article title being analyzed.
• The event date you selected (or the extension auto-matched from the article’s own text).
• For an explicit comparison request: which revision to compare against.

The extension activates only on https://*.wikipedia.org/wiki/* pages, and its keyword matching (to suggest a relevant event) runs entirely in your browser — the article text it reads never leaves your device. An article’s title is sent to our service only when the article matches a tracked event and alerts are enabled, or when you open the popup to request an analysis; in silent mode nothing is sent until you open the popup. Your extension settings are stored with Chrome’s own sync storage, not on our servers.

What is never collected

• No browsing history, and nothing from non-Wikipedia pages.
• No accounts, sign-ins, or tracking cookies; no advertising. Traffic is measured with Vercel Web Analytics and Speed Insights — cookieless, aggregate page views, referrers, and page-load timings, with no personal identifiers and no cross-site tracking.
• No personal information beyond the transient IP handling described below. Analyses are keyed by article and event, never by person.
• No editor profiling: the service computes aggregate editor statistics only and never returns, stores, or displays usernames from revision metadata.

What is stored server-side

Analysis results (public Wikipedia data only) are cached for up to a week to keep the service fast and cheap. The application keeps no logs of IP addresses; rate limiting uses short-lived, salted-hash counters that never contain a raw address and expire automatically within minutes. This transient handling exists solely to prevent abuse of a free service (our legitimate interest). Platform-level logs follow Vercel’s standard operational retention.

Your rights

The service holds no data keyed to your identity — no accounts, profiles, or identifiers — so there is generally nothing for us to access, correct, or delete. If you are in the EU, UK, or a jurisdiction with data-protection rights and believe we hold personal data about you, contact us below and we will respond.

Model calls

When you explicitly request a comparison, the changed article excerpts are sent to a language model through the Vercel AI Gateway solely to generate the summary. No identity accompanies the request, and the model has no tools or web access.

Wikipedia content

Article excerpts shown in comparisons are © their Wikipedia contributors, reused under CC BY-SA 4.0 with attribution via links to the exact revision IDs and official diffs.

Contact

Questions: github.com/cheesejaguar/historyrewritten.org.