Useful Commons

Free browser tool

Check source freshness

Paste your source register and the claims that cite it. Publication date, last fetch and last content review stay separate, so a successful download never makes a source verified.

Runs on this device. No upload, account or tracking; nothing is scheduled or applied.

Your sources and claims

The date the statuses are calculated for. The tool never reads your clock.

A JSON file; it fills the source records box
    Empty

    Each source: id, title, kind, publisher_date with publisher_date_basis, last_fetch {date, outcome}, last_semantic_review {date, reviewer_id, scope, valid_until}, rights and status. Try the sample.

    Empty

    [{"id", "text_ref", "source_ids": [...], "definitive": true, "scope": {...}}]

    Review policy optional

    Empty

    {"default_review_days": 90, "default_check_days": 7, "classes": {"high_change": {"review_days": 14, "required_evidence": ["reviewer", "scope"]}}}

    Empty

    [{"id", "name", "available": true}]

    Up to 5,000 sources and 10,000 claims. URLs are text only and are never fetched. Unknown dates stay unknown.

    About this tool

    What this tool does

    Find which cited sources are fresh, stale or unknown, which claims they still support, and what to review next, without fetching anything.

    Limits and safe use

    Up to 5,000 sources and 10,000 claims. URLs are text only and are never fetched. Unknown dates stay unknown. Review the report before relying on it. It is a deterministic check, not a certification, and it does not send data to a server or a model.