Technical Diff Watcher

Compare a live page with its closest Wayback Machine snapshot. See changes to status, title, description, canonical, robots, headings, content length, links, structured data, hreflang and language, ranked by severity.

YYYYMMDD. We use the closest snapshot to that date. Leave empty for about 3 months ago.

How to use the Technical Diff Watcher

  1. 1

    Enter the page URL, and optionally the date before a traffic drop.

  2. 2

    Click Compare with archive. We fetch the closest Wayback Machine snapshot and the live page.

  3. 3

    Review high-severity changes first, such as a new noindex, a changed canonical or removed content.

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Frequently asked questions

Where does the old version come from?

From the Internet Archive's Wayback Machine, which stores copies of public pages. Popular pages have many snapshots; small sites may have few or none.

Why would I compare with an old version?

When traffic drops, a template change, a new noindex or canonical, or removed content is often the cause. This shows what changed.

Why do some changes look minor?

Small differences in word or link counts are normal (dates, menus, comments). We only flag changes above a threshold.

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