URL Watch
Diffs & crawl history
Read what changed between two crawls of a watched URL, including the added and removed content, and work through the recorded crawl history.
Open any watch to see its crawl history — one entry per crawl attempt, newest first — and the diff for each crawl that changed.
What a crawl records
Every crawl attempt produces a history entry, whether or not the page changed:
- Changed — the entry carries a diff of inserted and removed content versus the previous snapshot.
- No change — recorded with an empty diff, so you can see the page was checked and was stable.
- First crawl — establishes the baseline snapshot; there's nothing to diff against yet.
- Error — the page couldn't be fetched or rendered; the entry notes the error.
Reading a diff
A diff is a set of chunks marking text that was added or removed since the last crawl. The detail view renders these inline so you can scan what changed at a glance and open the rendered page snapshot itself.
Next steps
Quotas & limits
How checks are counted and how to make your quota last.
Stream overview
Watch the whole web for a pattern instead of a fixed URL list.