Keep a log of what you changed on which page, drop in your Search Console exports, and every change lines up with the same number of days on each side, with a flag when two changes to one page are dated close together.
Before and after figures are not proof of cause. Algorithm updates, seasonality, competitors, tracking changes and other edits can all move these numbers. This tool lines up dates; it does not say what any change did.
Your files are read inside your browser. Nothing is uploaded.
Type changes as you make them or import a CSV. Search Console exports one page filter at a time, so drop one Dates download per page, or one file with a date and a page column from Looker Studio or the API. Columns are matched by name on upload, and you can pick a different column if a name differs.
The change day sits in neither window. When a page's data runs out on one side, both sides shrink to the same number of days, and the page says so.
CTR comes from each window's summed clicks and impressions. Average position is weighted by impressions. A dash means there is nothing to divide by.
Two changes overlap when they are on the same page and dated at most the window apart. The rule is printed next to the table.
Search Console labels each day in Pacific Time. Your change dates are read exactly as you typed them, and nothing is converted.
Built by Mulkern AI Systems. A date-alignment tool for your own site data, nothing more.
Search Console data for the most recent 2 to 3 days is usually incomplete.
A day with no row in your files counts as zero, and the page tells you how many there were. Run PPC too? The Ads Change Before/After Log does the same for Google Ads change history.
Pay once, keep it. Runs offline once installed, on desktop or phone. No account, no sign-in, no upload.
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