What you’ll need
Before and after CSV: url plus any shared status, title, description, h1, canonical or robots fields. Optional old_url,new_url map and source,target link exports.
SEO TOOL · FREE TO USE
SEO Before & After Checker
Compare two crawl snapshots, account for planned URL moves, and review changes in metadata, directives and links.
Runs on your device · Files stay private01Your workspace
- 1 Add your input
- 2 Run the tool
- 3 Get your results
Before and after CSV: url plus any shared status, title, description, h1, canonical or robots fields. Optional old_url,new_url map and source,target link exports. New here? Start with “Try an example”.
Or paste your data below. You can edit it before running the tool.
Or paste your data below. You can edit it before running the tool.
URL moves & internal links (optional)
Or paste your data below. You can edit it before running the tool.
Or paste your data below. You can edit it before running the tool.
Or paste your data below. You can edit it before running the tool.
Your files stay on this device. No sign-up.
How it works
Exact URL joins or explicit move mappings compare shared fields. Link sets are compared independently. Missing coverage is separated from confirmed changes.
Know the limits
10,000 page rows per snapshot; 50,000 link rows. Supplied snapshots only: no live crawl, ranking-loss diagnosis or Google-selected canonical.
GET FROM A QUESTION TO A NEXT STEP
Catch unintended SEO changes after a release
A redesign may improve the page visually while quietly changing a canonical, dropping a title or adding noindex. This SEO change checker compares two supplied crawl snapshots so you can review those changes explicitly. It is useful for release QA and migrations where some URLs are expected to move. Declared moves are compared as planned mappings instead of being mistaken for unrelated removals and additions.
How to use SEO Before & After Checker
Export before and after crawl CSVs with a URL column and the shared SEO fields you want to compare. Keep the crawl scope as consistent as possible.
Add an old-to-new URL map for planned moves, and supply link exports if you need to compare internal-link relationships.
Run the comparison and prioritize unexpected directive, canonical, status and metadata changes. Keep the original snapshots with the report for investigation.
What do the results mean?
Missing rows can reflect crawl coverage rather than deleted pages. A changed field is evidence of a change, not proof of ranking impact. Only shared supplied fields can be compared, and the tool cannot reconstruct values that were absent in one snapshot.
What to do next
Confirm high-priority findings on live pages with Fetch & Render, then rerun the comparison after a release fix.
Keep the scope in mind
10,000 page rows per snapshot; 50,000 link rows. Supplied snapshots only: no live crawl, ranking-loss diagnosis or Google-selected canonical.
Common questions about SEO Before & After Checker
Can this tell me why rankings dropped?
It can identify changes in supplied crawl evidence, but it cannot establish a ranking-loss cause. Combine the report with live checks, Search Console evidence and your release history.
Why should I supply a URL move map?
A known old-to-new mapping lets the tool compare corresponding pages. Without it, the old URL and new URL can appear as separate coverage changes rather than a planned migration pair.