Validate website migrations with confidence
Compare any two versions of a website — visual diffs, content analysis, and status checks — in minutes.
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Everything you need to validate a migration
From visual regression testing to content comparison, diff.site covers all the bases.
Visual Comparison
Pixel-level screenshot comparison highlights every visual difference between your environments.
Content Analysis
Word-level similarity scoring detects missing text, broken translations, and content drift.
Status Checks
Verify HTTP status codes match across environments — catch 404s, redirects, and server errors.
DNS Override
Test a new server IP with the same domain — no hosts file changes needed.
Automatic Crawling
Discover pages automatically from the homepage. No URL list required.
Detailed Reports
Side-by-side diffs, similarity scores, and drill-down per page for fast review.
Project Organization
Group your sites by client or project. Each project is isolated, ready for multi-client workflows.
Result Sharing
Share comparison reports via a unique link. Perfect for client validation or team review.
BYODB / BYOS Coming soon
Connect your own database and storage. Keep full control of your data on your own infrastructure.
How it works
Add your site
Enter the URL and configure your environments (production, staging, new IP...).
Crawl & capture
The crawler discovers pages and captures screenshots, content, and HTTP status for each.
Compare
Run the same tests on the target environment and get a full comparison report.
Review & ship
Review visual diffs, content changes, and status mismatches. Ship with confidence.
A complete REST API for developers
Integrate diff.site 100% into your workflow. Automate captures, comparisons, and retrieve all results via API.
Launch captures
Trigger crawl and screenshots with a simple POST call. Perfect for your CI/CD pipelines.
Compare in JSON
Get similarity scores, HTTP statuses, and diff paths in structured JSON responses.
Retrieve screenshots
Access captures and diff images via direct URLs. Private and secure storage.
100% private
Your API key, your data. No third-party access. BYODB compatible for full control.
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