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ssrClassic tool

SSR Checker

Compare the no-JavaScript version and the JavaScript-enabled version of a URL side by side to inspect the initial HTML.

Use this SSR Checker to inspect a public URL and compare what arrives in the initial HTML with what only appears after scripts run. It works well for SEO audits, technical debugging, QA, editorial review and pages that mix SSR, hydration and client-side behavior.

The tool fetches the page server-side, measures signals such as title, meta description, canonical, H1, visible source text, JSON-LD and script volume, then returns a practical score-based diagnosis. The focus stays on what visitors, monitors and crawlers receive in the first HTML response.

The comparison is now more direct: one panel shows the no-JavaScript version and the other tries to load the JavaScript-enabled version inside a sandbox. That makes it easier to spot empty app shells, content that disappears without hydration and interactions that only exist when scripts can run.

Use public pages. The checker blocks local hosts and non-default ports to avoid abuse and false diagnostics.

SummaryEnter a public URL to analyze the initial HTML.
Verdict—
Status and content type—
Final URL—
TitleNo title detected
Meta descriptionNo meta description detected
CanonicalNo canonical detected
Main H1No H1 detected
Metrics—
Checks
—
No-JavaScript preview × JavaScript preview
No-JavaScript preview

This panel removes scripts to show the initial HTML with minimal browser interference.

JavaScript preview

This panel tries to run scripts inside a sandbox. Some pages may still fail if they depend on login, storage, service workers or browser permissions.

Use clear inputs to get a more useful result.