SEO Audit

On-page SEO audit: fetch a URL server-side and score it with per-check fixes.

A free on-page SEO site checker. Enter a URL and Zapbox fetches the page server-side, parses the HTML, and checks the title & meta description (and their length), H1 & heading structure, canonical, meta robots, Open Graph & Twitter cards, JSON-LD structured data, image alt text, viewport, charset, lang, word count, internal/external links, HTTPS, and robots.txt / Sitemap — then gives a 0–100 score with a fix suggestion per check. Public URLs only.

How to use

1. Paste the URL to check (https:// is optional).
2. Click Scan — the server fetches and analyzes the page.
3. Read the overall score and the per-check results grouped into Meta / Headings / Social / Structured data / Content / Technical.
4. For items flagged warn or fail, apply the suggested fix.

FAQ

Why fetch server-side instead of in the browser?

Browsers cannot read another site’s HTML due to the same-origin policy (CORS). Fetching from the Zapbox server is the only way to get the full page to analyze; the page is used and discarded, not stored.

Does it include performance (Lighthouse), broken links, or ranking?

This is an on-page audit focused on the page’s SEO elements. Lighthouse performance, broken-link crawling and SERP ranking are heavier deep-scan features and are not included yet.

Can it scan internal or local addresses?

No. For safety (SSRF protection), URLs that resolve to private, loopback or other non-public addresses are rejected.

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