Chrome Extension · v3.0

Measure what Google measures.
Without leaving the tab.

Core Web Vitals, technical SEO, accessibility, DNS and tech-stack — audited locally, in real time, with CrUX field data.

Add to Chrome → See what it does

// Open source · Apache-2.0 · Fully local · Zero telemetry

Live audit
97 PERFORMANCE
LCP
1.2s
CLS
0.02
INP
84ms
6 diagnostic panels
0 data sent to servers
APIs public: CrUX · DNS · RDAP
MV3 · Side panel · Chrome 114+
New in v3.0

Stop checking meta tags. Audit how Google sees you.

The SEO panel went from reading tags to auditing real indexation: robots, sitemap, redirects and structure.

01

Indexability verdict

Cross-checks three signals — meta robots, the X-Robots-Tag header and robots.txt — into a single clear diagnosis.

Indexable · Blocked
02

robots.txt + sitemap

Reads the real robots.txt, evaluates whether your URL is blocked, locates the sitemap and tells an index from a regular one.

/robots.txt · /sitemap.xml
03

HTTP status + redirects

Response code (200/301/404) and the full redirect chain, so you catch loops and unexpected hops.

301 → 200
04

hreflang

Detects rel="alternate" hreflang tags and warns when x-default is missing on multi-language sites.

i18n
05

Heading outline

H1–H6 in document order, with detection of level jumps that break structure and accessibility.

H2 → H4 ⚠
06

Core Web Vitals

LCP, CLS, INP, FCP and TTFB measured locally and compared against CrUX field data. The heart of it all.

Field + Lab
How it works

All in your browser. Nothing in the cloud.

Local measurement

Metrics are collected with Google's web-vitals library right on the page. No middle server.

Public APIs

For field data, DNS or domain registration it queries open APIs (CrUX, Google DNS, RDAP). Nothing of yours is stored.

Zero telemetry

The extension sends none of your activity anywhere. The CSP is restricted to the strictly necessary origins.