Lighthouse Viewer

Run Google PageSpeed Insights and audit any URL

Run a full Google PageSpeed Insights audit on any public URL and get the same Lighthouse scores Google itself uses to evaluate your site — Performance, Accessibility, Best Practices and SEO. Drill into Core Web Vitals (LCP, INP, CLS), opportunities, diagnostics and passed audits in a clean, developer‑friendly interface.

Page speed is a confirmed Google ranking factor and a massive driver of conversion rates. Lighthouse and Core Web Vitals form the de facto standard for measuring performance, but the official Google interface can be slow and cluttered. ToolsGuru's Lighthouse Viewer streams the same data through a cleaner UI for faster audits and better readability.

Use it to audit your own pages before launch, benchmark competitors, monitor SEO progress, or just check why a slow site feels slow. Mobile and desktop strategies are both supported, since the two often produce dramatically different results.

Why use Lighthouse Viewer?

Real Google data

Core Web Vitals included

LCP, INP and CLS displayed prominently with thresholds.

Mobile + desktop

Run audits for either strategy with one click.

Faster than the official UI

Lighter, cleaner interface optimized for repeated audits.

How to use Lighthouse Viewer

1
Paste a URL
Drop in any public web address.
2
Pick mobile or desktop
Choose the device strategy you want to audit.
3
Run the audit
Click Run — results stream in within seconds.
4
Review opportunities
Drill into specific recommendations and the audits behind them.

Common use cases

Pre‑launch audit

Check Core Web Vitals before pushing a new site live.

Competitor benchmarking

Audit competitors to find performance gaps to exploit.

SEO monitoring

Track Performance and SEO scores over time as you ship optimizations.

Bug triage

Quickly identify whether reported slowness is real and where it originates.

Features at a glance

Official PageSpeed Insights API
Performance, Accessibility, Best Practices, SEO scores
Core Web Vitals: LCP, INP, CLS
Mobile and desktop modes
Detailed opportunities and diagnostics
Cached results for repeat audits
Clean, distraction‑free UI
Works on any public URL

Frequently asked questions

How do I run a Lighthouse audit online?

Enter your website URL in the Lighthouse Viewer and click Run Audit. Results show performance, accessibility, SEO, and best practices scores with actionable recommendations.

What is a good Google Lighthouse performance score?

Scores of 90–100 are considered good (green), 50–89 need improvement (orange), and below 50 are poor (red). Aim for 90+ for optimal search ranking.

Does Lighthouse Viewer check Core Web Vitals?

Yes. The audit includes LCP (Largest Contentful Paint), CLS (Cumulative Layout Shift), and FID/INP (Interaction metrics) — the three Core Web Vitals Google uses for ranking.

Can I check multiple pages with the Lighthouse Viewer?

You can run audits on any URL sequentially. Enter a new URL and run another audit to compare results across different pages of your site.

Your privacy matters

Lighthouse Viewer runs entirely in your web browser. Your files, text, and data are never uploaded to any server, never stored, and never seen by us or any third party. This client-side architecture means you can safely process confidential business documents, personal records, and proprietary data without privacy concerns.