Performance Analyzer for Chrome
Measures real-time Core Web Vitals (LCP, CLS, INP, FCP, TTFB), resource weight breakdown, and DOM complexity.
Replaces:
Web VitalsPerformance Analyzer
Why Developers Switch to OmniDev
Installing a separate browser extension just for performance analyzer bloats Chrome memory, adds permission risk, and clutters your toolbar. OmniDev integrates Performance Analyzer natively alongside 53 other frontend and QA tools.
Measures real-time Core Web Vitals (LCP, CLS, INP, FCP, TTFB), resource weight breakdown, and DOM complexity.
Runs inside an isolated Shadow DOM panel so host page styles never break or leak
Zero background RAM overhead when idle — lazy-loaded on demand in milliseconds
Replaces standalone Web Vitals, Performance Analyzer extensions inside a single 54-in-1 toolkit
Shadow-DOM isolated • Zero host-page CSS leakage
STEP 01
Install OmniDev from the Chrome Web Store and open the popup or press your custom shortcut.
STEP 02
Select "Performance Analyzer" under the Analytics category (or search "Performance Analyzer" in the launcher).
STEP 03
Inspect, capture, or export results directly on the live page — 100% locally in your browser.
See How OmniDev Compares
Detailed side-by-side comparisons against standalone Chrome extensions:
Frequently Asked Questions — Performance Analyzer
Is the Performance Analyzer tool in OmniDev completely free?
Yes. Performance Analyzer and all 54 tools in OmniDev are 100% free to use with no account signup or paywall.
Does Performance Analyzer send my webpage data to an external server?
No. Performance Analyzer runs locally inside your browser tab. OmniDev is architected local-first and never uploads your DOM, storage, or network payloads to a Jambo backend.
Which standalone Chrome extensions does Performance Analyzer replace?
Performance Analyzer replaces single-purpose extensions such as Web Vitals, Performance Analyzer, saving browser RAM and reducing extension permission sprawl.
More Analytics Tools in OmniDev
Every tool below is included in the same single Chrome extension install.
Explore All 54 Tools
SEO Checker
Audits on-page SEO health: title/description length, canonical tags, robots directives, heading hierarchy (H1–H6), and missing alt attributes.
Storage Inspector
Unified browser storage explorer to inspect, search, edit, and clear localStorage, sessionStorage, and cookies.
Tech Stack Analyzer
Detects frontend frameworks (React, Next.js, Vue, Nuxt, Svelte, Astro), UI libraries, analytics, CDNs, and server headers locally.
Accessibility Checker (a11y)
Runs an instant WCAG accessibility audit checking color contrast ratios, ARIA roles, form labels, landmarks, and missing alt text.
Design Drift Inspector
Audits the live DOM against your design system tokens to catch off-palette colors, rogue font sizes, and non-standard spacing values.
Link Checker
Scans all internal and external anchor links on the current page to highlight broken 404 URLs, redirects, and insecure links.
Get Performance Analyzer + 53 More Tools in 1 Click
Stop cluttering Chrome with dozens of single-purpose extensions. Install OmniDev free and run everything locally.
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