HAR Network & Performance Analyzer
Web & network Local only
Web Performance & Core Web Vitals Analyzer
Local evidence analysisAnalyze and compare Lighthouse, Web Vitals and HAR data with explicit budgets and local reports.
—Performance score
0Available metrics
0Requests
0Regressions
0Failed budgets
Measurement sources are not interchangeable
Lab data is reproducible diagnostic evidence. Lighthouse does not directly measure INP; TBT remains a separate lab metric.
Resource weight
How to use it
- 01
Import measured evidence
Open bounded Lighthouse, Web Vitals or HAR files and keep lab, field and network sources clearly labelled.
- 02
Compare and enforce budgets
Review metric grades, baseline deltas, resource totals and configurable metric, byte and request thresholds.
- 03
Prioritize and report
Inspect only evidence present in the source and export JSON, Markdown, CSV, Lighthouse budgets or CI assertions.
Frequently asked questions
Does this page run Lighthouse on a URL?
No. It analyzes reports you provide locally and does not claim an import was an active test.
Why is INP missing from some Lighthouse files?
INP needs real interaction data. Lighthouse can expose lab diagnostics such as TBT, but the tool does not relabel TBT as INP.
What are the current Core Web Vitals?
LCP, INP and CLS cover loading, responsiveness and visual stability. Field status is normally assessed at the 75th percentile.
Do optimization estimates guarantee savings or rankings?
No. Imported estimates are diagnostic evidence and results vary by implementation, traffic, device and measurement method.
Related tools
Keep working with other focused browser utilities.