How to use Website Bandwidth Checker
- Generate a Lighthouse/PageSpeed JSON report and paste it into Website Bandwidth Checker.
- Website Bandwidth Checker shows the page's transfer sizes, resource breakdown and gzip/Brotli savings from the report.
- Use the figures to find oversized resources and missing compression — nothing is uploaded.
About this tool
Website Bandwidth Checker is a static, client-side tool with no backend. Website Bandwidth Checker parses an exported Lighthouse/PageSpeed report locally and pulls out page weight, per-type transfer sizes and compression savings.
Everything is parsed on your device; nothing you load is uploaded. It behaves the same on desktop and mobile, with nothing stored remotely.
Frequently asked questions
What is Website Bandwidth Checker for?
Use Website Bandwidth Checker to check your input without installing anything; everything happens client-side.
Is Website Bandwidth Checker free to use?
Yes — Website Bandwidth Checker is completely free, with no usage limits.
Does Website Bandwidth Checker upload my data?
No — Website Bandwidth Checker processes everything locally in your browser, so nothing you enter is uploaded or stored.
How does Website Bandwidth Checker measure size and compression?
Website Bandwidth Checker reads the resource-summary, total-byte-weight and uses-text-compression audits from a Lighthouse or PageSpeed JSON report you paste, then shows transfer sizes and gzip/Brotli savings — all parsed locally.
Can I use Website Bandwidth Checker without a connection?
Yes — after the first load Website Bandwidth Checker runs entirely offline.