Webpage File Size Checker
Total download size of the rendered page, broken down by resource type.
Runs a real Chromium page load — usually takes 5–15 seconds.
What this tool checks
Total page weight
Lab measurement of the total bytes transferred to load the page.
Why it matters: Heavy pages are slow on mobile networks and cost users data. Around 1.5–2 MB is a common budget; well over that is worth reviewing.
If it fails: Compress and right-size images, remove unused JS/CSS, lazy-load offscreen media, and audit third-party scripts.
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- Inline CSS CheckerCounts elements using a style="" attribute instead of a stylesheet.
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- Webpage JavaScript Error CheckerLoads the page in a real browser and reports any JavaScript errors thrown.