Page Size Checker
Check web page size
Page Size Checker
The page size checker measures the total byte weight of any public URL — counting every HTML document, stylesheet, script, and image the browser must download. Knowing your page's true size lets you pinpoint performance bottlenecks before they hurt your rankings or user experience.
Benefits of the page size checker
- Get an instant, accurate reading of total page weight in KB or MB without installing any browser extension.
- Identify oversized resources — large uncompressed images, heavy JavaScript bundles — that inflate load time.
- Support Core Web Vitals improvements by targeting the assets that contribute most to LCP and FID delays.
- Track page size changes over time to measure the real impact of your optimization efforts.
- Completely free, with no sign-up or account required.
Use cases for checking webpage size
- Front-end developers verifying that a new build hasn't introduced unexpected asset bloat before deployment.
- SEO specialists confirming that landing pages stay within Google's recommended weight thresholds for fast indexing.
- Site owners monitoring how page size grows as new content, plugins, or third-party scripts are added.
- QA teams comparing page weights between staging and production environments prior to a release.
- Digital marketers auditing paid ad landing pages to reduce bounce rates on mobile connections.
- Web performance students learning how individual resource types contribute to overall page weight.
How to use the page size checker
- Paste the complete URL of the page you want to measure (e.g., https://example.com/product-page) into the input field.
- Click the Check button and wait a moment while the tool fetches the page resources.
- Review the results showing total page size in KB/MB along with a breakdown by resource type.
- Compare against the recommended threshold — typically under 500 KB for a well-optimized page — and prioritize which assets to compress or defer.
Frequently asked questions
What is a good page size? Google recommends keeping total page weight under 500 KB for fast load times, especially on mobile networks. E-commerce pages can run larger but should ideally stay below 2 MB.
How does this tool calculate page size? It sends an HTTP request to the URL you provide, measures the raw bytes of the HTML response along with all referenced resources, and returns the combined total.
Will the result match what I see in browser DevTools? Minor differences can occur due to browser caching, gzip compression, or conditionally loaded assets. Use both tools together for the most complete picture.
Can I check pages that require a login? No — the tool can only access publicly available URLs. For password-protected pages, use the Network panel in your browser's DevTools directly.