Natiad

Free Website Page Size Checker

Check page size and see how big a webpage is in KB or MB. This free web page size checker measures HTML, CSS, JavaScript, images, and fonts—no account required.

Enter any public page URL to check web page size and download weight.

Why use a free website page size checker?

Web page size is the total download weight of a page—HTML plus CSS, JavaScript, images, and fonts. Search engines and users both favor fast pages. This free web page size checker shows how big is my website (or any URL) so you can check page size before it hurts rankings or conversions.

Industry guidance suggests keeping webpage size under 3 MB. Above that, load times climb and bounce rates often follow. Use this website size checker after launches, template changes, or when you need to check website size on competitor pages.

How to check page size on a website

  1. Enter your page URL

    Paste any public URL—homepage, blog post, or landing page. The website page size checker works on live pages without installing an extension.

  2. Click Check page size

    We fetch the HTML document and measure linked CSS, JavaScript, images, and fonts to calculate total web page size and resource breakdown.

  3. Review size and optimize

    See how big your website page is in KB or MB, compare against the 3 MB SEO guideline, and use the resource list to decide what to compress, defer, or remove.

Use cases

  • SEO performance audits

    Use this free web page size checker to measure webpage size before publishing. Pages over 3 MB often load slowly, hurting Core Web Vitals, bounce rate, and Google rankings.

  • Find heavy resources

    See a breakdown of HTML, CSS, JavaScript, images, and fonts contributing to website page size. Spot oversized assets and prioritize compression or lazy-loading fixes.

  • Homepage and landing page checks

    Check website size on your homepage or key landing pages after a redesign. Compare web page sizes across templates to keep website layout size consistent and fast.

  • GEO and AI-readable page weight

    Lean pages load faster for users and crawlers—including AI bots that fetch public URLs. A website size checker helps you keep pages efficient so content stays discoverable in search and generative answers.

Page size checker for SEO and GEO

Page weight affects Core Web Vitals, crawl efficiency, and user experience—foundational for SEO. For generative engine optimization (GEO), lean pages help AI crawlers fetch and parse your content quickly, improving the chance your pages appear in AI-generated answers.

Natiad automates ongoing SEO and GEO beyond one-off size checks—topical roadmaps, optimized drafts, internal links, and review-before-publish across your content calendar.

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Website page size checker FAQ

What does this page size checker measure?
It measures the download size of a web page: the HTML document plus linked stylesheets, scripts, images, and fonts discovered in the page source. Total webpage size is the sum of those resources.
What is a good website page size for SEO?
Aim to keep total page weight under 3 MB. Smaller web page sizes load faster, improve user experience, and support better rankings. Use this website size checker regularly after content or design changes.
Is this web page size checker free?
Yes. Natiad's free page size checker requires no signup or credits. Check page size on any public URL as often as you need for audits and client reports.
How is this different from checking viewport dimensions?
Website dimensions in layout tools refer to screen width and height. This tool answers how big is my website in terms of file weight—the bytes downloaded when someone opens the page.
Does it measure every resource on the page?
It scans resources referenced in the initial HTML (up to a safe limit within a time budget). Dynamically loaded assets via JavaScript may not appear. For those, use browser DevTools or full performance monitoring.
Why does my page size differ from Google PageSpeed?
Google PageSpeed and Lighthouse run a full browser simulation with caching rules and third-party requests. This page size checker gives a quick, server-side estimate of document and linked asset weight—ideal for fast checks without a lab test.
Can I check competitor website size?
Yes. Enter any public URL to check website size and compare web page sizes across competitors. Use the breakdown to see whether images, scripts, or CSS drive their total page weight.