SEO & Performance
Resource Size Calculator
Paste the files your page loads to total their transfer size and see the breakdown by JavaScript, CSS, images, fonts and everything else. Runs entirely in your browser.
Your resources
one per line
Write each resource as name size — for example
app.js 245 KB. The category is detected from the file extension,
so hero.webp counts as an image and app.js as
JavaScript. Start a line with a category (css, font,
other) to override it, and use # to add comments.
Breakdown
liveTotal transfer size
All resources
0 parsedNo resources yet
Paste a list above to see every resource, its category and its share of the total.
| Resource | Category | Size | Share |
|---|
How it works
Each line is read as a resource name followed by a size. Sizes accept
B, KB, MB, GB and
TB, with or without a space. Grouping commas such as
1,024 are allowed, and a line may also be just a size. Categories are
inferred from the file extension; unrecognised extensions fall under
Other. Lines that cannot be read are listed with a friendly
explanation instead of being silently dropped, and everything stays on this page.