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Discover Sources Larger Than 15 MB For Higher Googlebot Crawling

Googlebot is an automated and always-on internet crawling system that retains Google’s index refreshed.

The web site estimates Google’s index to be greater than 62 billion internet pages.

Google’s search index is “effectively over 100,000,000 gigabytes in dimension.”

Googlebot and variants (smartphones, information, photos, and so forth.) have sure constraints for the frequency of JavaScript rendering or the scale of the assets.

Google makes use of crawling constraints to guard its personal crawling assets and techniques.

As an example, if a information web site refreshes the beneficial articles each 15 seconds, Googlebot would possibly begin to skip the ceaselessly refreshed sections – since they gained’t be related or legitimate after 15 seconds.

Years in the past, Google introduced that it doesn’t crawl or use assets greater than 15 MB.

On June 28, 2022, Google republished this weblog publish by stating that it doesn’t use the surplus a part of the assets after 15 MB for crawling.

To emphasise that it not often occurs, Google acknowledged that the “median dimension of an HTML file is 500 occasions smaller” than 15 MB.

timeline of html bytesScreenshot from the writer, August 2022

Above, reveals the median desktop and cell HTML file dimension. Thus, most web sites should not have the issue of the 15 MB constraint for crawling.

However, the net is a giant and chaotic place.

Understanding the character of the 15 MB crawling restrict and methods to research it is necessary for SEOs.

A picture, video, or bug could cause crawling issues, and this lesser-known search engine marketing info will help tasks shield their natural search worth.

Find Resources Bigger Than 15 MB For Better Googlebot Crawling

Is 15 MB Googlebot Crawling Restrict Solely For HTML Paperwork?


15 MB Googlebot crawling restrict is for all indexable and crawlable paperwork, together with Google Earth, Hancom Hanword (.hwp), OpenOffice textual content (.odt), and Wealthy Textual content Format (.rtf), or different Googlebot-supported file sorts.

Are Picture And Video Sizes Summed With HTML Doc?

No, each useful resource is evaluated individually by the 15 MB crawling restrict.

If the HTML doc is 14.99 MB, and the featured picture of the HTML doc is 14.99 MB once more, they each will likely be crawled and utilized by Googlebot.

The HTML doc’s dimension is just not summed with the assets which might be linked through HTML tags.

Does Inlined CSS, JS, Or Information URI Bloat HTML Doc Dimension?

Sure, inlined CSS, JS, or the Information URI are counted and used within the HTML doc dimension.

Thus, if the doc exceeds 15 MB attributable to inlined assets and instructions, it should have an effect on the particular HTML doc’s crawlability.

Does Google Cease Crawling The Useful resource If It Is Larger Than 15 MB?

No, Google crawling techniques don’t cease crawling the assets which might be greater than the 15 MB restrict.

They proceed to fetch the file and use solely the smaller half than the 15 MB.

For a picture greater than 15 MB, Googlebot can chunk the picture till the 15 MB with the assistance of “content material vary.”

The Content material-Vary is a response header that helps Googlebot or different crawlers and requesters carry out partial requests.

How To Audit The Useful resource Dimension Manually?

You should use Google Chrome Developer Instruments to audit the useful resource dimension manually.

Comply with the steps under on Google Chrome.

  • Open an internet web page doc through Google Chrome.
  • Press F12.
  • Go to the Community tab.
  • Refresh the net web page.
  • Order the assets in line with the Waterfall.
  • Test the dimension column on the primary row, which reveals the HTML doc’s dimension.

Beneath, you’ll be able to see an instance of a homepage HTML doc, which is greater than 77 KB.

search engine journal homepage html resultsScreenshot by writer, August 2022

How To Audit The Useful resource Dimension Robotically And Bulk?

Use Python to audit the HTML doc dimension mechanically and in bulk. Advertools and Pandas are two helpful Python Libraries to automate and scale search engine marketing duties.

Comply with the directions under.

  • Import Advertools and Pandas.
  • Acquire all of the URLs within the sitemap.
  • Crawl all of the URLs within the sitemap.
  • Filter the URLs with their HTML Dimension.
import advertools as adv

import pandas as pd

df = adv.sitemap_to_df("")

adv.crawl(df["loc"], output_file="output.jl", custom_settings={"LOG_FILE":"output_1.log"})

df = pd.read_json("output.jl", strains=True)

df[["url", "size"]].sort_values(by="dimension", ascending=False)

The code block above extracts the sitemap URLs and crawls them.

The final line of the code is just for creating an information body with a descending order based mostly on the sizes. urls and sizePicture created by writer, August 2022

You’ll be able to see the sizes of HTML paperwork as above.

The most important HTML doc on this instance is round 700 KB, which is a class web page.

So, this web site is protected for 15 MB constraints. However, we will examine past this.

How To Test The Sizes of CSS And JS Sources?

Puppeteer is used to examine the scale of CSS and JS Sources.

Puppeteer is a NodeJS package deal to manage Google Chrome with headless mode for browser automation and web site assessments.

Most search engine marketing professionals use Lighthouse or Web page Pace Insights API for his or her efficiency assessments. However, with the assistance of Puppeteer, each technical side and simulation may be analyzed.

Comply with the code block under.

const puppeteer = require('puppeteer');

const XLSX = require("xlsx");

const path = require("path");

(async () => {

    const browser = await puppeteer.launch({

        headless: false


    const web page = await browser.newPage();

    await web page.goto('');

    console.log('Web page loaded');

    const perfEntries = JSON.parse(

        await web page.consider(() => JSON.stringify(efficiency.getEntries()))





      const workSheetColumnName = [






          const urlObject = new URL("")

          const hostName = urlObject.hostname

          const domainName ="www.|.com", "");



          const workSheetName = "Customers";

          const filePath = `./${domainName}`;

          const userList = perfEntries;



          const exportPerfToExcel = (userList) => {

              const knowledge = => {

                  return [, url.transferSize, url.encodedBodySize, url. decodedBodySize];


              const workBook = XLSX.utils.book_new();

              const workSheetData = [




              const workSheet = XLSX.utils.aoa_to_sheet(workSheetData);

              XLSX.utils.book_append_sheet(workBook, workSheet, workSheetName);

              XLSX.writeFile(workBook, path.resolve(filePath));

              return true;








Should you have no idea JavaScript or didn’t end any type of Puppeteer tutorial, it is likely to be somewhat more durable so that you can perceive these code blocks. However, it’s truly easy.

It mainly opens a URL, takes all of the assets, and provides their “transferSize”, “encodedSize”, and “decodedSize.”

On this instance, “decodedSize” is the scale that we have to deal with. Beneath, you’ll be able to see the outcome within the type of an XLS file.

Resource SizesByte sizes of the assets from the web site.

If you wish to automate these processes for each URL once more, you have to to make use of a for loop within the “await.web page.goto()” command.

Based on your preferences, you’ll be able to put each internet web page into a special worksheet or connect it to the identical worksheet by appending it.


The 15 MB of Googlebot crawling constraint is a uncommon risk that can block your technical search engine marketing processes for now, however reveals that the median video, picture, and JavaScript sizes have elevated in the previous couple of years.

The median picture dimension on the desktop has exceeded 1 MB.

Timeseries of Image BytesScreenshot by writer, August 2022

The video bytes exceed 5 MB in complete.

Timeseries of video bytesScreenshot by writer, August 2022

In different phrases, once in a while, these assets – or some components of those assets – is likely to be skipped by Googlebot.

Thus, it’s best to be capable to management them mechanically, with bulk strategies to make time and never skip.

Extra assets:

Featured Picture: BestForBest/Shutterstock



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