If Google PageSpeed Insights is showing the “Avoid enormous network payloads” warning, your WordPress website is sending too much data to the visitor’s browser.
A large page can take longer to download, use more mobile data, and make the website feel slower—especially on a mobile connection.
The good news is that you usually don’t need to rebuild your website to fix it.
You can reduce the amount of data your pages send by optimizing images, removing unnecessary files, reducing JavaScript and CSS, improving fonts, and controlling third-party content.
This guide explains how to reduce large network payloads in WordPress without sacrificing the parts of your website that visitors actually need.
What Is an Enormous Network Payload?
A network payload is the total amount of data a browser needs to download while loading a webpage.
This can include:
- HTML
- CSS
- JavaScript
- Images
- Fonts
- Videos
- Web fonts
- Third-party scripts
- Embedded content
- Other website assets
When the total amount becomes very large, PageSpeed Insights may show the “Avoid enormous network payloads” recommendation.
The problem is not always one huge file.
A page can become heavy because it contains dozens or hundreds of smaller files that add up to a large download.
How Large Is Too Large?
There isn’t one universal file-size limit that makes a website “bad.”
However, if a page is several megabytes in size before the visitor has even interacted with it, there is usually room for improvement.
For example, a page containing:
- 5 MB of images
- 1 MB of JavaScript
- 500 KB of CSS
- 300 KB of fonts
- Other third-party resources
can quickly become a very large initial download.
The first thing you should do is find out what is using the most data.
1. Check PageSpeed Insights First
Before changing anything, test the affected URL using Google PageSpeed Insights.
Look for the Network Payloads or related resource information in the report.
You want to identify:
- Largest files
- Large images
- JavaScript files
- CSS files
- Fonts
- Third-party resources
- Video files
- Total transfer size
Don’t start optimizing random files.
Find the biggest contributors first.
A 2 MB image deserves attention before a 10 KB CSS file.
2. Optimize Your Images
Images are one of the most common reasons WordPress pages become unnecessarily large.
A camera image may be several megabytes even though it is displayed at a much smaller size.
For example, uploading a 4000 × 3000 pixel image when the website only displays it at 800 × 600 wastes data.
Before uploading images, resize them to a reasonable size.
Then compress them.
Use Modern Image Formats
Modern formats such as WebP and AVIF can often produce much smaller files than traditional JPEG or PNG images.
WordPress websites can use these formats to reduce image transfer size while keeping good visual quality.
The important thing is not simply changing the file extension.
The image should actually be encoded in an efficient format and delivered to the browser.
3. Don’t Upload Huge Images for Small Spaces
Think about the size at which an image is actually displayed.
If your blog’s content area is around 900 pixels wide, there is usually little benefit in loading a 5000-pixel-wide image for that location.
Use appropriately sized images.
This can make a major difference on image-heavy websites.
Example
Instead of:
Image: 5000 × 3333 pixels — 4 MB
Use something closer to:
Image: 1200 × 800 pixels — 150–300 KB
The exact size depends on the image and required quality, but the difference in transferred data can be substantial.
4. Enable Lazy Loading for Images
Not every image needs to load when the page first opens.
Images below the visible area can often be lazy-loaded.
With lazy loading, the browser waits until an image is close to being needed before downloading it.
This is especially useful for:
- Long blog posts
- Image galleries
- Portfolio pages
- Product listings
- Pages with many screenshots
- Long landing pages
However, don’t blindly lazy-load every image.
The main image visible when the page opens may be important for the Largest Contentful Paint metric and should normally be available quickly.
5. Compress Your Images Before Uploading
Image dimensions are only part of the problem.
Compression also matters.
A high-quality photograph can often be reduced significantly without a noticeable difference to visitors.
You can compress images:
- Before uploading
- During WordPress upload
- Through an image optimization plugin
- Through an image optimization service
The goal is to find a good balance between quality and file size.
Don’t compress an image so aggressively that it looks visibly damaged.
6. Remove Images You Don’t Need
Sometimes the easiest way to reduce network payload is to stop sending unnecessary content.
Look through the page and ask:
Does this image actually help the visitor?
Decorative images, repeated graphics, old screenshots, background images, and unnecessary stock photos can all add weight.
If an image doesn’t provide useful information or improve the page, removing it may be better than optimizing it.
7. Reduce Large JavaScript Files
Images aren’t the only source of large payloads.
JavaScript can also add significant weight to a WordPress page.
Common sources include:
- Plugins
- Themes
- Page builders
- Analytics
- Tracking tools
- Chat widgets
- Sliders
- Popups
- Social media tools
- Advertising systems
Check which JavaScript files are being downloaded and determine whether they are actually needed.
8. Remove Plugins You Don’t Use
Unused plugins should not remain installed simply because they might be useful someday.
An inactive plugin generally doesn’t load its front-end assets, but keeping unnecessary plugins increases maintenance and security overhead.
More importantly, active plugins may load JavaScript and CSS on pages where their features aren’t needed.
Review your plugin list regularly.
Remove plugins that:
- You no longer use
- Duplicate another plugin
- Add features you don’t need
- Load unnecessary front-end resources
9. Stop Plugins From Loading Everywhere
A plugin may be required on one page but completely unnecessary on the other 99 pages.
For example, a contact form plugin might only be needed on your contact page.
There is little reason for its front-end files to load across every blog post if the plugin supports conditional asset loading.
The same principle applies to:
- Maps
- Galleries
- Forms
- Sliders
- WooCommerce features
- Booking systems
- Popup tools
Load functionality where it is actually needed.
This can reduce both the network payload and browser work.
10. Reduce Unused CSS
CSS files also contribute to the total payload.
Themes and page builders can sometimes generate large stylesheets containing rules that aren’t required for a particular page.
Removing unused CSS can reduce the amount of data the browser needs to download.
Some WordPress performance tools can generate or remove unused CSS automatically.
Test the website carefully after enabling this feature because aggressive CSS removal can cause layout problems.
11. Minify CSS and JavaScript
Minification removes unnecessary characters such as:
- Spaces
- Line breaks
- Comments
- Formatting characters
This reduces file size without changing what the code does.
It won’t solve a huge payload on its own, but it is a useful part of a broader optimization strategy.
For example, reducing a JavaScript file from 300 KB to 220 KB is better than sending the larger version to every visitor.
12. Don’t Load JavaScript That Isn’t Needed Immediately
Some JavaScript doesn’t need to be downloaded or executed during the initial page load.
Examples include:
- Chat systems
- Social widgets
- Marketing trackers
- Some analytics scripts
- Popup systems
- Certain interactive elements
Depending on the script, you may be able to defer or delay it.
This can improve the initial loading experience.
Be careful with scripts that control important parts of the website.
Always test menus, forms, checkout, search, and other interactive features after changing JavaScript loading behavior.
13. Optimize Web Fonts
Fonts are another resource that can quietly increase page size.
A website may load:
- Multiple font families
- Several font weights
- Italic versions
- Different subsets
- External font files
If your website only needs one font with two weights, there is little reason to load six different font files.
Keep your font setup simple.
For example:
- Regular
- Medium
- Bold
may be enough for many websites.
14. Consider Hosting Fonts Locally
If you’re using external fonts, the browser may need to make additional connections to retrieve them.
Hosting the required font files locally can give you more control over:
- Font files
- Font weights
- Caching
- Loading behavior
It can also reduce the number of external connections involved in loading the page.
Only keep the font variations your design actually uses.
15. Avoid Large Video Files on the Page
Video can make a webpage extremely heavy.
A large video file can be several megabytes or much more.
If a video is important, consider using a dedicated video platform rather than serving a huge file directly from your WordPress server.
If you use a video embed, avoid loading the full video player and its resources before the visitor needs it when a lightweight preview or lazy-loaded embed is possible.
16. Be Careful With Background Videos
Background videos can look attractive, but they can also add a huge amount of data.
A visitor on mobile may have to download a large video simply to see a decorative animation behind some text.
Ask whether the video is actually necessary.
If it isn’t, a compressed image or simple visual effect may provide a similar design with far less data.
17. Reduce Third-Party Resources
Third-party resources are files loaded from services outside your website.
Examples include:
- Analytics
- Advertising
- Social media
- Chat
- Heatmaps
- Video players
- Review widgets
- Marketing platforms
You may not control the size of these files, but you control whether you load them.
Review every third-party service on your website.
If something is no longer being used, remove it.
If it isn’t required immediately, consider loading it later.
18. Don’t Add Scripts Just Because They Are Popular
Website owners sometimes install tools because other websites use them.
This can create unnecessary bloat.
Before adding another service, ask:
What problem does this solve?
If the answer isn’t clear, don’t add it.
Every additional script has a cost.
A faster website with fewer unnecessary tools is usually easier to maintain as well.
19. Optimize Your WordPress Page Builder
Page builders can generate additional CSS, JavaScript, HTML, and assets.
This doesn’t mean you must stop using one.
Instead, keep pages simple where possible.
Avoid excessive:
- Animations
- Sliders
- Carousels
- Video backgrounds
- Decorative widgets
- Nested sections
- Interactive effects
A simple section with a heading, paragraph, button, and image can be much lighter than a complicated collection of animated widgets.
20. Check Your Homepage Carefully
The homepage is often the heaviest page on a WordPress website because it contains many different elements.
Check for:
- Large hero images
- Multiple banners
- Sliders
- Videos
- Testimonials
- Logo galleries
- Portfolio images
- Social feeds
- Maps
- Animation libraries
You don’t need to remove everything.
Just identify which elements provide real value and which ones are adding weight without helping the visitor.
21. Use Browser Caching
Browser caching doesn’t necessarily reduce the first visit’s network payload, but it can reduce repeated downloads for returning visitors.
When static files are cached properly, the browser can reuse them instead of downloading them again.
Useful cache targets include:
- Images
- CSS
- JavaScript
- Fonts
Configure sensible cache durations for static assets.
22. Use a CDN
A Content Delivery Network can serve static resources from locations closer to visitors.
A CDN doesn’t magically make a 5 MB image smaller.
The file is still 5 MB.
But a CDN can improve how quickly that file is delivered and can reduce the distance between the visitor and the server.
For best results, combine a CDN with actual payload reduction.
Don’t use a CDN as a replacement for optimization.
23. Use Compression
Server-side compression can reduce the amount of data transferred for text-based files.
Common compression methods include:
- Gzip
- Brotli
These are especially useful for:
- HTML
- CSS
- JavaScript
- SVG
- Other text-based resources
Image compression is a separate process and should be handled through appropriate image optimization.
24. Don’t Confuse Payload Size With Page Speed
A large network payload is an important performance issue, but it is not the only thing that determines how quickly a website feels.
For example, two pages might both transfer 2 MB of data but perform very differently.
Other factors include:
- Server response time
- Resource priority
- JavaScript execution
- Image loading order
- Render-blocking resources
- Caching
- CDN performance
- Main-thread work
- Layout shifts
That’s why you should look at the complete PageSpeed report rather than trying to fix one warning in isolation.
25. Check the Largest Files First
When optimizing a page, don’t spend 30 minutes trying to save 5 KB from a small CSS file while a 2 MB image is sitting on the page.
Prioritize.
A useful order is:
- Large images
- Videos
- Large JavaScript files
- Large CSS files
- Fonts
- Third-party resources
- Smaller assets
Removing one large unnecessary resource can have a bigger impact than optimizing dozens of tiny files.
A Practical WordPress Payload Reduction Checklist
Use this checklist when PageSpeed Insights reports a large network payload:
- Test the affected URL
- Find the largest downloaded resources
- Resize oversized images
- Compress images
- Use WebP or AVIF where appropriate
- Lazy-load below-the-fold images
- Remove unnecessary images
- Remove unused plugins
- Prevent plugin assets from loading where unnecessary
- Minify CSS
- Minify JavaScript
- Remove unused CSS
- Reduce unnecessary JavaScript
- Limit third-party scripts
- Reduce unnecessary font weights
- Optimize or lazy-load video
- Remove unnecessary background videos
- Enable text compression
- Configure browser caching
- Use a CDN
- Test the page again
How Much Can You Reduce a WordPress Network Payload?
It depends on what is currently making the page heavy.
A page that is already well optimized may only have small opportunities left.
A page containing uncompressed images, several videos, multiple third-party scripts, large JavaScript files, and many font variations could potentially be reduced by a significant amount.
There is no universal percentage you should target.
Instead, focus on removing unnecessary data while keeping the content and functionality visitors need.
Does a Large Network Payload Hurt SEO?
A large payload can contribute to a slower user experience.
Page speed and user experience are important parts of Google’s broader page experience considerations, and Core Web Vitals are used as measurable signals.
However, you should not treat the PageSpeed score itself as a direct ranking target.
The better goal is to build a website that loads its important content quickly and works well for real visitors.
What Is the Best Way to Fix an Enormous Network Payload?
There isn’t one magic setting.
The most effective approach is usually:
Find the largest resources → remove unnecessary resources → reduce the size of remaining resources → load non-critical resources later → test again.
This approach is much better than installing several optimization plugins and enabling every option.
Final Thoughts
The “Avoid enormous network payloads” warning usually means your page is asking the browser to download more data than it needs.
Start with the biggest files.
Optimize your images, remove unnecessary videos, reduce JavaScript and CSS, simplify fonts, control third-party scripts, and make sure plugins aren’t loading assets where they aren’t needed.
You don’t need to make your website empty just to make it fast.
The goal is simple:
Send the browser only the resources it actually needs, and send them at the right time.
That will make your WordPress website lighter, faster, and easier for visitors to use—especially on slower mobile connections.