Image Caching Test
What is it?
Checks if your page is using an image expires tag, which specifies a future expiration date for your images. Browsers will see this tag and cache the image until the specified date (it doesn't re-fetch the unchanged image from your server). This speeds up your site the next time returning visitors arrive at your site and require the same image.
Pass rate:
- Top 100 websites: 97%
- All websites: 80%
| 2021 | 99% |
|---|---|
| 2022 | 98% |
| 2023 | 97% |
100
75
50
25
0
How do I fix it ?
In order to reduce the number of HTTP requests, you can use the HTTP Expires header to set an expiration time for your images or any other content type.
You can add the following lines into your .htaccess file:
<IfModule mod_expires.c>
ExpiresActive on
ExpiresByType image/jpg "access plus 1 month"
ExpiresByType image/jpeg "access plus 1 month"
ExpiresByType image/gif "access plus 1 month"
ExpiresByType image/png "access plus 1 month"
</IfModule>
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