# Configuring image compression in WordPress

> Change the JPEG quality WordPress uses when compressing uploaded images to balance image quality and page speed.

Source: https://helpcenter.ruachost.com/wordpress/guides/configuring-image-compression-in-wordpress/

WordPress automatically compresses uploaded images to balance quality and performance. On **ruachost.com**, you can configure image compression to optimize storage space and improve site loading speed, especially for mobile users.

## Why Configure Image Compression?

- Saves disk space on your hosting account.
- Improves page load times for visitors.
- Reduces bandwidth usage, especially for mobile users.
- Enhances SEO by improving site performance.

## Default WordPress Compression

- By default, WordPress compresses **JPEG images to 90% quality**.
- This ensures images look sharp while reducing file size.

## Adjusting Compression Quality via PHP

1. **Log in to WordPress** with an administrator account.
2. In the dashboard, go to **Appearance → Theme Editor**.
3. Select your active theme and open the **functions.php** file.
4. Add the following code snippet:

   ```
   // Change WordPress image compression quality
   add_filter('jpeg_quality', function($arg){ return 70; });
   ```

   - Replace `70` with your desired compression level (range: 0–100).
   - Lower values = smaller file size but reduced quality.
5. Click **Update File** to save changes.

✅ New images uploaded will now use the updated compression quality.

## Regenerating Thumbnails (Optional)

If you want to apply the new compression settings to previously uploaded images:

1. Install and activate the **Regenerate Thumbnails plugin**.
2. Go to **Tools → Regenerate Thumbnails**.
3. Select **Regenerate All Thumbnails**.
4. Wait for the process to complete.

✅ All existing images will be re‑compressed with the new quality setting.

## Important Notes

- Always back up your site before editing theme files.
- Use a **child theme** to preserve changes during updates.
- Test different compression levels to balance quality and performance.
- Consider using caching and CDN services for additional optimization.