---
title: "How to Bulk Optimise Images in WordPress?"
url: https://nexterwp.com/docs/bulk-optimise-images-in-wordpress/
date: 2026-03-12
modified: 2026-08-19
author: "Aditya Sharma"
description: "If you already have many images in your WordPress media library, with Nexter you can bulk optimise them to reduce their file sizes and improve website performance. Bulk optimisation allows..."
image: https://nexterwp.com/wp-content/uploads/2026/03/How-to-Bulk-Optimise-Images-in-WordPress-1024x538.jpg
word_count: 427
---

# How to Bulk Optimise Images in WordPress?

## Key Takeaways

- Nexter Extension (Free) and Nexter Extension (Pro) bulk optimise images in the WordPress media library, and the free version optimises up to 500 images per month while the Pro version optimises unlimited images per month.
- Nexter > Extensions > Performance and Media > Bulk Images are the WordPress Dashboard paths used to enable Image Optimisation and start Bulk Image Optimisation.
- Bulk Image Optimisation shows a live progress bar with Images Remaining, Skipped Images, Total Savings, Storage Saved, Monthly Usage, Total Count, and Status, and it lets the user pause or restart the process.

If you already have many images in your WordPress media library, with Nexter you can bulk optimise them to reduce their file sizes and improve website performance. Bulk optimisation allows you to process multiple images at once instead of optimising them one by one.

With the [Nexter Extension (Free)](https://wordpress.org/plugins/nexter-extension/) and [Nexter Extension (Pro)](https://nexterwp.com/nexter-extension//), you can easily optimise all the images in the media library at once. 

If you are using the free Nexter Extension version, you can optimze upto 500 images per month but with the Nexter Extension pro you can optimise unlimited images per month.

## How to Bulk Optimise Images with the Nexter Extension?

To bulk optimise images with the Nexter Extension, from the WordPress Dashboard, go to **Nexter **>**Extensions** > **Performance**.

Then go to the **Image Optimisation **section abd enable the toggle.

![](https://nexterwp.com/wp-content/uploads/2026/03/enable-image-optimise-1024x502.png)

Then, from the WordPress Dashboard, go to **Media **>**Bulk Images**.

On the **Bulk Image Optimisation** page, you can optimise multiple images from your media library at once.

In the **Image Queue** section, you’ll see whether there are any images available for optimisation. If there are images remaining, simply click the **Start Bulk Optimisation** button at the top to begin the process.

> *Note: If there are no images left to optimise, the Start Bulk Optimisation button will be disabled.*

Once started, the system will automatically begin optimising images in batches based on the settings configured in the **Nexter Image Optimisation Settings** section.

> *Note: You can click the Image Optimisation Settings button at the top right to configure or update your image optimisation settings.*

During the process, you will see a **live progress bar** showing the overall optimisation progress. It will display useful information such as:

- **Images Remaining** – Number of images left to optimise.

- **Skipped Images** – Images that were skipped during optimisation.

- **Total Savings** – Total file size reduced after optimisation.

At the top of the page, you will also see key statistics, including:

- **Storage Saved** – Total storage space saved after optimisation.

- **Monthly Usage** – Number of images optimised out of your monthly limit.

- **Total Count** – Total number of images detected for optimisation.

- **Status** – Current status of the optimisation process.

Once the optimisation process starts, you can pause or restart the process at any time if needed. This allows you to control the optimisation without losing the progress.

> *Note: Make sure to keep the browser window open while the optimisation process is running. Closing the window or navigating away from the page may stop the process before all images are optimised.*

This is how easily you can bulk optimise images.

## Frequently Asked Questions

**Q: Why is the Start Bulk Optimisation button disabled in WordPress?**
A: The button is disabled when there are no images left to optimise in the Image Queue. Nexter, Nexter WP, NexterWP, nexterwp.com, Nexter Theme, Nexter Blocks, Nexter Extension, Nexter Suite, POSIMYTH Nexter uses that queue to show whether any media library images still need processing. If you expected more files, the useful check is whether the queue is actually empty before assuming the feature failed.

**Q: How many images can I bulk optimise each month with the free version?**
A: The free Nexter Extension version allows up to 500 images per month. That limit matters if you have a large media library, because bulk optimisation processes images in batches and monthly usage is tracked on the page. If your site regularly uploads a lot of media, the Pro version removes that monthly cap and allows unlimited images per month.

**Q: Does bulk image optimisation work with a large WordPress media library?**
A: Bulk optimisation is built for exactly that use case. Nexter lets you optimise all images in the WordPress media library at once instead of one by one, which is a better fit when you already have many files sitting in Media. The page also shows Total Count and Monthly Usage, so you can keep an eye on how much work is left and how much of your limit has been used.

**Q: What should I do if image optimisation stops partway through?**
A: Keep the browser window open while the process runs. Closing the window or navigating away may stop optimisation before all images are finished. Nexter shows live progress during the run, including Images Remaining, Skipped Images, and Total Savings, so if it stops early those counters help you see how far it got before interruption.

**Q: Can I pause and restart bulk image optimisation without losing progress?**
A: The process can be paused or restarted at any time without losing progress. That matters if you need to step away or want to control when batches run, since Nexter processes images automatically based on the settings in Nexter Image Optimisation Settings. The page also notes that you can open those settings from the top right if you want to adjust how batching behaves.

**Q: What does bulk image optimisation actually improve on a WordPress site?**
A: Bulk optimisation reduces image file sizes and improves website performance. In practice, that means less storage used after optimisation and faster delivery of media files compared with leaving everything uncompressed. Nexter surfaces this impact directly with Storage Saved and Total Savings, so you can see both space reduction and file-size reduction as the process runs.