Best Image Resizing Software for Mac in 2025: Free & Paid Options Compared

According to an estimate, Mac users spend an average of 12 hours every year on manually resizing images. However, you can streamline this time-consuming task pretty easily with the help of right tools. While macOS's built-in Preview app is good for basic resizing, it lacks features like batch processing and seamless workflow integration.

And… if you are a pro, you may already know that manual resizing can lead to quality degradation if not done correctly. To address these challenges, we've compiled a list of the top mac image resizer tools and software in 2025. As these options include both free and paid options, anyone can use them easily to enhance efficiency and maintain image quality.​

So, without any further ado, let's get right into it…

Part 1: Top 8 Mac Image Resizers to Resize Photos

Below is a comparison table that highlights key features of each software:

1. Preview

Preview is macOS's built-in image and PDF viewer that offers basic image editing features, including image resizer. With this pre-installed application, users can seamlessly adjust image dimensions by selecting 'Tools' > 'Adjust Size' within the app. On top of that, Preview can access almost all image scanners compatible with macOS. This means you can scan an image and let preview do the resizing within minutes without having to download any extra software on your system.

While it's readily accessible and absolutely free to use, Preview lacks batch processing and automation features. Therefore, we wouldn’t recommend it for frequent users who want to resize multiple images simultaneously. Another downside of Preview is that it supports only limited formats, including BMP, JP2, JPEG, TIFF and PNG, etc.

Standout Feature : Preview comes already-installed on all Macs. It has consistent features and user experience across all macOS versions.

2. Adobe Photoshop

Adobe Photoshop is the gold-standard for professional image editing. As a comprehensive editing suite, Photoshop offers matchless feature-set for resizing, retouching, and graphic design.  With its advanced settings such as magic wand, pen tool, etc, users can get almost pixel-perfect resizing and compositing. In addition to all this, Photoshop allows users to resize images individually or set up batch processing through various actions and batch scripts. Photoshop has support for almost all formats and provides every pro feature you can expect to maintain image quality during resizing.

However, Photoshop requires a steep learning curve. If you’re a beginner with no tech experience, getting into and understanding all the Photoshop features can be a tall ask. Another major issue with this software is that it's not free. You have to pay to get a subscription and then resubscribe after regular intervals.

Standout Feature:Photoshop’s comprehensive toolkit for professional-grade editing and cloud-based collaboration solidify its position as the gold standard for creatives

3. UniConverter

If you want the best mac software to resize photos, look no further. Wondershare UniConverter is a multifunctional software that includes a robust image resizing module. Users can resize multiple images simultaneously and convert them to various formats as and when necessary. As of this writing, UniConverter supports 1000+ image and video formats, which makes it the best image resizing software for mac computers.

Adding to its utility as an image resizer is its aspect ratio preservation feature. This means UniConverter automatically maintains the proportions of the converted images to prevent any distortion around the edges which is common with other similar tools.

As such, the software is designed to streamline workflows for users who frequently handle different media types.

Standout Feature: UniConverter’s combination of batch processing, format conversion and aspect ratio preservation makes it a time-efficient solution for bulk image optimization.

Best Mac Image Resizer

Easily resize pictures on Mac in bulk while retaining its orginal image quality.

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4. XnConvert

XnConvert is an absolutely free, open-source and powerful batch image processor that supports over 500 formats. It has an iOS app available on the official Apple store along with a website that provides a downloadable link to the software for macs. As an image resizer, XnConvert comes up with several editing actions, including resizing, and allows users to apply multiple transformations in one go. Because it's an open-source software, tech-savvy users can deploy their own custom scripts to automate workflows. Its extensive format support makes it ideal for users dealing with diverse image types.

Standout Feature: XnConvert’s open-source framework and multi-platform support cater to tech-savvy users who want a free yet customizable solution.

5. Resize Master

Resize Master is a dedicated image resizing tool that offers both preset and custom size options. It supports batch processing, allowing users to resize multiple images efficiently. In addition to this, users can also watermark their images easily with just a single click of the button. In terms of features, resize master provides many unique tools such as fit to rectangle, scale by height or width, scale by percent, change aspect ratio, etc.

The iOS app is designed with a focus on simplicity and speed. Therefore, this image resizing app is best suitable for users who need quick resizing without extensive editing features. Nevertheless, keep in mind that this is a paid application and it only supports limited image formats.

Standout Feature: Resize Master’s focus on preset-driven workflows could benefit users prioritizing speed over customization.

6. JPEGmini

As the name suggests, JPEGmini specializes in reducing the file size of JPEG images. Most notably, JPEGmini is particularly helpful for professionals who want to optimize images for faster loading times while preserving visual fidelity.

If you’re a Lightroom maxi then you can take advantage of the JPEGmini’s Lightroom plugin. With this plugin you can seamlessly integrate both software to supercharge you editing skills. In addition to all that, this offline image resizer also supports batch processing. And it goes without saying that JPEGmini is exceptionally efficient for handling large photo libraries.

However, this software only works with JPEG files, which can significantly limit its practicality in professional life.

Standout Feature: JPEGmini’s perceptual optimization technology sets it apart for photographers and web developers balancing quality and storage.

7. Resize Sense

Resize Sense is a flexible resizing macOS-exclusive tool for professional use. It offers flexible resizing and cropping options that allow users to define exact dimensions, fit modes, and aspect ratios among other helpful features. It means users can set custom dimensions for individual images during batch processing.

Like most other tools on our list, Resize Sense also supports batch processing for multiple files. But, in addition to that, users can also get live previews of their work to make sure the output meets their specific work requirements. Therefore, this tool is ideal for professionals who need precise control over image dimensions.

Standout Feature: Resize Sense’s hybrid batch-and-manual editing empowers Mac users to maintain creative control in bulk workflows.

8. Image Resizer

Image Resizer is a straightforward website tool that simplifies the process of resizing images. As its an online tool, anyone (whether they are on Windows, Linux or macOS) with a working internet connection can use it with ease. This free application offers a quick and efficient way to handle basic image resizing tasks without overwhelming users with advanced features. Ideal for casual users, Image Resizer supports all of the common image formats and provides a clean and intuitive interface.

Standout Feature: Simple and effective online image resizing tool for basic tasks.

Part 2: How to Use a Program to Resize Photos on Mac

Below is a step-by-step guidance to help you resize photos using one of the best batch picture resizer Mac software, UniConverter. Follow along…

Step 1. Open UniConverter on your Mac.

Download Download UniConverter from its official website, and install it on your Mac. Now, launch the software.

Step 2. Navigate to the 'Converter' tab.

Go to the Converter tab as seen in the screenshot above.

Step 3. Add your images to UniConverter

Drag and drop your images into the converter window.

Step 4. Go to Settings

Click the tiny gear icon next to each image to open up the settings menu. Here, you can select your desired image dimensions and format, etc. After clicking on "OK", this setting will be automatically 

Step 5. Start batch processing.

As the final step, click the blue 'Convert All' button to begin the batch resizing process.

Best Batch Picture Resizer Mac

Easily resize pictures on Mac in bulk while retaining its orginal image quality.

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Part 3: FAQs about Photo Resizing Software for Mac

Q1: How to resize images on a Mac?

Resizing images on Mac is simple. You can use its built-in tool like Preview for basic resizing. Alternatively, third-party software like UniConverter are ideal for batch processing and advanced features.

Q2: Is there a free resizing image tool for Mac?

Yes, there are several free image resizing tools available for mac computers. For instance, you can go for pre-built apps like Preview. And if you want more resizing options then XnConvert or UniConverter can be ideal for batch processing.

Q3: How do I reduce file size on a Mac?

You can reduce file size by resizing images in Preview or using any pro compression tools like JPEGmini for JPEG formats. Nevertheless, if you want to significantly reduce image size, we recommend using professional tools like UniConverter or Photoshop.

Q4: How do I compress a JPEG on a Mac?

While there are several image compressor tools available, only use reliable ones. You can opt for for JPEGmini or UniConverter to compress JPEGs while maintaining image quality.

Conclusion

All things considered, resizing images on a Mac has become as easy as it can get. With specialized image resizing software and tools for mac mentioned in this write-up you can achieve this with ease. Due to the advancements in technology, these tools now range from built-in solutions like Preview to advanced third-party apps like UniConverter and Adobe Photoshop. UniConverter, is particularly helpful in this due to its batch processing, quality retention, or seamless workflow integration features. Try it today, and let us know what you think.