Best Free Online Image Resizer for Mac (Detailed Guide)

Here’s a write up that helps you get along with how to resize images on a mac device. There are multiple online applications available for resizing the images stored in your mac system, but you should only choose reliable functionalities that produce great results. So, read further to know more.

When it comes to digital photo editing, one of the most important processes revolves around image resizing. Image resizer allows you to resize images by dragging and dropping your selected files with the right mouse button.

Image resizing is necessary when you need to increase or decrease the total number of pixels, whereas remapping can occur when you are correcting lens distortion or rotating an image. Zooming refers to increasing the quality of pixels so that when you zoom an image, you will see more details.

Image resizing can be beneficial from multiple perspectives. Maximum image size is determined by the megapixels of a given camera. Pixels have no set physical size. Each pixel represents one sample of a single color. When an image is resized, the number of pixels is changed.

What are Reasons for Image Resizing?

When an image is resized, its pixel information is changed. For example, if an image is reduced in size, the photo editor will declare any unneeded pixel information. There are so many reasons why we resize an image. These can be.

1. The most common reason for resizing photos is to reduce the size of large files to make them easier to email or share online. When you resize an image, you change the image's size without changing the amount of data in that image.

2. Image resizing helps to change an image's height, size or width.

Why is image resizing important?

Images are essential on the web. They keep users engaged and make a website, blog post, banner ad, and email look professional. But those same images might be harming your site.

When optimizing websites for faster page load time, one of the most common errors we see is that images are not the proper size, requiring the browser to resize the image every time the page loads. Large files will negatively affect the loading speed of your pages and hence provide an unpleasant user experience.

Since images can often make up the bulk of the bytes needed to load a web page, everything we can do to make our images smaller and easier to load will pay dividends in increased site speed. Reducing the size of your files speeds up the loading time of your pages, which makes visitors stay longer on your pages.

Does Resizing Affect Image quality?

Reducing an image’s size or dimensions won’t affect image quality. Making an image to be larger than its original dimensions can be tricky. Resizing an image larger than its original dimensions can affect the quality. 

That is why it is much easier to downsize than to enlarge an image. If an image is needed for high-quality (publishing) or large format (poster) prints, be sure that it is captured using the highest resolution and quality possible because of the difficulty in enlargement.

Resizing images can be tricky because when you reduce the size of an image, you also reduce the number of pixels. The more you reduce the number of pixels, the more you reduce the quality of the image. But there are ways to resize an image without losing quality with the help of

What Apps are used in Image Resizing?

Not all of our images are the exact size we need, so it is important to understand how to resize an image properly and how resizing works. So we discussed some applications with the help of which we can resize. These are:


Home Page of Shrink.Media is a tool that intelligently reduces the file size of your images by compressing and reducing the dimensions of the files. We enable all users from across the globe to utilize the power of our tool for their personal and professional needs. It is the fastest, most intuitive and most intelligent image file reducer tool in the market today. 

It can reduce the image size and doesn't require any technical knowledge. You truly get exceptional results while using to reduce your images' size. You can compress JPEG, PNG, and WEBP files. develops it.


  • Faster web page loading: Reducing image size results in faster web pages, improving web performance.
  • Less bandwidth utilization: Lower file size also results in lower bandwidth utilization.
  • Better use experience: Higher page load speed enhances overall user experience.
  • It's free: The image compression service is completely free of charge.
  • Safe: is a safe app to use. 

2. Resize Sense:

Home Page of Resize Sense

Resize sense is a candid photo resize for Mac. This program was developed to help users simplify their work by adjusting images to bulk to the right size for social networks, email or various graphic design projects.

The app offers you numerous alternatives to resize your photos: selecting the maximum file size or cropping, which lets you crop and straighten your images using a predefined aspect ratio. Resize sense allows you to build your own presets and easily apply them later to new batches of images.

3. Tweak photos:

Home Page of Tweak photo

Tweak photos is a batch editing app that offers plenty of features to optimize and enhance your images. The app is simple to use, thanks to the intuitive layout and breaks it down in easy to follow steps: add photos, apply the desired effects and select your save options.

With tweak photos, you can easily resize your photos in pixels or percentage and auto-correct the orientation based on the EXIF metadata. The app also allows you to crop, rotate and watermark your pictures and enhance them by reducing the noise or adjusting things like brightness and contrast.

4. Batchphoto: 

Home Page of Batchphoto

Batch photo is an easy-to-use app to resize images in bulk on Mac. The app allows you to change the size of your photos by entering the desired dimensions for width and height expressed in either pixels or percentages and offers a preview tab so you can see how your shrunken image will look.

Additionally, you can find an advanced resizing filter that enables you to change the DPI of your images or specify the desired document size in inches.

The batch photo focuses on improving users' productivity, and that's why it comes with the option of saving your settings as profiles and loading them later in another session. Another productivity booster is the folder watch, particularly useful if you are constantly working with new images and need to reduce their size.

This feature makes your job so much easier because it monitors certain folders for newly added images and automatically applies a set of edits you previously defined.

5. Image Resizer:

Home Page of Image Resizer

Image resizer, by Tweaking technologies, allows you to reduce the size of your pictures in a clear, uncomplicated manner. The interface is intuitively designed and revolves around three main stages.

Unfortunately, the program does not boast a large variety of features. Image Resize replaces at your disposal a couple of options to make photos smaller. You can select one of the four predefined resolutions, with 1920*1080 pixels being the highest, as well as customize the width\height in either pixels or percentage. In the same step, you will find multiple options to rotate photos and flip them.

6. BeFunky:

Home Page of BeFunky

BeFunky is another free image resize that offers a lot of features. The tool lets you resize images by height, width, or percentage scale. If you need the photo 500 pixels wide, you can type that into the width field.

You can manually choose height and width by unchecking the lock aspect ratio box, which can affect the photo quality. Basic photo editing and resizing is free with BeFunky premium.

7. Sizerox:

Home Page of Sizerox

If you are looking for a simple app to reduce photo size on your Mac, Sizerox is worth a look. This app may not have the sleekest design and may not offer the same editing options as others, but it makes up for it through ease of use and batch processing abilities.

You can change the image size by percentage, ratio, fixed width and height, longest slide and more, the options are numerous. Additionally, you can perform other edits, such as rotate, crop and rename pictures. Adding a customizable text or logo watermark can also protect your photos.

8. Preview: 

Home page of Preview

Preview is not a benchmark for image editing, but it can be used for various optimization-related operations, such as resizing, cropping, converting and color adjusting. To resize the size of your files, you need to select them with a preview.

Next, go to the menu bar to edit> select all and then choose tools> adjust size. Now you can select one of the numerous preset standards or customize the width and height values according to your needs. You can also choose a unit of measurement between pixels, percentage, meter, centimeter or points.

9. Fotor:  

Home Page of Fotor

Fotor is a multipurpose tool with image editing and collage making capabilities. This app comes with a batch processing feature, allowing you to apply the same change to a group of photos, including reducing their size.

Just click on batch resize and then on resize. Next, you must enter the new values for the width and height. Fotor is packed with options to optimize and enhance your images.

You can rotate, crop and straighten your shots, adjust parameters like the exposure, contrast or saturation, manipulate the white balance, remove red eye or add a vignette. The app places an impressive variety of effects and scenes at your disposal to create artistic images and lets you directly share them on all popular social networks.

10. PhotoMarks:

Home Page of Photo Marks

Photomarks gives you a chance to resize multiple photos at once on Mac in a fast and easy manner. Fast because the app takes advantage of multi-core processors to accelerate the process.

Easy because the app is designed as a three-step wizard. All you have to do is add your pictures in the first step, make the edits in the second and select your output format and folder in the last. You can easily adjust the size of your images by manually entering the preferred new dimensions for the width and height, expressed in either pixels or percentage.

If you constantly need to resize images to the same dimensions, photomarks lets you save your settings as profiles and load them in future projects. In the same editing session, you can convert, rotate, and crop photos, add frames and borders, and insert text and logo watermarks.

11. PhotoResizer Pro: 

Home page PhotoResizer Po

PhotoResizer Pro is a mac program developed to optimize images in bulk. The app is designed with a single window interface, making the editing process clear and straightforward. Just drag and drop your pictures, select one of the available options and then click on the resize all button.

PhotoResize Pro offers multiple methods to reduce the size of your pictures. You can choose from numerous preset sizes, type in the new dimensions in diverse units, select to fit width\ height, fit to rectangle, crop to rectangle, or stretch to fill the rectangle. The tool allows you to save your resizing configuration as a new preset and use it later.

How to use in Mac for image Resizing Step by Step:

Step 1 - Click on the Upload Image option to upload an image to compress the image. You can upload images from your phone gallery.

Home Page of

Step 2 - After uploading your picture in, you can either set the values for photo quality and dimensions or set the width and height of the image you want. Press compress and wait for a few seconds.

2nd Step to Upload Image

Step 3 - Download the transformed picture and enjoy using it wherever you like. 

Last And Final Step to Download Image in reduce Size


Consumers prefer visual content over text-based static information. When a visual is added to the content, marketing campaigns become more compelling and keep your target audience engaged. Good images are critical for driving more traffic, growing sales, and earning customer trust.

Bad images can hurt your company’s reputation. That’s why using high-quality, beautiful photos for social media pages and your sites is essential. To get high-quality images, you need to have graphic design experience or hire a professional graphic designer, which can be expensive. Luckily there are plenty of online image resizer tools like available to resize your images.

If you are on the hunt for an image resize for Mac, is an app that will simplify this process. It is faster and easier to use than your built-in build on Mac, as an image of high quality creates a great first impression on the customers.

The previous image resizes tools to ensure you get the right image size and quality to build an online presence. These tools are free to use, and you can use them without prior experience.

Also Read - Resize / Reduce Image Size to 35 KB

                        Image Resize To 10 KB Online Free

                       Resize/ Reduce Image Size to 20 KB

Learning Guide to Resize Your Images


Here, we have listed some of the commonly asked questions from the community. If you do not find the information you need, feel free to reach out to us at

How can I resize WEBP images for free?

down arrow


Step 1 - Open

Step 2 - Upload the webp image using upload button and system gallery

Step 3 - Set parameter values and press compress

Step 4 - You’ll have the resized image on the right side. Edit the image further or download it in your system.

Will I lose the image quality by resizing online?

down arrow

The tools are designed to ensure that you get a perfect quality image. However, you may lose some of the image quality while resizing it, but it would improve the web performance of your site. 

How do I reduce PNG file size to 100 kb?

down arrow

Step 1 - Open application or website.

Step 2 - Upload the png image that you want to compress.

Step 3 - Set the parameter values or specify the height and width of the image that you want as in result.

Step 4 - Press compress.

Step 5 - You’ll have the transformed image as per the parameters that you required. Download and save it in your system.

How do I resize a PNG file in Mac?

down arrow

Step 1 - Open your browser in the mac device and search for

Step 2 - Click on

Step 3 - Upload the png file in the tool and set parameter values that you desire.

Step 4 - Compress the image.

Step 5 - Download the transformed image.

Can I scale up a JPEG file for free?

down arrow

Yes, by provides free image resizing for the first few transformations. You need to sign up and log in to your account where you’ll be provided with free monthly credits. You can use them and resize your png files for free.

How do I reduce the size of a photo on my Macbook?

down arrow

To reduce the size of a photo on your MacBook, you can use online tools like Simply visit the website, upload your photo, choose the compression settings, and let the tool compress the image.

Once done, you can download the smaller-sized photo and save it on your MacBook. It's a quick and easy way to reduce your photos' file size without requiring additional software installation on your Macbook.


Remove Background for Free
Reduce Image Size For Free

You can reduce the file size of your images of any objects, humans or animals and download them in any format for free.

Quick And Easy To Use
Quick And Easy To Use

With, you can easily reduce the file size of your images by using the Drag and Drop feature or click on “Upload.”

Remove Background From Any Platform
Reduce Image Size For Any Platform can be accessed on multiple platforms like Windows, Mac, and Android.

Can Be Used For Work And For Personal Use
Can Be Used For Work and Personal Use can be used for personal and professional use. Reduce file size for your collages, website projects, product photography, etc.

Highly Accurate AI
Highly Accurate processes your image accurately and reduces the file size of your images automatically.

Saves Time And Money
Saves Time And Money

You won’t have to spend extra money or time on purchasing expensive softwares to reduce image file size.

Download High Quality Images For Free

Download images in the same resolution that you upload

Every week, we send you one article that will help you stay informed about the latest AI developments in Business, Product, and Design