Bulk Compress Images Mac App

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Aug 30, 2019  An easy way to manually resize multiple photos is to turn to Windows 10 explorer. While there is no function that directly allows you to “bulk resize” your photos, it can still get the job done. You just need to think outside of the box. Here’s what you need to do.

Why to optimize photo? Or simply why to compress image to a specific size? What is compression and when you should use it? These difficult questions can scare a lot of the users. However, everything is not so difficult as it may seem for the first time. This article is aimed to shed light upon such topics as “How to compress image sizes” as well as “What is compression”.

First of all, the understanding which image format to use will give you the opportunity to get the most out of it. Some formats are best suited for obtaining the optimal balance of quality and file size when storing your photos, while other types will make it easier for you to recover a damaged image. There are countless image formats, and from time to time new ones also appear. In general, image formats can be divided into 3 large groups – bitmap, vector, mixed or complex.

Vector images are based on geometric shapes – points, curves, circles, polygons. Examples of vector files are .svg, .cdr, .eps. Complex formats, as it appears from the name, have features of both vector and bitmap images. The most famous example of such a format is .pdf files. Surely everyone came across them because many e-books and documents are stored in PDF-format. However, we are more interested in bitmap formats as we often have to deal with them and namely why to optimize photo when uploading it to the Internet.

Besides that, image file formats can be distinguished based on compression effects. There are quite a few types of compression schemes, but the essence of their existence can be reduced to one task – to compress image to a specific size and we are talking about the bitmap file as efficiently as possible. Because compression can very effectively minimize the size of the images just twice or several times. But with this almost always there is a loss in quality since the main compression algorithm is to select several pixels and replace them with one or two similar in shade. A compressed file will never be an exact copy of the original, with some exceptions. File compression is usually suitable for small photos and is not suitable for professional drawings or high-quality illustrations, presentations.

Compressed files are much smaller than the uncompressed ones and are divided into two main categories: “lossy” and “lossless”. Lossless compression ensures the safety of all information about the image, even if the final image size is somewhat larger. Lossy compression, in contrast, can create files that are much smaller but achieve this by selectively discarding image information. The final compressed file is no longer identical to the original. The visible differences between compressed files and their source files are called “compression defects”. That is why to find a good image compressor software is a question of a great concern.

Useful tips when using an image compressor

  1. Save an image using lossy compression only after editing is finished, since many image manipulations can multiply compression defects.

  2. Avoid compressing the file several times, because compression defects can accumulate and lead to decreasing of image quality. In such cases, the JPEG algorithm may, as a result, create larger and larger files with a constant compression rate.

  3. Make sure that the speckle in the image is minimal, as this will significantly reduce the size of the JPEG files.

Besides that among the reasons for using file compressor apps one can highlight the following:

  • the size of the image affects the speed of the downloading page;
  • the loss of image quality if uploading the original one;
  • image optimization plays an important role in SEO.

There are many compress image Mac solutions that know how to work with bitmap graphics. It is a widespread belief, that in order to prepare graphics for the web, you should use only editors focused on this because only then you can get the most optimized images that will not create an excessive load on your hosting server when they are loaded into users' browsers. However, it can be rather misleading, as non-professional image optimizer apps can perfectly cope with the task, as for instance, PhotoBulk presented by Eltima Software.

Bulk Compress Images Mac

PhotoBulk a quick way to optimize photo on Mac

Despite being a non-professional solution this bulk photo editor copes with the task like a professional one. The app has a rather intuitive, modern and minimalistic interface. There are no needless buttons, icons, moves. This solution can be a cup of tea both for professional users and for the beginners. It should be noted, that in the current version of the app the optimization is implemented without any losses that is to say, that while compression the quality of the photo remains the same without any deteriorations. In addition, while working with PhotoBulk, you can be sure that none of your original images will be corrupted, as the output images are saved separately to the specified by the user folder. Sounds intriguing, doesn’t it? So, let’s move from words to actions and see how this photo optimizer solution works.

Guide on how to compress image sizes

  1. The first necessary thing to do is to download and install the app on your computer. There are two options to download the app:
    • • by following this link;
    • • from the Mac App Store.

  2. After that install it on your Mac.

  3. Drag and drop all the images that require optimization to the editing window of PhotoBulk. There are several ways for moving photos available in PhotoBulk, select the one that appeals the most to you.

  4. All the uploaded photos will be shown at the bottom of the app in a filmstrip way.

  5. To begin the optimizing process, you need to activate the Optimize option in the sidebar. You can find it in the Postprocessing section. However, pay attention that so far, you can optimize JPG and PNG files only.

  6. In order to change the optimization level, you need to move the slider with the help of the mouse by moving it to the left or to the right.

  7. • For minimal compression – the slider needs to be moved to the left;
    • For maximal compression – the slider needs to be moved to the right.

  8. Once you are ready with all the settings, hit the Start button.

  9. In the appeared window you will need to specify the way for the output images to be saved.

  10. And finally, click the “Save” button and wait.

Thanks to image optimizer app for Mac, you will not notice any difficulties in compressing photos, besides that, PhotoBulk can offer you a set of different feature, namely, adding watermark, resizing, converting, keeping metadata or erasing it all.


Requirements: OS X 10.10+ , 12.62MB free space
Version 2.2.270 (14 Sep, 2019) Release notes
Category: Utilities
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With high-resolution camera in our smartphones, every photo we capture, it takes a significant amount of space. We tend to capture thousands of photos and they end up either in our Windows or Mac computer or an external storage device, taking up space there. To organize the huge collection of images, you must reduce the size of photos. It will help you to recover a lot of disk space. It can also help share the images with ease. However, if you want to resize thousands of photos, doing it individually is not a good option. Therefore, you need a bulk image resizer. There are a lot of best bulk image resizer for Windows and Mac which can help you resize images in batch. Let’s know about them.

First, in the article, we will talk about the bulk photo resizer for Windows and then we will proceed to discuss image resizer tools for Mac.

Also Read: how to boost your pc with an optimization tool

Best Bulk Image Resizer for Windows to Resize Multiple Photos

Finding a bulk image resizer can be a hefty task, therefore, we have listed these batch image resizers for Windows to fulfill your needs to organize your photos collection in a few clicks.

1. Image Resizer

One of the best bulk image resizers for both Windows and Mac which can be used to resize, rotate, flip, change the size and rename images in bulk. All you need to do is add a single image or an entire folder without losing the digital quality of any photo.

Features Of Image Resizer:

  • Quickly resizes single or bulk photos.
  • Corrects orientation in images without any trouble.
  • Converts and saves the images in a wide array of image formats.

The tool also allows you to set predefined dimensions and save them to quickly reduce the picture size. Also, creates log reports for every image rescale interval which provides extra information related to resizing tasks which can be used to review a session.

Video Tutorial: Batch Image Resizer For Mac To Resize Multiple Photos At Once

2. Image Resizer for Windows

Image Resizer for Windows is a batch image resizer as it is easy to use. This powerful software is light on system resources and is free. The app allows you to resize a single image or images in bulk straight from your Windows Explorer.

Features Of Image Resizer for Windows

  • The tool is compatible for popular image formats such as JPEG, JPG, PNG, GIF, BMP, ICO, TIFF, WDP and more.
  • Allows you to choose from predefined image sizes or select a Custom Image Size.
  • Comes with advanced options such as custom default sizes, file options, encoding and more.

All it takes is a few seconds to resize your high-resolution image. The app works as a Windows shell extension, that’s why you just have to select a photo or multiple pictures you want to resize.

3. PicPick

PicPick is not only a screenshot capturing tool but also acts as batch image resizer. This app is free and is easy on system resources and allows you to different effects such as frames, mosaic, drop shadows, brightness control, and more.

Features Of PicPick:

  • Allows you to take screenshots of an active window, scrolling window, entire window or a certain region of your desktop.
  • Lets you highlight and annotate your images with shapes, arrows, text.
  • The app saves, share or send images via email, Google Drive, Dropbox, Evernote, Twitter, and more.

Picpick comes with advanced settings which allows you to set hotkeys, image quality, file naming and more.


RIOT is an image resizer which comes with an intuitive interface and allows you to preview the output image. The tool is light on system resources but powerful enough to perform extensive functions.

Features Of RIOT:

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  • Saves and optimizes PNG, JPEG, GIF and more.
  • Allows you to compare the original image with the optimized one.
  • Visually reduces the number of unique colors for GIF and PNG images to decrease file size.

Also comes in handy if you want to remove unsupported metadata. Also, you can transfer metadata between different image format provided the destination format is compatible with it.

5. Graphics Converter Pro

Graphics is bulk image resizer which has a simple to use interface with support for more than 500 graphics format. This app can not only resize images but also can perform operations such as Watermark, cropper, splitter and more

Features Of Graphics Converter Pro:

  • Can convert more than 130 formats into others such as JPF, JP2and other.
  • Allows you to rename and change metadata information.
  • Enables you to convert more than 500 graphics formats to PDF documents in bulk.

With Standard, Custom and Proportion size, this bulk image converter can adjust the size of the image as well. The tool comes with manual mode and auto mode for image combination.

Best Bulk Image Resizer for Mac to Resize Multiple Photos

To resize bulk images on your Mac, check the list of image resizer software and sort your Photos library in a jiffy.

1. TweakPhotos

With Tweak Photos, resize multiple images with a few clicks. Moreover, the app is not just a batch photo resizer, it gives you a lot of other editing options. It also supports more than 50 RAW image formats.

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  • Allows you to explore a wide range of combinations for Batch renaming and format conversions.
  • Enables you to rectify the errors found in preview & helps in editing photos in a batch.
  • Enables you to denoise photos, change texture, effects & put watermark, apply filters to single or multiple images.

Tweak Photos comes with multi-layer management with an auto-correct orientation and rotation controls.

2. BatchPhoto

BatchPhoto is one of the best bulk image resizers for Mac. It is an easy to use app which makes editing multiple photos in a few clicks possible. It also comes with an option to save the settings as presets, so that you can use them in another session.

Features Of BatchPhoto:

It also makes it as efficient as possible by using cloud capabilities to switch from one device to another. You can also conduct various mathematical operations and send/receive emails. Should i upgrade to macos high sierra. MacOS High Sierra v10.13.6 (17G2208) Contacts, calendars, and notes can easily be organized. You can synchronize your documents with your iCloud library and access them every time with your Apple ID.

  • The app can convert, rotate, auto-crop, watermark, put a date stamp or rename bulk photos at once.
  • Allows you to adjust the brightness, saturation, sharpness, and contrast of an image.
  • Comes with special effects, filters, frames, and borders.

BatchPhoto is compatible with all RAW image formats including PNG, JPG, TIF, GIF, PDF. The app enables you to edit your photos share or upload them on Facebook, FTP, or Flickr. It

3. EasyBatchPhoto

EasyBatchPhoto is a batch image resizer for Mac which comes with a user-friendly interface. The app is powerful and responsive. To start editing, all you need to do is drag the app on to the interface and start working on it

Features Of EasyBatchPhoto:

  • Reads JPEG, TIFF, PNG, PSD and other formats but Writes JPEG, TIFF and PNG.
  • Performs operations related to JPEG without compromising the quality.
  • Preserves EXIF headers and allows you to view EXIF headers with inbuilt Inspector Window.

EasyBatchPhoto offers editing tools to perform basic operations such as resizing, cropping, converting, rotating, and watermarking. The app also allows you to create templates for a task and import or export them.

4. JPEGmini

Resize your images without losing the quality of a photo, use JPGmini. The basic operation of the app is to resize or compress a file by deleting unwanted binary information from photos when you export.

Features Of JPGmini

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  • Allows you to change the resolution of your photos, choose any of the of predefined templates for width and height.
  • JPEGmini helps to reduce the file size of photos up to 80% without compromising the resolution of a photo.
  • Retrieves a lot of space on your computer or other storage devices by optimizing the images.

JPGmini can be used as a plugin for Photoshop or Lightroom.

5. PhotoBulk

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PhotoBulk is a bulk image converter tool which can help you reduce the size of photos. The app has a user-friendly interface. The app also allows you to check the preview and save desired settings as presets for your future use.

Features Of PhotoBulk:

  • The tool comes with watermark software, image compressor & image converter, therefore, you can resize, convert or water photos in bulk.
  • Saves a lot of disk space by optimizing PNG or JPEG file without losing the quality.
  • Allows you to stamp your images with a chosen date.

All you need to do is drop your images onto the editor and select the watermark, modify other settings to get the desired outcome.

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So, these are some of the best bulk image resizers for Windows and Mac to resize multiple photos. With these tools, you can resize multiple photos and save storage on your hard disk. Most of them also come with standard editing features as well, so you can always edit the photos while resizing them, making you kill a bird with two stones.

Bulk Compress Images Mac App Download

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