Best Free Image Compression Tools

Image compression is now very essential to optimize the performance of websites. Optimizing your images for your website will help your site load faster. The improved loading time speeds mean better search engine rankings! We have found some image optimization tools and in this guide, we will share the best free image optimization tools you can use for image compression.


Further reading:

How to fix a slow-loading website

Enhance your search engine performance in simple steps

Image Optimization for High Ranking

Image Optimization for the Web


Many desktop photo editing programs like Adobe Photoshop optimize images but, depending on your budget, these programs may be very expense for you and you may not be able to afford. Luckily, the applications we share here are a variety of online tools that are free to use and deliver amazing results.


Why Image Optimization Matters

According to HTTP Archive, images make up 24% of the total web page’s weight. Optimization is a proven way to reduce image file size and make website to look smarter. If your web pages take too long to load, visitors might get tired of waiting and move on to some other websites. Optimized images will improve your SEO and your website will eventually rank higher. 

Optimized images will take less bandwidth. Taking less storage on your server means you save money and improve performance at the same time. It also increases the chance of boosting conversions. Such optimization helps you backup your website faster too.


Further reading:

Best Plugins for Faster Loading WordPress Websites

Tested Tips To Increase Joomla Website Loading Speed

The Complete Guide to WordPress Speed Optimization

The keys to high rankings in Google's local results

The Top Most Important Google Ranking Factors


How to Optimize Images For the Web

The secret of successful image optimization is to find the perfect balance between the lowest file size and standard image quality. There are things that play huge role in image optimization. These are image file format, compression, and image dimension. By optimizing images with the right combination of these three, you can reduce image size by up to 80%.

Resize Images Perfectly

Resizing images mostly depends on the website images will be used for. In most of the cases, it is important to choose the right dimensions while resizing images. Alongside choosing the right width and height, you can reduce the image resolution as well. Make sure you don’t upload large image files.

Choose the Right Image Format

Image file size also depends on the format of the images. In fact, choosing the right format can help you reduce the image file size significantly. Even you can serve a better quality image in smaller file sizes just by choosing a different file format. This is why you need to have a good understanding of the major image file formats. 

There are plenty of image file formats. The most commonly used ones are: (JPEG, PNG, and GIF). Let’s know them in more detail.

  1. JPEG: JPEG stands for Joint Photographic Experts Group. The major benefits of JPEG are that it displays millions of colors, and it’s well-suited to high compression levels. A JPEG image can be compressed down to 5% of its original size. JPEG is an excellent option to display complex photographs that include a lot of colors.
  2. PNG: Portable Network Graphics aka PNGs are as popular as JPEGs for the webpage images. You better use PNG for images with less color otherwise image size can be heaver than JPEG in some cases.
  3. GIF: Graphics Interchange Format (GIF) has more specific uses. People usually use the GIF format to showcase animations. But you can also GIF for static images. Sometimes GIF saves you from using large files like videos. 

Compress Images

Images make up most of the weight and file requests for most web pages. By optimizing images, you can make web pages lighter and faster.

If you compress images correctly, you don’t need to compromise on the quality. Optimize the images preserving almost the same quality as the original. For the web uses, you can often optimize images heavily without reducing display quality.


Let’s take a look at the best free optimization tools for image compression:

Best Free Image Optimization Tools for Image Compression

1. JPEG Optimizer

JPEG Optimizer allows you to upload and compress your photos online. This simple tool works, as its name implies, only on JPEG files.

What’s great about JPEG Optimizer is that it allows you to resize your images before you optimize. Resizing your images will save you even more loading time, and with this online platform you don’t have to split your workflow into two steps.

JPEG Optimizer also allows you to select your own optimization level, which lets you control the quality of your optimized image. This feature is especially important for photographers, since you’ll want to find the sweet spot between preserving quality and saving space.

2. Optimizilla

Optimizilla manages to reproduce great quality in your images with lowest file size possible. And you can compress both your JPEG and PNG photos with this tool. 

Optimizilla also features a slider which shows you the before and after version of your photo. That way, you can preview the quality of your image before continuing. With the slider, you can decide how much you want to optimize your image before you experience any noticeable quality loss.

This online tools is great for batch processing. Optimizilla allows you to upload up to 20 images at a time and to set the compression level for each photo separately.

Unfortunately, since Optimizilla only works on JPEG and PNG files, you won’t be able to use it to optimize your PDFs. Some others on this list will be better suited for PDF optimization.

3. is another bulk image optimizer. With, you can optimize bulk quantities of JPEG, PNG and animated GIF files.

Unlike other image optimizer on this list, optimizes your files for the lowest size. That is, with, you’ll always get the smallest file size version of the image you input. Then, you can download the compressed photos one at a time or in a .zip format. also allows you to export files to Dropbox or import files from Box, Dropbox or Google drive.

If you’re looking for more advanced features, offers a pro version that comes with a slew of other perks like image resizing capabilities, the ability to input multiple image sources at once, unlimited image size uploads and more.

The free version allows you to compress photo files up to 32 MB each in size and up to a total 100MB of photos. So really, how well will work for you depends on the initial size of the images you want to optimize.

4. ImageRecycle

ImageRecycle compresses your JPEG, PNG, GIF and PDF images with impressive results. Their drag-and-drop interface lets you drag photos from your desktop to the optimizer for an easy workflow.

The site also offers free website analysis. When you request an analysis, ImageRecycle returns a free report designed to help you understand which images on your site would benefit from optimization to improve your site’s performance.

ImageRecycle has WordPress plugin, Shopify app, Joomla Extension and a Magento extension. If you use any of these other sites, you can use ImageRecycle’s extensions to compress your images instead of navigating to a separate site.

With ImageRecycle, you get access to a 15-day free trial with a 100 MB limit. After that, you can choose to purchase a paid plan — $10 for 1GB, $20 for 3GB and $50 for 10GB.

5. CompressNow

CompressNow is another easy to use optimization tool that allows bulk upload. Simply upload your JPEG, PNG and GIF images from your computer, set a compression percentage for the images and download them to use on your site.

You can drag and drop up to 10 images at a time. But, unlike Optimizilla, CompressNow applies one optimization level to all the photos you upload. If they all require the same compression level, then CompressNow makes your job even easier!

6. Trimage

Trimage works well for Linux users to remove EXIF and metadata from images. This image compression tool then compresses your JPEG and PNG images to the highest level possible.

If you’re a Mac or PC user, the other options on this list will be a better bet for your system. Trimage is best suited for Linux users.

7. Online Image Optimizer

Online Image Optimizer, a Dynamic Drive product, helps you easily optimize images of all major formats, so your photos load faster on your website.

This tools also includes image conversion features, which can help you turn your JPEGs into PNGs for use online.

Unlike some other image optimizers, Online Image Optimizer also lets you upload images via URL. That means you can optimize images already on your website! In the long run, that saves you time and the effort of replacing the old image with the optimized version online.

Online Image Optimizer only permits you to upload one image at a time, though, and that image can have a maximum file size of 2.86 MB.

8. Tiny PNG

Tiny PNG is one of the oldest and most popular free image optimization tools. With tons of possibilities to compress images for your site, this online tool works great for JPEG and PNG image files.

It allows you to upload up to 20 images in one go and up to 100 images a month. The image size for each image cannot exceed 5 MB, but for most that won’t be an issue. After the compression, you can download the compressed images to your computer or easily save them to Dropbox.

Tiny PNG also offers a WordPress plugin and Magento extension, so that you don’t have to go to navigate away from your own website to compress your images.

9. Resize Photos

Resize Photos is yet another free image compression tool for image optimization. You can also use Resize Photos to resize your images for use on your site, in emails or on forums.

Simply upload your images to the online page and set the compression level between 1-100. Then, download your compressed photos!

You can also use their site to apply image effects from their gallery during the optimization process. These effects include captions, photo effects, borders, reflections, shadows and rounded corners.

10. GiftOfSpeed

GiftOfSpeed offers a host of compression tools to optimize your PNG and JPEG images. It applies multiple image compression techniques to minimize the file sizes to lowest size possible.

With GiftOfSpeed, you can resize images for a greater performance online, as well.

The downside of this tool is that you can only upload multiple files for PNG optimization, not for JPG optimization.

11. makes sure that you don’t loose the image quality while also achieving the high compression levels.

It’s an amazing tool known for its flexibility to optimize JPEG, PNG, GIF and SVG files easily. has the ability to reduce file sizes up to 90% or more!

Once again,’s downfall comes in its upload restrictions. You can’t use to optimize more than one image file at a time.

12. JPEGmini

JPEGmini sends your images on a diet! It shrinks the file size of your images, so you can enjoy the best image loading speed online. It has a better interface than some of the other choices, with an option to upgrade to their Pro version.

Upload your image, then use the slider to view the before and after versions of your photo. You’ll see that JPEGmini maintains the quality of the image after compression.

13. Convert Image

Convert Image compresses JPEG images on the go. This online image optimization tool allows you to convert the JPEG photos into other image formats like BMP, GIF, ICO, PNG and more. It even has some onboard settings which can reverse your image, crop, straighten an image and more.

14. PNGGauntlet

PNGGauntlet works specifically with PNG image files. This downloadable software combines with multiple compressors like PNGOUT, OptiPNG and DeflOpt to compress your images without effecting the image quality. It will also work to convert and compress JPG, GIF, TIFF and BMP to PNG files. 

On the downside, it does take a little longer to optimize than some of the other options.

15. Comprss or Die

Compress or die is by far one of the best image resizer in the market. Compress or Die gives us some of the best results and it is our favourite.

This online tool packs a bit more power in it than the traditional compression and resizing tool. As for using it, this one can't get confused since there are different types of compression available, though there’s no explanation as to what the differences are. That said, let’s simplify things here:

  1. Use compression options
  1. Set the image quality percent to 90% (otherwise, you won’t see any reduction in file size).
  1. Select Progressive compression when resizing JPGs.
  1. Do not enter any values into the Resize row. Just leave it as is so the tool can focus on compression.
  1. Then click on Compress Images.

When it’s done running, you can download the resulting image.

16. ImageOptim

ImageOptim is a Mac-only software you can download straight to your desktop (if you want to use the online version, you have to pay for it).

To use it is simple.

  1. Download the software at the link above and install it on your Mac.
  2. Open the ImageOptim application.
  3. The interface is similar to what you’d encounter in most other drag-and-drop media management interfaces. Add the images you want to compress to the app.

You’ll then see the percentage of savings you got back by allowing the software to strip out unnecessary data from the files. Nothing else is altered here, so there’s no need to do a file comparison.

17. ImageSmaller

If you’re looking for something really easy to use that handles the compression of both PNGs as well as JPGs, take a look at ImageSmaller.

It promises to reduce your images’ file sizes by up to 90% with just a click of a button. Here is how it works:

  1. Browse for the image file on your computer.
  2. Click the Upload button.
  3. Wait for the tool to generate your compressed image. It will tell you what the new file size and reduction percentage are.
  4. Click on Download File to retrieve your compressed image.

In a side-by-side comparison, you can barely tell the difference between the original and the compressed versions.

18. ResizeImage

ResizeImage is an online tool that lets you resize, crop, flip, and even compress your images. The catch is that it only allows for one image at a time.

Here is how you use this one:

  1. Click on the Upload an Image button. You can use this to resize JPG, PNG, or GIF.
  2. To resize, scroll down to #4 “Resize your image.”
  3. As I explained before, you can resize images with the proportions in place (keep it at scale) or you can release the proportions and create a custom size.
  4. There are also options to add a transparent background, change the output file’s format, and compress the image. Once you’re satisfied with your resizing settings, click on Resize Image.

The amount of file savings you received after resizing the image will now appear at the bottom. If you’re satisfied with the results, you can download your new image.

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