5 Best Offline Image Compression Tools

Images are very important for a website to gain and retain the attention of the users. Without them, a website seems dull. On the other side of the benefits of images, they make web pages heavy, thereby the load time of web pages get increased. The load time is a decisive factor in search engine ranking, which broadly depends on the weight of the page and the number of HTTP requests made to the server. Some more factors are also there behind page speed, though. In our last post, we have provided some simple tips to speed up a website. One of those is to use optimized images on the website. The optimized images take less space as well as less bandwidth. Hence, the website takes less time to get loaded.

The photographs taken with modern high quality cameras come with high definition (big image files), which are not suitable to use on the web pages as it is. Compression makes the image file size reduced, hence, optimized for website. Following we are telling you about 5 image compression tools that compress images without diminishing their visual quality.

1. Caesium Image Compressor

caesium image compressor

Compatible with windows, this is a free and open source image compressor. You can compress PNG, JPG, JPEG and BMP images. It provides the flexibility to choose the compression level for your images. In case, you are not sure that what compression level is good for your images, you can see compression results of choosing different compression levels. Plus, it gives the comparison preview of originally uploaded and compressed images. The caesium will also let you know that how much space you’ve saved due to compression.

2. PNG Gauntlet

PNGGauntlet image compressor

This tool is specialist of optimizing PNG files and is available for windows. It is also suitable to convert GIF, JPG, TIFF and BMP image files into PNG format. To get the possible smallest PNG images, it unites PNGOUT, OptiPNG and DeflOpt techniques. A very simple tool to use, it has not many options for setting preferences. You simply load the images for compression, and see the original and compressed size of your images side by side in real time.

3. PNG Optimizer

PNGOptimizer image compressor

Yet another PNG image optimizer on our list is PSYDK’s PngOptimizer. This application significantly reduces the weight of PNG files to make them able to download at fast speed. Even, it can optimize animated PNGs. It can also convert BMP, GIF and TGA images into PNG images. This application is available in two variations: Windows x64 (64 bits) and Windows x86 (32 bits).


RIOT image compressor

Radical Image Optimization Tool (RIOT) can optimize your JPEG, GIF, and PNG files. It gives flexibility to upload files in batch mode. It will let you determine the number of colors, contrast, brightness, gamma, invert and metadata settings for the images you want to compress. Hence, it is up to you whether you want to keep or want to stripe the comments, IPTC, Adobe XMP, EXIF profile, and ICC profile from your image(s). The common tools like pan, zoom, rotate and flip are also found in its interface. With this tool, you can resize your images as well. For this, it supports different filters like Lanczos3, Catmull Rom, and others.

5. File Optimizer

FileOptimizer image compressor

The File Optimizer can compress almost any file format. It has a simple interface, in which you can add files simply by dragging. In the columnar format, you can view original and compressed file sizes with relative percentage size of compressed image. For reducing the file weight, it removes unnecessary metadata and other information.

Which Image Compressor to Pick?

One way to pick a tool is to compare the options you can avail from each tool. Another is to compare the size and quality of compressed images obtained from each one. Let us make the first task easier for you. So, as per number of options and control over compression, the Caesium and the RIOT are go to applications. Both give more compression settings. As per quality of compressed images, all tools are worthwhile.

Have you already worked with any of these tools? Chime in your thoughts about that. You can also tell us if you use some other worthwhile application for image compression.