Image compression without loss of quality

Users are often annoyed by the slow loading of web pages. To speed up the process, site owners change the size of the images. Compressing images allows you to save space on the server and reduce the consumption of traffic. The smaller the image, the better for the service.

Can I compress images without losing quality? The result depends on the graphic source. Some photos can only be reduced by 100 bytes. Usual images from the Internet are recommended to be compressed by 40%.

Pictures should not be lost in quality. Image compression should be performed in special applications. In this review, the best programs for image reduction will be considered.

AdvanceCOMP

This is an obsolete application with command-line support. The utility is unlikely to appeal to users who are used to working with the GUI. There is no reference information. Image compression is done by introducing a simple line for% a in (path to the image file) do advpng -z -4 "% a. If the user has already worked with the command line, it will be easier for him to master the program.

After the end of the image compression process, the finished files will replace the original images. The quality of the pictures will remain the same. The result of compression may disappoint the user. The size of the picture in PNG format will decrease only by 14.2%. The program can be used in combination with other utilities to optimize images.

Cesium

A simple open source application used for compressing images in PNG, JPG and BMP formats. The program interface is simple and straightforward. To add the desired images, click the Add button. In the window that opens, you must select images and specify a folder to save the results.

Then click on the Compress button. Compression of pictures for the site will be executed by the program in a few seconds. The developers did not provide the opportunity to optimize images without losing quality. The utility simply recodes the files using the user-specified parameters.

When working with the program, the user will encounter some limitations. The application allows you to receive only 24-bit files. When using other formats, the weight of the image increases. The size of the image is reduced by only 1.2%. If the user is not satisfied with the result, he may refuse to save the file.

FILEminimizer Pictures

The program uses a radical approach to image optimization. The user has the option to change formats, zoom the photo, delete metadata, transcode JPEG files, taking into account the need to change the weight of the picture. The application is built in a familiar format. After selecting the source file and the destination folder, it remains to make one click. Picture compression program performs very quickly.

The result depends on the photo format. The user can compress the weight of the JPG image to 40%. Optimization of PNG-file gives no more than 28,8%. At compression GIF it is possible to reduce weight of a picture only on 16,5%.

FileOptimizer

The application performs optimization of images, executable files, archives, MS Office documents, PDF and many others. The program has one of the simplest and clearest interfaces. The user just needs to drag the images into the utility window, right-click the computer mouse and select the "optimize" item. Source files will be replaced with new ones. The original versions of the images are moved to the trash.

If necessary, the user can restore the files. FileOptimizer is the best program for compressing images in PNG format. Images can be reduced by 42.2%. Optimization of images in the format of JPEG and GIF gives no more than 17.7% and 15.9% respectively. The user can also compress other files on his site.

ImageOptim

The program is created for computers running Mac OS. The application compresses images, and also acts as a wrapper for other utilities. The program allows you to delete descriptions and color profile. The quality of images after compression remains the same. Recoding files is not performed.

In order to optimize the image, you should drag it to the utility window. The program for image compression does not work as fast as we would like. This will not be a problem for users downloading only 5-10 pictures to the application.

Files in GIF and PNG format can be compressed by 17.8%. JPG-pictures can be reduced by 18.3%. The application is suitable for users who need a stable and simple tool.

JStrip

The program allows you to remove all unnecessary information: thumbnails, descriptions, color profile, unnecessary bytes at the beginning of files, etc. You can not expect a significant compression of pictures. Since the transcoding is not performed, the image quality remains the same.

Photos with high resolution can only be compressed by 1%. Small pictures can be reduced by 16.1%. You can not call the application ideal. The program replaces the original images with new images.

OptiPNG

Compression of WordPress images is performed using the command line. The detailed instructions describe all the functions of the utility. PNG images can be reduced by 32.2%. The tool is recommended to be combined with other programs.

PNGGauntlet

The application has a simple graphical interface. The program can act as a wrapper for other utilities. When compressing, three tools are simultaneously used. Therefore, the process of image optimization can be delayed. 25 images in high resolution are processed 1 hour.

The application gives excellent results on compression. The utility reduced 50 PNG files by 41.3%. But is it worth the wait? Everyone decides for himself. Users who need a tool for qualitative optimization of PNG files will accurately include the program in the list of used utilities.

RIOT

This is the only free application offering to install unnecessary modules. If the software advertised by the developers is not interesting to the user, then it can remove the checkmark from the corresponding items. The application has a clear interface. A multi-threaded process allows you to process several pictures at once. If necessary, you can compare the results with the originals.

The program reduces the number of colors in photos and performs the conversion of JPEG into a picture with low quality. After processing, some files may become larger in size. Therefore, you need to check the results. It should be noted that the application works well with GIF files. Animated images can be compressed by 42,8%.

PNGOptimizer

The size of the application is 146 KB. The program has a primitive interface. The utility compresses images in PNG format. The application eliminates interlacing, replaces the background color and deletes the text. The program imports GIF, BMP and TGA-files and saves them as PNG-images.

By efficiency, the application is inferior to other utilities. PNG images can only be compressed by 3.6%. Usual images from the network can be reduced by 40%. Users looking for a small and simple solution for working with PNG files are advised to pay attention to this application.

JPEGmini Lite

The program compresses the images in two stages. First, the application determines which part of the image can be reduced without losing quality. A sophisticated processing algorithm is used. Then the JPEG encoder compresses the image. The picture quality remains practically the same.

To start the process, drag photos to the utility window. Original pictures will be replaced with new images. In the free version it is allowed to compress no more than 20 pictures a day.

The results depend on the original photos. Images with high resolution can be compressed by 71.3% without significant quality loss. Simple JPG pictures can only be reduced by 8.2%. The larger the image size, the better the compression quality.

ScriptPNG

This is a command-line tool. The program optimizes PNG files. To compress a picture, you need to drag it onto the utility file itself. A command prompt appears. The user will be prompted to choose one of nine methods of compression.

Here you need to specify the appropriate option. The application closes. Processing of the files starts. Original photos will be replaced with new pictures. When the program runs, there may be problems with the installer, so you should manually close the error messages.

Images in PNG format can be reduced by 40.1%. If the user wants to add other options, he can edit the script file himself.

conclusions

The best results are provided by FileOptimizer. With its help, you can achieve 42.2% compression of PNG images. The application also works fine with JPG and GIF files. If the user does not like this option, then he can look at the ScriptPNG utility. ImageOptim shows good results when working with JPEG and GIF images.