Lossless Image Compression Tool

Question

Running Google Page Speed ​​on a public site, I saw several suggestions for this tool, for example:

Without loss of compression http://g-ecx.images-amazon.com/images/G/01/electronics/detail-page/Acer-120x120._V137848950_.gi can save 4.8KiB (reduction by 26%), and also provide link to optimized content. But they do it based on the image. After compression, I saw a significant reduction in file sizes. So the question is:

Is there any tool or web service that I can use so that I give it a catalog of uncompressed images (say .gif) and it returns me a catalog of images with all their compressed?

I found a somewhat related question about SO here , but this is not an exact duplicate.

Thank you for reading.

Answer 1

On Mac, I had a good success with ImageOptim . It processes PNG, JPEG and GIF files in the mode of "drape" and "drop", and can also process whole directories. It is also available as open source and available in several languages.

On Windows, I used PngOptimizer and PNGGauntlet . Unlike ImageOptim, these programs convert other formats to PNG, so if your goal is to reduce GIF or JPEG and stay in this format, this will not be an option.

You can also try the smush.it Yahoo website / service, which can handle individual file downloads as well as the zip directory.

Answer 2

The best tool for lossless image compression for the Internet (JPG, PNG and GIF) - FileOptimizer . Sometimes it can compress images up to 10% of their original size. Some of the best online tools are this compressor for PNG and this for JPG.

I would go with FileOptimzer if you have a lot of images. If you have only a few, it’s easier to use online tools.

Answer 3

GIF, PNG and even lossless JPEG optimization are possible. Because these formats contain sufficient redundancy. Regarding the PNG format, I am using a cryopng script. You can find some other compression related stuff in here .

Answer 4

I recently started using lossless Jpegoptim ( GitHub ), and I get better results with this tool, very often close to Google Page Suggestions of speed, and sometimes even better.

I am on Linux, so if I go to the image folder, I just use this command to compress all the images:

jpegoptim *.jpg -s 

Or use this if you want to compress only a specific image:

 jpegoptim image.jpg -s 

Basically, it selects all the markers from the output file, which sometimes can reduce the image size even by 50%! Image quality remains unchanged.

Answer 5

I am currently using highcompress , and this is my favorite because the best part is quality and size. I have compared with many online tools, and in most cases it gives better compression and better quality, so now I don’t go here and there and use it directly. If any other is better you know, kindly share