Compress-Or-Die
The most advanced free online compressor used by professionals to reduce the file size of their images to a minimum. Compare it now with any other app.
Articles
The big image compression tool comparison
There are a lot of articles about online image compression tools in the net, most of them are very superficial. Usually they end with a simple: "It generates smaller pictures, so it's got to be better."
Learn why such statements are most of the time meaningless, understand the technical background, and find out which tool you should use as of today.
Finally understanding JPEG
If you always wanted to know how the JPEG compression works under the hood I want to recommend this article to you. It was important to me to write an article that is reasonable for every level of understanding.
Furthermore it contains 7 valuable tricks to reduce the file size of your JPEGs by exploiting the technical functionality of the JPEG compression algorithm.
Finally understanding PNG
Ever wondered why some of your PNGs are of large file size while similar PNGs are so small?
Since this question comes up so often, I have written a follow-up to my article "Understanding JPEG" to explain the bare necessities of the PNG compression algorithm in layman's terms.
At the end you will also get 7 tips on how to get your PNGs to a REALLY small file size.
That's me
Hi! I’m Christoph, working as a programmer/developer in Bielefeld/Germany.
Since I was building an advertising tool, I had to learn a lot about image file formats and compression.
This tool is some kind of a by-product and turned out to be my sweet little baby. So have fun using it! I hope it will help you as much as it does for me.
Image Compression News
Just switched compress-or-die.com to HTTP/2, which caused a little hiccup. Now everything should work normally again. If you notice something, please write a line. #perfmatters
Hey web folks and devs, did you know that compress-or-die.com/jpg can create transparent JPEGs with very little help from Javascript. Saves enormous bandwidth compared to a PNG32. Ingenious for pack shots e.g.
Since AVIF is currently preparing to become the sole ruler of the bitmap scene... do you plan to use it? In what environment? Do you know AVIF at all? What do you think about it? #webperf #webperformance #perfmatters
At the moment there is a server move of COD running, as a result of which I don't get any feedback mails at the moment. If you want to tell me something, please reply to this tweet.
Was just a missing Reverse-DNS-Entry. Everything should now run smoothly again. Mails have not been lost either.
