Use the most advanced image compressors for free

Trusted by professionals around the globe to compress their images to a minimum. Compare these tools with any other app.

JPEGCompressor

Converts your lossless PNGs or high quality JPEGs into lossy JPEGs with the smallest filesize possible.

Compress your image

PNGCompressor

Converts your lossless PNGs or high quality JPEGs into lossy PNGs with the smallest filesize possible.

Compress your image

GIFCompressor

Converts your GIFs into lossy GIFs with the smallest filesize possible.

Compress your image

WEBPCompressor

Converts your lossless PNGs or high quality JPEGs into lossy WebPs with the smallest filesize possible.

Compress your image

SVGCompressor

Converts your SVG vector files into SVGs with the smallest filesize possible.

Compress your image

Analyzeyour image

Gives you a lot of information found in the given image (JPEG, PNG, WebP, GIF and SVG).

Analyze your image

What users are saying …

ArticleThe 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.

18 min read

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ArticleFinally understanding JPEG

Image of man painting with color

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.

22 min read

Read article

ArticleFinally understanding PNG

Boy laughing when understand something written in a book

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.

15 min read

Read article

That's me

Christoph Erdmann

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.

Thank you very much!

With their great support, the following patrons ensure that Compress-Or-Die is kept alive.

Become a patron
News

My favorite part of this very good blog post is where Tim cites this chart and infers that “everything else” is mostly images. We know ~half of the web's bandwidth is images; apparently ~½ the web's memory use is images, too! https://t.co/nO3A4O9W2s https://t.co/qnGm4kA64t

My favorite part of this very good blog post is where Tim cites this chart and infers that “everything else” is mostly images. We know ~half of the web's bandwidth is images; apparently ~½ the web's memory use is images, too! twitter.com/tkadlec/status…

2021-06-1715Bellingham, WA

Just for information: Today there was a longer (about one hour) break at Compress-Or-Die, because I added two more CPUs due to the load. Including the backup snapshots it took a bit longer than expected. But now we can continue with more power. 💪 youtube.com/watch?v=j1BNcS…

2021-06-1213Bielefeld, Germany

Thanks to your image submissions of images that can't be compressed in Compress-Or-Die, I was able to eliminate two more bug cases. First, much more abstruse GIFs can now be compressed, and second, animated WebP files no longer cause problems. Thanks for your great support! 👌

2021-06-0907Bielefeld, Germany

I'm so excited. Over 500 pages on what to look for when optimizing and compressing images for the web. Wow, @addyosmani https://t.co/i7385hXwvd

I'm so excited. Over 500 pages on what to look for when optimizing and compressing images for the web. Wow, @addyosmani

2021-06-05869Bielefeld, Germany

I am looking for small GIFs (under 500kb) which cannot be compressed by compress-or-die.com and throw errors. If you have any, please send them to me. Feel free to contact me at compress-or-die.com/Feedback or reply to this tweet.

2021-05-2322Bielefeld, Germany
News

My favorite part of this very good blog post is where Tim cites this chart and infers that “everything else” is mostly images. We know ~half of the web's bandwidth is images; apparently ~½ the web's memory use is images, too! https://t.co/nO3A4O9W2s https://t.co/qnGm4kA64t

My favorite part of this very good blog post is where Tim cites this chart and infers that “everything else” is mostly images. We know ~half of the web's bandwidth is images; apparently ~½ the web's memory use is images, too! twitter.com/tkadlec/status…

2021-06-1715Bellingham, WA