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 * Compressyour image
   * JPEG CompressorThis JPEG image compressor for professionals shrinks your
     images and photos to the smallest filesize possible.
   * JPEG XL CompressorThis JPEG XL image compressor shrinks your images and
     photos to the smallest file size and best quality possible.
   * PNG CompressorThis PNG image compressor shrinks your icons and sprites to
     the smallest file size and best quality possible.
   * GIF CompressorThis GIF image compressor shrinks your image to the smallest
     file size and best quality possible to use as avatar, discord emoji or ad
     banner.
   * WebP CompressorThis online WebP image compressor for professionals
     compresses your image and photos to the smallest filesize possible.
   * SVG CompressorThis SVG image compressor shrinks your SVG logos,
     illustrations or icons to the smallest file size and best quality possible.
 * Analyzeyour image
 * Repairyour image
 * Articlesabout image compression
   * Finally understanding JPGA summary of the JPG compression algorithm in
     layman's terms including 7 tips for reducing the file size.
   * Finally understanding PNGA summary of the PNG compression algorithm in
     layman's terms including 7 tips for reducing the file size.
   * The big image compression tool comparisonUnderstand the technical
     background of online image compression tools and learn which image
     compressor you should use from now on.
   * Better image quality in your Twitter tweetsAn analysis of the image
     compression pipeline of the social network Twitter.
   * The nasty red JPG compression artifactsWhy we see the red compression
     artifacts so well and what we can do about them.

 * Login


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

JPEG XLCompressor

Converts your image files into the next-generation image format JPEG XL 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

Repairyour image

Repairs and fixes your corrupted and broken PNG images.

Repair your image

 * Made in Germany
 * EU GDPR compliant


WHAT PROFESSIONALS ARE SAYING …

> COD helps compress hero banner images on our website and blog posts. The size
> reduction function helps us keep quality image resolution and reduce page
> loading times, thereby improving UX on our website.
> 
> Esther, Director at Exodus Beauty

> Christoph's image compression tool is just brilliant. I have been using it for
> many years to reduce the filesize of my web graphics and photos. His knowledge
> about image compression is absolutely stunning. If you thought your image size
> is already small give compress-or-die a try. You will be impressed.
> 
> Timo "Ostrich" Strauß, Creative Online Marketer at dreieck.com

> As a luxury brand, high-quality images are a must in our communications.
> Nevertheless, low loading time is one of the biggest factors for good UX.
> That's why we've been using compress or die since the beginning of the year to
> guarantee both.
> 
> Tilman Werthschulte, Online Marketing Manager at DEDON GmbH, Luxury Outdoor
> Furniture

> Whenever you need to crush your file down, especially PNGs I am using
> compress-or-die. It is very useful when you have to fulfill strict file-size
> requirements.
> 
> Elmar Kirschner, Team Lead Digital Campaigns at .NFQ | Digital Creatives

> I've been building conservation-oriented websites for over ten years. The
> difference between this site and all the others I had used is incredible! The
> bars allow me to fine-tune compression levels and work to find the perfect
> compression level before hitting that download button. And the quality is
> incredible!
> 
> Jon Hakim, Web Developer at wildcolumbia.org

> CoD is one of my favorite production tools! The granular controls found in
> »expert mode« are critical for getting that perfect balance of quality and
> file size. Thank you SO much, Christoph!
> 
> Tom Miller, owner of digital production company Creative Ocean, Inc.

> We build HTML5 banner paid media campaigns for video game and movie releases.
> We use Compress-Or-Die for all of our Jpg compression because the output is
> the best. Period. Lower file size without lower image quality helps us create
> better ads.
> 
> David, owner of digital production company Department 5

> Absolutely amazing compression. Never before have I had so much control over
> the compression and had such great compression results. Cannot but recommend.
> 
> Kevin, irritable bowel syndrome coach at AnatomyFix

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VIDEOJPEG QUALITY IN A NUTSHELL



Ben from Compress-Or-Die explains the two quality sliders in the JPEG
compressor, their meaning, and how the human eye perceives brightness and color
information differently.

He also discusses the quantization table, which determines how much an image is
compressed, and how the formula used to calculate the table can differ between
programs or online services.

6 min view

View video


ARTICLETHE NASTY RED JPG COMPRESSION ARTIFACTS



During an exchange with an illustrator about another article, he asked me why
the JPEG format is so bad at handling the color red. As an explanation, I have
already run across several variants. So I simply answered the questions with the
variant that seemed most plausible to me.

But was that really the right answer? And if we knew the right answer.... then
can't we do something about it?

15 min read

Read article


ARTICLEBETTER IMAGE QUALITY IN YOUR TWITTER TWEETS



Every now and then I come across tweets where users are upset about the lousy
quality of their posted images after Twitter compresses them and doesn't speak
well of Twitter.

But is the quality really that bad? Does Twitter really not care about image
quality? Is Twitter trying to save storage space on its servers at all costs? Or
are the users themselves to blame and have already uploaded their images in poor
quality?

I took a closer look at what Twitter actually does with your images in the
tweets.

18 min read

Read article


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

Read article


ARTICLEFINALLY 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.

22 min read

Read article


ARTICLEFINALLY 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.

15 min read

Read article


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.

Thank you very much!

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

 * Thomas
 * Nic
 * Jeff Gilbert
 * Orthnell Tino Cash
 * David Tomlinson
 * Adam Lidster
 * Stephen F Babbitt
 * sandraballe@aol.com

Become a patron
 * Patrons are highlighted here
 * Patrons do not see ads
 * Patrons have doubled upload limit
 * Patrons can use batch processing

News

Check out our Reddit channel if you want to comment on the news.

--------------------------------------------------------------------------------

Image compression with AI
2023-06-25

Wow! Google researchers have now proposed a new method that combines a standard
autoencoder with a diffusion process to recover and add fine details discarded
by the autoencoder. Interesting to see the possibilities AI opens up when
compressing images.

MarkTechPost
How Should We Store AI Images? Google Researchers Propose an Image Compression
Method Using Score-based Generative Models - MarkTechPost
A year ago, generating realistic images with AI was a dream. We were impressed
by seeing generated faces that resemble real ones, despite the majority of
outputs having three eyes, two noses, etc. However, things changed quite rapidly
with the release of diffusion models. Nowadays, it is difficult to distinguish
an AI-generated image from a […]

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Stability issues
2023-05-11

For about a week, there have been stability issues that have caused COD to be
temporarily unavailable. I will continue to monitor and analyze the problem.

--------------------------------------------------------------------------------

Downtime of the page due to the shutdown of the Twitter app
2023-04-29

Perhaps you have noticed. The site was down for a day. What passed me by was
that Twitter ended free access to the API, and without mail announcement stopped
all apps that didn't subscribe to the Basic account for $100 USD. 😡 So I had to
rebuild the news system without Twitter at short notice.

Now everything should be up and running again and I can get back to cool new
features.

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JPEG quality in a nutshell
2023-03-30

Not quite sure if the settings options in Compress-Or-Die are really well
understood. 🤔 That's why I created a video explaining the two quality sliders
in the JPEG Compressor as a test. I am curious about your feedback.

YouTube
JPEG Quality in a nutshell - YouTube
Ben from Compress-Or-Die explains why there are two quality sliders in the JPEG
compressor and what they mean. He discusses how the human eye perceives brigh...

--------------------------------------------------------------------------------

New Reddit channel
2023-03-21

Just a little update. Firstly, I have started a Reddit channel and would like to
try out with you whether we can get a lively exchange there. I would be happy.

On the other hand, a lot has happened under the hood of Compress-Or-Die, which
should provide minimally better results here and there. For example, it is now
possible to convert a JPEG lossless into a JPEG XL (thanks to Ted for the idea).
Also all used binaries like mozjpeg, cjxl, svgo and others have been updated.

Happy compressing.

www.reddit.com
Reddit - Dive into anything

Image tools
 * JPEG Compressor
 * JPEG XL Compressor
 * PNG Compressor
 * GIF Compressor
 * WebP Compressor
 * SVG Compressor
 * Analyze your image
 * Repair your image

Articles
 * Finally understanding JPG
 * Finally understanding PNG
 * The big image compression tool comparison
 * Better image quality in your Twitter tweets
 * The nasty red JPG compression artifacts

Service
 * Feedback
 * FAQ
 * API
 * Privacy policy
 * Impressum

Handmade with by Christoph Erdmann

Okay

News
Image compression with AI
2023-06-25

Wow! Google researchers have now proposed a new method that combines a standard
autoencoder with a diffusion process to recover and add fine details discarded
by the autoencoder. Interesting to see the possibilities AI opens up when
compressing images.

MarkTechPost
How Should We Store AI Images? Google Researchers Propose an Image Compression
Method Using Score-based Generative Models - MarkTechPost
A year ago, generating realistic images with AI was a dream. We were impressed
by seeing generated faces that resemble real ones, despite the majority of
outputs having three eyes, two noses, etc. However, things changed quite rapidly
with the release of diffusion models. Nowadays, it is difficult to distinguish
an AI-generated image from a […]

--------------------------------------------------------------------------------

Check out our Reddit channel if you want to comment on the news.

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