PNG Image Compressor

This PNG image compressor shrinks your icons and sprites to the smallest file size and best quality possible.

  • Made in Germany
  • EU GDPR compliant

  1. For best results use high quality source material that hasn't been compressed before.

  2. Drag & Drop

    Drag your image file onto this website. You can do this anytime.

  3. Paste image URL

    Paste an image URL from your clipboard into this website. You can do this also on the image processing page.

  4. Paste Base64 Data URI

    Paste a Base64 Data URI from your clipboard into this website. You can do this also on the image processing page.

  5. Paste image data

    Paste an image from your clipboard into this website. You can do this also on the image processing page.

  6. Use this Photoshop JSX-Script

    Use the script to send an image from Photoshop to compress-or-die.
    Copy it to the Photoshop Scripts folder. Overwrite what’s there if you’re asked.
    Windows: C:\Program Files\Adobe\Photoshop CS...\Presets\Scripts
    Mac OS X: Applications/Photoshop CS.../Presets/Scripts
    Restart Photoshop.

Allowed file formats: JPEG, PNG, GIF, WebP, SVG (max. 8 MiB)

Features

  • State-Of-The-Art PNG compression algorithm
  • 8 bit and 24 bit PNG output
  • Fuzzy whitespace trimming
  • Lossless auto-rotation based on EXIF meta data (on JPEG input)
  • Selective Blur preprocessing
  • Clean color space conversion from CMYK
  • Converts to standard color profile sRGB-IEC61966-2.1
  • Gamma correction to 2.2
  • Compression view
  • For the technical enthusiats: Uses imagemagick, pngquant, zopflipng, posterize, exiftran, puppeteer and a lot of custom code.

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Why should I use this PNG compressor?

PNG image files are lossless compressed and therefore very suitable for archiving images for later processing as 24-bit or 32-bit PNG. Also on websites and in apps, 8-bit PNG image files in particular are used as sprites and icons due to their transparency capability.

However, since the conversion of images with a large number of colors to an 8-bit PNG inevitably results in the loss or combination of colors, other compressors, which do not offer any settings, always use 256 colors in the compressed image. This is the maximum number of colors allowed in an 8-bit PNG and therefore poses the least risk to the compressors of making the final result unsightly.

But to get the most out of a PNG, you need a preview. Then you can reduce the colors much further and be sure that the color count is still sufficient. Thus you reduce the file size still far below what other compressors produce by their automatic compression.

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

News
Christoph Erdmann
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.

How Should We Store AI Images? Google Researchers Propose an Image Compression Method Using Score-based Generative Models - MarkTechPost
MarkTechPostA 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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