Various compression software for PNG images in iOS development, and comparison of compression ratios

Comparison of various compression software:

http://jamiemason.github.io/ImageOptim-CLI/comparison/png/photoshop/desc/

The compression rate is Imagealpha lossy compression plus Imageoptim lossless compression, the two need to order,

In case of trouble, a small number of images can also be used online tools: tinypng

This tool has an API, but there are restrictions, each key 300 times a month, and more will be charged

Imageoptim

Go to official website

Lossless compression, GUI + command line (GUI software also available)

With this tool, you need to turn off the image compression feature of Xcode, otherwise Xcode will compress the image and add

Xcode settings See tutorials

Command line:https://imageoptim.com/command-line.html

Include

• PNGOut
• Zopfli,
• Pngcrush,
• Advpng,
• OptiPNG,
• Jpegoptim,
• Jpegrescan,
• Jpegtran,
• Gifsicle.

Imagealpha

Go to official website

lossy compression, after completion, then use the above Imageoptim to re-compress the effect better

GUI + Command Line

Include

• Pngquant, see below.
• Pngnq-s9

Pngquant

Go to official website

Command line, a lot of software integration, lower level.

http://pngquant.org/

Software that integrates this command, include:

GUI

• Imagealpha, as on-mac OS X GUI for pngquant and other tools
• Superpng Photoshop Plug-in-mac and Windows. Comparison with ' Save for Web '
• Pngoo-windows GUI for batch Conversion
• Pngyu-mac OS X and Windows GUI with batch processing option
• Tinypng and Kraken.io-on-line interfaces for Pngquant

Command-Line Download link

• Binary for Mac OS X (v2.3.3)
• Binary for Windows (v2.3.1)
• Package for Debian testing Important:don ' t use version 1.0-4.1 from Debian stable! Only install the 2.0+ from "Jessie".
• Various Linux packages, RPM spec
• Latest source Code as Tarball (to build in other platforms)

Trimage

Go to official website

Cross-platform, GUI + Command Line

Trimage is a cross-platform GUI and command-line interface to optimize image files for websites, using OptiPNG, Pngcrush, Advpng and Jpegoptim, depending on the filetype (currently, PNG and JPG files is supported). It is inspired by Imageoptim. All image files were Losslessy compressed on the highest available compression levels, and EXIF and other metadata is Remov Ed. Trimage gives various input functions to fit your own workflow:a regular file dialog, dragging and dropping and V arious command line Options.

include:

• OptiPNG,
• Pngcrush,
• Advpng,
• Jpegoptim,

Kraken

https://kraken.io/

Online compression, charge, support trial

Tinypng

https://tinypng.com/

Online compression, charge, support trial

Various compression software for PNG images in iOS development, and comparison of compression ratios