7+ excellent image optimization tools

Original author: Jacob Gube
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Translation of article 8 Excellent Tools for Optimizing Your Images
Unfortunately, at the time of translation, one of the services stopped working. But the Khabrovsk citizens have suggested many more good solutions!

One of the easiest ways to reduce the response time of pages on your site is image optimization.

There are several free tools to help reduce and optimize images. In this article you will find convenient tools for creating pictures for the web as small in weight as possible.
Overview of tools - under the cut.

1. Smush.it!

Smush.it uses optimization methods for a specific image format to remove unwanted bytes from image files. It is a lossless optimization tool, which means it optimizes the image without changing the appearance or visual quality. Smush.it runs on a web page. The application reports how many bytes will be saved by optimizing the image of the pages and provides a downloadable Zip file with the processed files.


RIOT is an acronym for Radical Image Optimization Tool. Image Optimizer for Windows users, which is available as a standalone application or as an IrfanView extension. The application supports JPG, PNG and GIF files and is able to cut the image metadata to further reduce the file. It also has utilities that allow you to perform basic types of image editing, such as scaling and rotation and reflection.


PNGOUT is a public, free, no-frills tool for optimizing your images. PNGOUT can be launched from the Windows command line or the Run dialog box. It has a wide selection of settings for file compression methods. Most of the popular image file formats (such as JPG, GIF, and PNG) are supported.

You can add the / zl121 switch to pngout for compatibility with old png parsers.
To repack jar, you can use kzip with the same key / zl121.

Both pngout and kzip were written by Ken Silverman.

4. Online Image Optimizer

Dynamic Image Online Image Optimizer is a web-based image compression tool. You can specify a link to the image that you want to optimize, or download it from a local folder. In addition to optimization, you can choose the type of the resulting file (by default, the same file type is obtained). There is a file size limit of 300 KB.

5. SuperGIF

SuperGIF is a free utility for Windows and Mac OS that helps optimize GIFs. It has an intuitive and simple user interface, can compress GIFs by 50% or more. In the free version, you can optimize only one image at a time, but otherwise it has the same functions as the commercial version ($ 29.95), with the exception of batch processing.

6. PNGGauntlet

PNGGauntlet is a .NET application for PNGOUT. It can be used to convert JPG, GIF, TGA, PCX, BMP and optimize the contents of PNG files. PNGGauntlet is ideal for those who are not used to working through the command line, but still would like to use the improved PNGOUT optimization algorithm.

7. SuperPNG

SuperPNG is a free plug-in for Photoshop that allows you to save PNG in a much more compact form. It also includes some advanced features, such as support for 16-bit color, variable compression, gamma correction, and metadata.

PS And now - what the Habrovsk residents advised.

8. Pngcrush (thanks UUSER )

There is no picture , since this plugin works from the command line. Works in UNIX, LINUX and also in MS-DOS.
Optimizes PNG. Uses various compression methods, can remove unwanted auxiliary blocks.
Pngcrush is open source.

9. OptiPNG (thanks to Razunter )

OptiPNG - as the name implies, the PNG optimizer. This program also converts other formats (BMP, GIF, PNM and TIFF) into optimized PNG, and performs integrity and patch checking.
It is open source, distributed under zlib / libpng license.

10. punypng (thanks to Razunter )

Web service for PNG, JPEG and GIF compression.
From the latest updates:
Preview the quality of the final image.
Removing your image from the server after 15 minutes after conversion.
Support for transparency.

11. ImageOptim (thanks to Conquearse )

Application for Mac-OC. Handles PNG, JPEG and GIF animations.
ImageOptim combines various optimization tools: AdvPNG from AdvanceCOMP, OptiPNG, Pngcrush, JpegOptim, jpegtran from Libjpeg, Gifsicle and optionally PNGOUT.
Open source on GPLv2.
Supports convenient drag'n'drop images to your window.

12. pngre (thanks homm )

The graphics optimizer in PNG format. Also converts GIF and BMP to PNG.
Allows you to finely manually or automatically adjust the size of the PNG file.

13. pngquant (thanks homm )

It works from the command line. It can only do one thing, it converts 32-bit PNGs with alpha transparency into 8-bit palette PNGs with alpha transparency. But it does it very well, much better than Fireworks, although it is also not without problems.

14. PictureBeaver (thanks Carl_Linnaeus )
Optimization example:

Author - Artyom Sapegin
PictureBeaver automatically optimizes web graphics (in PNG, GIF and JPEG formats), removing auxiliary data from files that do not affect the display. Usually you can achieve a reduction in file size by 10-30%.
GIF without animation is converted to PNG if such files go less. For optimization, the free utilities OptiPNG, jpegtran and Gifsicle are used.

15. Color quantizer(thanks to Subdivision )

Color quantizer is a small program that makes it easy to optimize images for the web.
Key features:

converting to an arbitrary number of colors
png8 recording support with transparency; the
ability to set a quality mask for important areas;
convenient palette editing;
automatic selection of optimal parameters for PNGOUT

16. Gifsicle (thanks AndrewTishkin )

This is a tool for GIFs. Mostly for different UNIX. It is also ported under Win, but this version is not supported.
Example bar:
Crop transparent frames:
gifsicle --crop-transparency src.gif> dest.gif

Compressing animated (simple, too, can be ... a few bytes :) GIF:
gifsicle -O2 src.gif> dest.gif

17. jpegtran (thanks AndrewTishkin )

And this is for JPEG. The official program from the Independent JPEG Group.

18. Webify (Thanks to zeka ) A

shell for free console utilities is pngout, jpegtran, gifsicle, which without changing the quality of images remove unnecessary meta-information and use additional compression algorithms.

19. PngOptimizer (Thanks Enot_23 )

Very convenient optimizer for Windows.
Compresses PNG, convert to PNG from BMP, GIF, TGA. Allows you to take PNG screenshots.

20. TweakPNG ( Thanks stalkers )

TweakPNG is a low-level utility for studying and modifying PNG files. For Windows 2000 or higher. In order to use it, you need to understand at least a little bit in PNG format.
According to stalkers, it helps a lot with PNGs saved in Photoshop CS2. The fact is that Photoshop versions below CS3 add all the garbage to the file, incl. and dimming data. As a result, in IE the image looks darker than in other browsers, because all others read only the picture directly.

Using the utility, you can simply delete it. You can also throw comments like "edited in Adobe Photshop". In addition to getting rid of glitches, we also get a small gain in size.

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