18个图片压缩工具提高站点访问速度

2015年1月12日 发表评论 阅读评论

With page speed a ranking SEO factor and consumers expecting exceedingly fast web experiences, it's
crucial to get aggressive and take control of your image sizes to
deliver a faster loading website to your users.

Image compression is either lossy or lossless: Lossy works by
discarding information from the original file, and lossless retains all
the original data (though, the file size tends to be bigger). There's a
variety of image compression algorithms that take different approaches
to reducing file size, and the tools listed below utilize a number of
those to minimize the size of your images.

Whether it's JPEG, PNG, GIF or SVG, we've got you covered with this
selection of 18 free, premium, online and desktop-based image
compressors. All of them will help you compress your website's images,
save bandwidth and improve your site's performance.

1. JPEGMini

1-JPEGMini

JPEGMini can help reduce the file size of your photos up to five
times smaller, while keeping their original quality. It's available for
Mac OS X and Windows as a desktop app, available as a free (limited) or a
paid version.

To use JPEGMini, simply choose or drag folders to the app for it to
optimize each image automatically. It also offers a server package,
which enables you to lower your storage and bandwidth costs by reducing
the load time of image-intensive web-pages.

Price: Free; Paid Version $19.99

2. Shrink O'Matic

Shrink O'Matic is an Adobe AIR application to batch and resize images
easily, handling JPGs, GIFs and PNGs. Drag and drop images into the app
and they will be resized. You can customize the settings and choose the
output sizes, rotation, name, location, format and watermark. It
supports EXIF data so you won't lose any information once the images are
processed.

Price: Free

3. Smush.it

Smush.it is an online service from the Yahoo! Developer Network that
optimizes your images. It uses lossless compression techniques, so the
file size is reduced without changing the look or visual quality of the
image.

The uploader supports JPEG, GIF and PNG files with maximum sizes of
1MB. The optimized results are available for download from a temporary
URL, which is valid for up to 30 minutes afterwards.

Price: Free (online uploader)

4. RIOT

RIOT (Radical Image Optimization Tool) is a free program to optimize
images for the web efficiently. It includes an easy-to-use interface to
compare the original with the optimized image in real time, so you can
instantly see the resulting file size.

The program is lightweight, fast and boasts powerful features for
more advanced users. It supports various formats and features automatic
optimization that selects the most suitable format and parameters.

Price: Free

5. Image Optimizer

Image Optimizer lets you resize, compress and optimize your images,
and it's available as either a free online service, a free desktop
application or as a paid upgrade to remove the promo text at the bottom
of optimized images.

It's simple to use and allows you to choose the resulting
optimization quality, max width and max height. You can compress images
in bulk and view the progress of the optimization.

Price: Free; ~$50 to remove promo text

6. PNG Gauntlet

6-PNGGauntlet

PNG Gauntlet lets you optimize PNG files and is available for Windows. It combines PNGOUT, OptiPNG and DeflOpt to create the smallest file sizes possible, with no reduction in image quality.

The program converts JPG, GIF, TIFF and BMP files to PNG, and gives
individual progress bars for each file, highlighting the file that is
currently compressing, and a status bar to keep track of the total bytes
saved.

Price: Free

7. CompressNow

CompressNow is a free online service that lets you upload images from
your computer, choose a compression percentage and download the
optimized image. It supports GIF, JPG and PNG formats.

The service also allows the drag and drop of multiple images from you
computer, with a max upload of 10 images and a max individual file size
of 3MB.

Price: Free (online uploader)

8. Trimage

Trimage is a cross-platform tool for optimizing PNG and JPG files
using OptiPNG, PNGCrush, AdvPNG or JPEGOptim, depending on the file
type. Images are losslessly compressed on the highest available
compression levels, with EXIF and other metadata removed.

Trimage is available to download for various platforms including Mac OS X, Windows and Linux.

Price: Free

9. PunyPNG

PunyPNG is image compression tool for designers and developers that
dramatically reduces the size of your images without any loss in
quality. It first analyzes the content of your image and figures out the
best web optimization technique and format to use. It supports the most
popular formats and, depending on the file, PunyPNG will decide how to
convert your image to ensure the best possible results.

Price: Free trial for higher compression and lossy
optimizations; Basic plan is $3 per month (first month free) or $30 per
year; Pro plan is $6 per month (first month free) or $65 per year; Team
plan is $12 per month (first month free) or $125 per year.

10. PNG Optimizer

PNG Optimizer cleans your PNG files of useless or wrong information,
reduces their weight and converts PNG into other lossless image formats
such as BMP, GIF OR TGA. It also supports animated PNGs and is available
on Windows XP, Vista and 7. You can also easily create PNG screenshots
within a simple, productive user interface.

Price: Free

11. Shrink Pictures

Shrink Pictures allows you to resize pictures and choose the level of
compression applied, and it supports JPG, GIF and PNG. You can select
the maximum image dimension, apply special effects, and download the
optimized images.

Shrink Pictures ensures privacy by using an automated script to remove any processed images from the server.

Price: Free (online uploader)

12. ImageOptim

12-ImageOptim

ImageOptim optimizes images by finding the best compression
parameters and removing unnecessary comments and color profiles. It
handles PNG, JPEG, and GIF formats.

It's also easy to use; just drag and drop images or folders into the
window and they will be optimized in-place. You can also drop files on
ImageOptim's dock icon, use the Services menu in Finder (on Macs), or
launch it from a shell script.

Price: Free

13. Blubox

BluBox is a Windows-based photo compressor that uses advanced image
algorithms to compress your images by up to 90%, while retaining the
original resolution and quality for printing and viewing. It supports
more than 60 popular image formats and can even preview regular ZIP
archives.

Blubox includes Preview and Slideshow features, so there's no need to extract your pictures to view them.

Price: Free version (ad-supported); full license ~$35

14. Image Optimizer

The Online Image Optimizer from Dynamic Drive lets you easily
optimize GIFs, JPGs and PNGs so they load as fast as possible. The
images can be converted from one file type to another, with an upload
size limit of 2.86MB.

You can enter the URL of the image or upload it from your computers,
choose your image conversion, optimize it and download the results.

Price: Free (online uploader)

15. JPEG Optimizer

JPEG Optimizer is a free online tool to resize and compress your
photos and images in order to reduce bandwidth and use them on blogs,
forums and emails.

Simply upload the image you wish to optimize, choose a compression
level (from 0-99, with the default at 65), pick your required image
width (if you would like the image resized) and click "Optimize Photo."

Price: Free (online uploader)

16. JPEG Reducer

JPEG Reducer shrinks the sizes of your images and photos to make them
load faster, and works by using lossy compression. However, you may not
even notice that any changes have been made.

Just upload your image or enter its URL and press "Reduce It." You
can then view the compressed images and thumbnails, and right-click the
image to save it.

Price: Free (online uploader)

17. FILEMinimizer Pictures

FILEMinimizer Pictures allows you to reduce the size of you images
and photos by up to 98% and supports a variety of formats, including
JPG, BMP, GIF, TIFF, PNG and EMF. You can optimize your images and send
them via email, or upload them to Facebook. Four different compression
levels are available, and you can choose to process a batch and decide
how the EXIF data is handled.

Price: Free

18. TinyPNG

18-TinyPNG

TinyPNG enables advanced lossy compression for PNG images. It
preserves full alpha transparency and reduces the file size by
selectively decreasing the number of colors and bytes in the image.

The effect is nearly invisible, but it makes a large difference in
file size. It takes 24-bit PNG files and converts them to much smaller
8-bit indexed color images, with all unnecessary metadata stripped as
well.

Price: Free (online uploader)




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