Tool to resize and compress at least 2 images at once

Question

I am looking for Windows software, most desirably free or open source, but not necessarily, that will let me do the following actions at the same time, to more than 2 image files (i.e. to several files at once):

1. Resize the images (say from 1024x768 px to 800x600 px).
2. Compress the images.

I'd prefer a tool with a GUI.

Answer 1

I think you can do this with IrfanView.

Try Batch Conversion/Rename... from the File menu as explained in this forum.

Making Transparencies

Yes you can do this, too.

Follow this Steps:

• Select as "Output format" PNG
• Go to "Options" and select there
• Save Transparent Color
• Save Transparency as Alpha Challe

After that you can decide if you want to click on every Picture to select the color or you can use the Option

• Use main windows color for transparency

Answer 2

ImageMagick is designed for this purpose.

ImageMagick® is a software suite to create, edit, compose, or convert bitmap images. It can read and write images in a variety of formats (over 200) including PNG, JPEG, JPEG-2000, GIF, TIFF, DPX, EXR, WebP, Postscript, PDF, and SVG. Use ImageMagick to resize, flip, mirror, rotate, distort, shear and transform images, adjust image colors, apply various special effects, or draw text, lines, polygons, ellipses and Bézier curves.

Example of resizing/compressing 2 images at once:

convert -resize 64x64 -quality 85% in1.png out1.jpg & convert -resize 64x64 -quality 85% in2.png out2.jpg

Answer 3

Try Fast Stone Image viewer. I am using it for years - fast and powerful. In Tools - Batch convert you can set following settings for jpeg format

• Quality 1-10 (or use existing from the file)
• Photometric
• Color Subsampling
• Smoothing
• Optimise Huffman Table
• Progressive
• Keep EXIF Data

Also you can do much more in single pass in Advanced Options, like resize the larger edge to XXX pixels, put watermark in middle, crop center,...

Answer 4

xnView is another great media browser, viewer and converter. cross-platform and compatible with more than 500 formats.

in order to resize and compress multiple images with this software, you can select desired images and select Tools > Batch Convert or press ctrl+U. in the tab actions you can specify what transformations you would like done on the files.

Answer 5

Originally a Power Toy for XP, I always use Image Resizer for Windows - it has shell integration as well, so it's as simple as right-clicking on the image you want to resize, or set of images and resizing. It will allow you to resize the original or create new versions.

Answer 6

ComicRack, CbxConverter (WebP output only) - they are intended to convert comic books (i.e. zip or rar archives with images inside), but this format makes sense if you have multiple small files.