Mass Image Compressor

Batch Compress, Convert and Resize Images of your website or photos that you captured using camera. Mass Image Compressor meets the needs of Photographers, Web Developer and casual users who want to convert/optimize/resize images.

Purpose

You can reduce all images in a folder and sub-folders with just single click – saving your time and peaceful life 😌

Why Mass Image Compressor?

• It does what it says, and does it really well! Much better than the highly paid software available in market today. Also, it support raw image format of YOUR camera.
• It’s truly free. It’s published under AGPL 2 license for Open Source Software. Source code is open to see, share and use under this license.
• Unlike other software, you don’t have to go to each image and say ‘compress it’. Just drag one or more folder or images to the window and you are all set. MIC can find all images with in the folder and its sub-folders.
• Compress with control! You have control over quality and dimension (i.e. Compression Parameters) of the output images. You can evaluate and adjust your compression parameters by previewing an image.
• Supported input formats: jpg, jpeg, png, webp, gif, tif, tiff, avif, heic, jp2, bmp, arw (Sony), dng (Adobe), nef (Nikon), cr2/cr3/crw (Canon), dcr (Kodak), mrw (Minolta), orf (Olympus), raf (Fujifilm), pef (Pentax), raw, rw2 (Panasonic), srw (Samsung), erf (Epson), 3fr (Hasselblad), kdc/mos/mef.
• Supported output formats: JPG/JPEG, PNG, WebP, GIF, AVIF
• No Spyware. You cannot make a trojan horse made of glass 🤠 Our source is free for anyone to check. Also, our business model doesn’t require us selling user data.

Recognitions

While Mass Image Compressor has received “Open Source Excellence” award from SourceForge.

3rd Party Review

MajorGeeks is setting the standard for trusted software reviews and downloads for over two decades, checkout Major’s review of Mass Image Compressor

Changes in V4.0

1. Compress multiple folders (optionally, their sub folders) and multiple files
2. Integration with Windows Explorer’s ‘Send To’ menu.
3. Advanced Metadata copy options (EXIF+ XMP and IPTC). You can now skip sensitive metadata also (such as GPS location and serial number information of your camera).
4. Support for Animated Images as input and output (GIF, PNG, WebP)
5. Support for modern image formats as output such as WebP and AVIF.
6. Ability to select/deselect files from UI or via RegEx based filters (filename and file size)
7. Ability to apply Suffix/Prefix to compressed file names. Additionally, you can replace some text in output file name.
8. Advanced Preview to verify your compression settings are right. You can do pixel to pixel comparison of compressed image with CTRL + T option in Preview View.
9. Support for RAW format is solidified.
10. Advanced Output Settings – put it in ‘Compressed’ folder in the selected folder? Replace original files? Provide an output folder? Keep next to original image with some file name Suffix/Prefix? All covered now!
11. Advanced resizing options! Want to resize based on percentage? Long Edge? or for printing the photo? Creating 1x/2x/3x images for your application or website? Mass Image Compressor has your back for all your resizing needs!

Changes in v3.3.2

Nov 11, 2024

• Added Support for WebP Images (Input and Output)
• Using advanced metadata copy option (thanks to exiftool). The optional setting now allows most EXIF metadata are carried forward to compressed image.
• PNG compression is always lossless (no dithering)
• Ability to compress RAW images as JPEG/PNG/WebP instead of just JPEG. RAW are converted to JPEG if “Include Sub-Directories” is selected as we plan to copy RAW EXIF data to compressed image and WebP doesn’t support EXIF yet.
• Removed EXIF Comment tag with Software name

Changes in v3.3.3

March 31, 2025

• PNG lossy compression only if it retains minimum 90% quality

Github

https://github.com/Cognirush-Labs-LLP/icompress-win

Support & Feedback

You may give public feedback (as comment) or contact us.