What's the best tool to compress images?

I'm looking for a tool that can handle a lot of large images, and make them as small in file size in 1 go. With as little effect as possible on the images of course :)

10 recommended

7
ImageOptim

Ivan Mirmaker of Qbserve time tracking app · Written
On Mac ImageOptim is a free and open-source app with a clean UI that uses the best command line optimization tools like MozJPEG and Pngcrush.
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Clean interface and easy-simply drag the images! I've tried to compress over 1k images at a time, it took a while but was pretty smooth.
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3
Pied Piper

Willie Morris3Formerly Amazon, Boeing, and Faithbox · Written
Had to.
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3
imgix

Your images, processed on the fly, delivered fast.

Ryan Hoover44Founder, Product Hunt · Written
Imgix is ideal for developers and regular image compression. We use it on Product Hunt to convert images and GIFs to difference sizes and resolutions. Without it, the site would be widely slow.
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9
Cloudinary

ranrubCloudinary.com · Written
I work there. It's a cloud-based image management system with endless features, from upload/storage, through a wide array of image manipulation options, to fast delivery via multiple CDNs. For image compressing, we have the full-auto mode, which selects the image format, quality and crops out the uninteresting parts, see http://cloudinary.com/blog/intro...
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You can create a free account easily on Cloudinary. I would recommend uploading high-res or lossless originals, then using w_[width],f_auto,q_auto to get scaled-down images that use the right image format for the particular image and browser (PNG, JPEG, lossy/lossless WebP if available, etc), at the right quality settings for the particular image so you get optimal compression without artifacts. You can use q_auto:eco to further reduce the file sizes, or q_auto:best if you're really picky about quality and want to bump it up.
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Arya KailashIntense Interactive · Written
You can convert one image at a time, you need to download desktop app to do further Note: it's paid.
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2
Kraken Image Optimizer

Optimize your images with blazing speed

Easy to use, the UI is good too
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2
Squash 2 for Mac

The easiest way to compress and optimize images for the web

Mike Coutermarsh48Code @ Product Hunt · Written
Squash is great. It's essentially the same as ImageOptim, but has a fancier interface.
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2
Telegram Desktop 1.0

Fast and secure desktop messaging app, now updated

Javier FrancoCTO and Inbound Marketeer in Ases Media · Written
Despite what it may seem, Telegram is a spectacular productivity tool. It is possible to store in your profile all types of files and the application allows you to compress all kinds of jpg, mov, etc files In an excellent option at the same time that is very fast.
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1
Compress JPEG

Arya KailashIntense Interactive · Written
You can convert 20 images at a time.
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1
TinyPNG

Compress PNG images that preserves full alpha transparency

Easy to use, fast and it reduces .png image sizes by 90% keeping a very good quality.
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