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ImageOptim is a front-end (GUI) for set of tools for optimisation of PNG and JPEG images.

Optimisation makes files smaller (in terms of disk space) by finding optimal compression parameters and by removing unneccessary information, like file comments, EXIF tags and color profiles.

What's New

Version 1.5.4.1:
  • Added Revert to Original option (restores unoptimized file)
  • Added cache of already-optimized files. In some cases ImageOptim will be able to quickly skip files it knows it can't optimize any further

Requirements

  • OS X 10.6.8 or later

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ImageOptim User Discussion

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Most Helpful Reviews...

MacUpdate most helpful reviews user icon

Excellent and flexible image compression tool. Use it regularly for all my web projects.

3 people found this review helpful
Version 1.4.2
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TomK9265 Member IconReview+0
TomK9265
+0

Incredibly useful and easy to use

Reply0 replies
Version 1.5.4.1
gtrsteve Member IconComment+26
gtrsteve
+0

You've got Version 1.5.3 here instead of 1.5.4.1

Reply0 replies
Version 1.5.4.1
Ochre Member IconComment+67
Ochre
+0

The current stable version available from the website appears to be 1.5.1, not 1.5.3, and is compatible with 10.8+.

Reply0 replies
Version 1.5.3
bbbc Member IconReview+15
bbbc
+0

The last version to work with Snow Leopard 10.6 and Lion 10.7 is ImageOptim1.5.4a4.tar.bz2 , which is a beta. Just add the site's domain name in front of this archive's name to download.

Reply0 replies
Version 1.5.3
Mikael B Member IconReview+415
Mikael B
+1

Indispensable. I'm looking into getting Codekit and if so I might not need this. But It's been a great tool that always shave off some more with quality retained or make images generally publishable.

Reply0 replies
Version 1.5.0
Ochre Member IconReview+67
Ochre
+1

Does a good job of reducing file sizes, but I've encountered several instance where it won't complete its task, indefinitely showing the cog icon next to the images being processed.
Also, the dev, for some reason best known to himself, has decided to allow the Sparkle updater to download updates without user consent, and without offering a user-facing option allowing the user to disable it. Out of the dozen or more apps I have that use the Sparkle framework, this is the only one to be so coded. After conversing with him by email and presenting what I thought were good reasons to include such a feature, the dev still refuses to do so.
Hence, only 3 stars.

Reply0 replies
Version 1.4.5
Negritude Member IconComment+1082
Negritude
+2

"Now code-signed. (Purchased 1-year Developer ID from Apple to avoid blocking of independent software in OS X 10.8 Mountain Lion and 10.9 Mavericks.)"

Please donate to the programmer, to help them pay Apple's developer tax:

http://imageoptim.com/donate.html

Reply1 reply
Version 1.4.5
Ochre
+1

Non-code signed apps are not "blocked" in 10.8 (I can't comment on 10.9). All such apps can be permitted to launch by changing the setting in System Preferences > Security & Privacy > Allow Applications downloaded from: Anywhere. Or, you can allow such apps on an individual basis by leaving the aforementioned setting at its default and opening them by right-clicking and choosing, "Open" from the contextual menu. You will be prompted to authenticate as an admin user, and this app will now be permitted to launch like any other.

Zo219 Member IconComment+506
Zo219
+0

Terrific and free! And boy does it get the crap out of jpegs for web use.

Reply0 replies
Version 1.4.4
Tom E. Gun Member IconReview+39
Tom E. Gun
+1

PRO: Easy to use, reduces file sizes notably, drag & drop, FREEWARE!
CONS: Slow for bigger images, ruins CMYK images, sometimes you need to do a 2nd pass to reduce even more (should be done automatically).

This is my feedback to help improve this great app! =)

Reply0 replies
Version 1.4.2
Afreese Member IconReview+10
Afreese
+3

Excellent and flexible image compression tool. Use it regularly for all my web projects.

Reply0 replies
Version 1.4.2
user icon+0
P01nt
Version 1.5.4.1
user icon+2
ErvinsS
Version 1.5.4
user icon+0
SD-Solutions
Version 1.5.2
user icon+1
shoeboot
Version 1.4.5
user icon+0
PeterHicks7166
Version 1.4.4
user icon+13
Iztoubade
Version 1.4.3
user icon+2
Sandro-Bilbeisi
Version 1.4.3
user icon+10
Jibbe
Version 1.4.1
user icon+0
Ricrd
Version 1.4.1
> 5 31

Ratings

Overall
(31)
Current Version (1.x)
(31)

Details

Downloads 32,964
Version Downloads 1,706
License Free
Date 11 Jul 2014
Platform Intel 64 / OS X
Price Free
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