How Do I Decrease Image File Size, Keeping Image Quality?

I have a 468x60 promotional banner and it is currently 69.3 KB and I need it to go down to 50 KB or under. Can anyone please let me know how to do this without losing any of the image quality or anything else. I want it to be Exactly the same, but just smaller in file size. Can anyone help? Thanks!

 

if you have photoshop software ,, once you open the file in photoshop, Press CTRL+ALT+SHIFT+S or SAVE FOR WEB.

you got another window where you can reduce the size just by changing the formats and quality (60% average we keep)

This way you reduce your banner size to 30%-40%

Hope it helps

Cheers

 

I've been always facing this problem and i've tried all methods and almost all was useless.

But i found the following gives max size reduce without decreasing the quality

1- PNG Images
Use this free website http://tinypng.org

2- JPEG JPG Images
Use this freeware tool "Advanced JPEG Compressor"

3- GIF and others
Use photoshop and before you export it, just Go to the menu bar, Image -> Adjustment -> Posterize

It has a slider for posterize level adjustment. Slowly adjust it to your desired quality. If you observed it carefully, you will able to see some colors are being discarded, and that's the way to reduce the file size.

Hope it helps

 

Thanks a lot I used the Tiny PNG and I have got my reduced image already, thanks again, the quality is just as good as the original too.

 

Thanks for this. It's good to have an understanding on how to actually do this, while keeping reasonable quality of the image. Thanks nenen.

 

Oh, I'm so glad I found this thread, been looking for something like this for a while now. Thanks a bunch

 

I like your post. Thanks for this

 

I have not tried those online tools. I will note that at a software level, Adobe Fireworks is MILES ahead of Photoshop on optimization of images for the web. Photoshop just has a slider with a few defaults and it's complete guesswork. With Fireworks, you can save your image according to % of quality, all the way from 0 to 100. You can basically export at a relatively low quality (start around 60%) and see if it's good enough. If it's too poor, work your way back up incrementally until your happy.

Alternatively, you can work in the opposite direction: start at 90% and keep exporting lower until you reach the low end of the threshold that you'd be satisfied with.

Another really nice touch with Fireworks: you can also do selective compression, e.g. higher quality surrounding text etc.

I still have regrets that we never got proper support for JPEG2000 (which is misleadingly named, since the format is not closely related to JPEG). It supports transparency *and* smaller file sizes than regular JPEG (making it a very attractive substitute to PNG32 where detail and transparency need to be combined). But unfortunately, not enough of the tech jumped on the bandwagon, even though it was developed a long time ago.

 

Thank you for the solution, i use photoshop and i was looking to do the same.

 

Damn that tinypng site does some great compression.

 

Thanks for this info!

 

I recommend Smush it by Yahoo, if you are using WordPress there is a plugin that integrate with your media adn automatically optimize them.

 

You can try riot image converter. It's a super image converter.