How to reduce the jpeg picture file size?

Hello,

I am finding it very hard to keep the file size of my jpeg images something between 20 - 30KB.

If you open this image it is 19.0KB but if I open this file in photoshop and save it as jpeg with "Medium" quality its size becomes 40KB

Can anyone please help me how to keep the file size under control?

 

Save for web>medium>50% and it is saved at 17.3 KB and could most likely go lower. Here it is for you to compare:

 

Use an image editor, Acdsee is a good one as well.. you can easily use it to resize it and then save it again as jpg

 

Thank you very much. It worked for me

 

you can reduce the image size without reducing image quality: in photoshop you press alt + shift + ctrl + s and then you select the jpeg format with a compression quality "high". You still produce good quality images but the file size 18.84kb

 

This is exactly what I do

 

i always use the save as web. it saves alot of KB. cheers!

 

fiel>>save for web /devices, OR, you can hotkey it: ctrl,alt,shift,s

However for a file with few gradients or colours... saving as a gif would be the best choice. I have it down to 6K here, and it still looks sharp.

http://dabzo.com/sharing/bunny.gif

 

if you open an already compressed jpeg, then resave again as a jpeg you will increase the file size, as there are jpeg degredation/artifacts that are being saved in the 2nd save that did not exist in the original psd (or artwork).

use the original source to reduce the files size.

Also did you know you can compress certain areas of a jpg only, ie the background. this means the foreground can be high setting and the background low.

You will need software to do this. google it there are free programs.

yes and as above you should match your image to the filetype. ie if its a photo or picture use jpg. if its line art or few colors use gif or png-8. there no point using millions of colors when 32 will do the job.

also jpeg should be saved as greyscale if there are no colurs used. that will reduce the filessize

 

Didn't know that about jpg degrediation. Interesting stuff, thanks!

 

best software for compression?

 

yes try for an experiment, opening a jpg, then saving it, then closing it, then opeing it again, then saving it, etc

do this about 5/6 time u will see even if you set it on 80% (level 9/10) high quality, it will be all degraded.

 

I'm interested to check in to that... I guess that makes .raw files all the more beneficial to work from.

 

Adobe has you covered.