I have to save my images as png-8, 300ppp, with Photoshop CS6 and always works good. But today, the same image yesterday was 250kb, today is 1.1MB, without making any change. Can somebody help me, please? I work on Mac. Yesterday


Thanks for your help.

  • 2
    Hi Eva! What do you mean "the same image yesterday was 250kb"? Because one of your images here says "copia", so it's a different file. Maybe the second one was saved in PNG-24 instead of PNG-8?
    – Yisela
    Commented May 5, 2014 at 3:29
  • Yisela, I can see the png-8 and png-24 if I save for web devices, but if I save from the File - Save and select the png option, how can I know the png-number? EDIT: I take off the copy option and just go down 0.1MB :(
    – Eva
    Commented May 5, 2014 at 3:52
  • The two images you posted don't seem to be the ones that are described:J2kcw.png is 67018 bytes 454x346, and F1276.png is 54590 bytes, 475x294. So, if they are actually scaled-down copies of your two images, it's not easy to diagnose the problem. Can you post the actual problematic images? Commented May 5, 2014 at 16:35
  • Glen, yes I can, but they are huge and I don't know if I can do it here. 1 of them is a single curved line size 3579 × 715 and it's a 1,2 MB png very heavy. Here it is.
    – Eva
    Commented May 6, 2014 at 9:11
  • 1
    "Here it is." -- no, that's a 42-kilobyte JPEG. How about just running "pngcheck -v file.png" and see if that tells us anything useful, compared to the result of "pngcheck -v file.png" for the smaller one? Commented May 6, 2014 at 19:37

1 Answer 1


you might have saved the first file as - "save for web" and the next file as normal "save as"......so that can make difference in file size.

Probably try saving the files as - "save for web" with png-8 extension.

Hope it was helpful


  • Thanks, but the 65% of my job is save images as png, 300dpi. So, I know what these means. Maybe I didn't explain myself very well (English isn't my born language). If I take any other png image and re-saved, this one is three or four times bigger. I've tried with my own images, net images, purchases, and everytime if I save it again, they are huge. Happens with new draw images too. This never happened to me before. The only change I did in the last days it was installing more RAM memory to my MAC, but this is not a reason for the problem. But thank you anyway.
    – Eva
    Commented May 5, 2014 at 6:08
  • ok....thn i guess its some other problem....i donno if this wil help, but u can try removing your cashe files and try again.....
    – Aby
    Commented May 5, 2014 at 6:16
  • Thanks, but doesn't work :(
    – Eva
    Commented May 5, 2014 at 7:03

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.