How can i turn png to pdf without compression?

[good_hands4338]

I have multiple png that I want to merge into one pdf file. and i want it without any compression.

I tried the option menu which you can see on the screenshot, but it still compress pretty much a lot. 

Is there any way to keep the png quality? 

[gary_sc]

Hi, @good_hands4338, what kind of pngs are these? -8 or -24?

PNG-8 has 256 hues, shades, and luminosity; total. That's it, just like any GIF.

PNG-24 is like a JPG image (8x8x8 bits of information) but is not lossy.

Are these PNG images of text or of images? Can you share a sample image?

Thank you,

[JR Boulay · Accepted solution]

PNG conversion can be done using lossless compression (ZIP, JBIG, JPEG2000).
An uncompressed PNG file only takes up extra space.
The conversion settings can be adjusted in Preferences: