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A comment on Show HN: Jpeg.io – Convert any major image format into a highly optimized JPEG. Parent comment

Re:Show HN: Jpeg.io – Convert any major image format into a ... by izacus on Wednesday September 28, 2016 @08:12AM (#12597042)
Pretty much everywhere where you're not forced to use PNG. JPEG is significantly smaller and on most devices faster to decode.
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Re:Show HN: Jpeg.io – Convert any major image format into a ... by jimboj on Wednesday September 28, 2016 @09:11AM (#12597321)
It totally depends on the situation, JPEG isn't always smaller, and it's lossy unlike PNG. Flat colour images like logos will be smaller as PNG, and look better too. PNGs also support transparency.
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Re:Show HN: Jpeg.io – Convert any major image format into a ... by izacus on Wednesday September 28, 2016 @09:50AM (#12597576)
Yes, this is kinda what I mean with "where you're not forced to use PNG". If you need transparency or you have tiny flat colored icons, PNG is better. For any kind of complex images JPEG tends to be even 10x or so smaller.
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