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Re:Show HN: Jpeg.io – Convert any major image format into a ... by undecidabot on Wednesday September 28, 2016 @09:24AM (#12597394)
Maybe it's just my computer, but I'm getting very different file sizes (using Firefox's view image info).

original - 200.69 KB (205,510 bytes)

jpeg.io - 163.29 KB (167,212 bytes)

Photoshop - 206.41 KB (211,361 bytes)

tinyping - 190.59 KB (195,160 bytes)

EDIT: pi.gy mentions the following in its FAQ [1]:

Q: Does this service compress images?

A: No, but JPEG's might lose about 0.5% of the quality thanks to CloudFlare. Other than that your image stays just like you uploaded it. But we do strip the comments and GPS details for security & privacy reasons.

[1]: http://pi.gy/

Re:Show HN: Jpeg.io – Convert any major image format into a ... by tedmiston on Wednesday September 28, 2016 @02:21PM (#12599983)
Confirmed that the file sizes you list are also what's shown in Safari dev tools.