Does PNG contain EXIF data like JPG?

Question

Edit: Version 1.5.0 (July 2017) of the Extensions to the PNG 1.2 Specification has finally added an EXIF chunk. It remains to be seen if encoders-decoders begin to support it.

Original: PNG does not embed EXIF info. It allows, however, to embed metadata "chunks" inside the image. Some of the standardized chunks correspond to a few EXIF attributes (physical dimensions, timestamp). And it's also possible to store arbitrary textual data as key=>value pairs, or to define new chunk types. So, you could in theory store any EXIF information... but, alas, in your own custom format. Some attempts to standarize have not caught up, it seems.

Edit: As of July 2017, PNG officially supports an eXIf chunk to store EXIF metadata (specification). ExifTool 10.59 and later write EXIF to this new chunk in PNG images.

Original: ImageMagick stores EXIF information in a PNG "Raw profile type APP1" zTXt chunk when converting from JPEG images. This method of storing EXIF in PNG images is also supported by ExifTool (and I believe Exiv2 too), but it is not part of the PNG or EXIF specification.

PNG does not support embedding of EXIF information. When you convert from JPEG to PNG the information is lost.

As of July 2017, there does appear to be officially registered chunk for EXIF data called... eXIf:

The data segment of the eXIf chunk contains an Exif profile in the format specified in "4.7.2 Interoperability Structure of APP1 in Compressed Data" of [CIPA DC-008-2016] except that the JPEG APP1 marker, length, and the "Exif ID code" described in 4.7.2(C), i.e., "Exif", NULL, and padding byte, are not included.

Note that this is both A) only a few months old (as of writing) and B) an optional extension, not part of the basic specification. Therefore, support for the eXIf chunk might be limited in many applications.

Yes and no.

As other answers have already stated, PNG didn't have a formal EXIF chunk until eXIf was added in v1.5.0 (2017), and to my knowledge this chunk still does not enjoy wide support.

But that's because it doesn't need it. Many pieces of software encode EXIF in a PNG by convention in an iTXt (or compressed zTXt) chunk notated "Raw profile type APP1". The newer eXIf chunk was intended to provide a standardised location for this, though in my opinion that ship has sailed now.

In addition, much of the EXIF standard's metadata can be represented by XMP, an alternative and newer metadata transport mechanism that has an EXIF namespace for precisely this purpose. PNG files have included XMP documents (including translated EXIF metadata) in iTXt chunks for years. You will find that many processors convert between the two on the fly.