PNGCommentator is an application born out of necessity. I needed to add custom metadata to some PNG image files and was amazed to find that there didn't seem to be a good way to do this. A few image editors have some very basic support for PNG metadata, but not enough for my needs. There are some command line tools with more support, but that is not really the simple, convenient workflow I was looking for.
Thus PNGCommentator was born. PNG metadata can now be added and edited at the click of a mouse.
Version 1.2 adds support for batch processing and customisable presets, allowing for much faster workflows. Text macros extend this even further, aloowing the software to automatically insert data such as the date or filename.

Requires Mac OS X 10.6 or higher
Installation is as simple as dragging the the application from the disk image to your hard drive.

For older Macs, you can download PNGCommentator 1.3 which supports Mac OS X 10.4 - Mac OS X 10.6 and is a Universal Binary.

Current version: 1.3.2
New in this version:
  • Minor bug fixes

Version: 1.3.1
New in this version:
  • Compatibility fix for latest versions of OS X
  • Now 64-bit/32-bit native, but PowerPC processors are no longer supported

Version: 1.3
New in this version:
  • Added templates, which allow you to add several comments at once. The new Template Editor allows you to manage your templates
  • Added new Comment Editor window (cmd-1) which aids the editing of comments with long content
  • New macros relating to image properties
  • Implemented interface localisation
  • Added Japanese localisation
  • Due to a bug, colour profiles and some other information was sometimes stripped from an image during saving. This has been fixed
  • PNGCommentator also used ot ignore unknown data chunks. These are now preserved
  • Other minor improvements
Version: 1.2.1
New in this version:
  • Changed string encodings from ASCII to UTF8 to improve international support
  • Added support for compresion of long text comments (this is applied automatically)

Version: 1.2
New in this version:
  • New metadata preset editor enhances the workflow
  • Batch processor window allows you to alter huge numbers of files rapidly
  • Macros can be used in metadata presets and batch processo
  • Other minor improvements

Version 1.1.1:
New in this version:
  • Improved copy and paste support
  • Introduced drag and drop support
  • Added filtering of comments by keyword
  • New, prettier icon!
  • Other minor improvements

Version: 1.1
New in this version:
Version: 1.0
  • Original Release