At first sight, this program is only an image viewer and converter. However, if you dig deeper you’ll find out that besides being free, it’s a multi-format graphic browser. It looks like Windows Explorer and it allows for fast browsing of directory contents in both thumbnail and preview views. It offers a large number of features. Among those, you can find a batch converter with support for more than 474 file formats in reading and 64 file formats in writing. This batch converter works very fast.
XnView
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