# PNG tricks

PNG files, in particular, are popular in CTF challenges, probably for their lossless compression suitable for hiding non-visual data in the image. PNG files can be dissected in Wireshark. To verify correcteness or attempt to repair corrupted PNGs you can use [pngcheck](http://libpng.org/pub/png/apps/pngcheck.html)

You can try to repair corrupted PNGs using online tools like: [https://online.officerecovery.com/pixrecovery/](https://online.officerecovery.com/pixrecovery/)