TweakPNG Screenshots

"The main window of TweakPNG allows you to load the image and view its detailed attributes."

"With TweakPNG you can edit the chunks, import or export them and also combine or split IDAT segments."

"Using this menu of TweakPNG you can insert background color, gamma, pixel size and more variables into the loaded image."

"TweakPNG comes with a built-in image viewer that can be accessed from the tools menu."

"In the preferences tab of TweakPNG you can select the compression level for new zTXt chunks."