Learn how to save TIFF image files as PNGs with ease in Adobe Photoshop.
Change your image format to a PNG file.
Going from TIFF images (tagged image file format) to the PNG file format (portable network graphics) may be necessary if you are trying to make a large file smaller. Both are lossless compression raster graphics files, but converting to PNG gives you a more manageable file size that’s compatible with all web browsers.
How to make your TIFF into a PNG output file.
Select File and choose Save As. From the options, select PNG.
Choose an interlace option. The None option gives you the image only when the download finishes. Selecting the Interlaced option makes the download time seem shorter, as it shows you a low-res version of the image as it downloads, but gives you a larger file size.
You now have a PNG file ready to use online. Or, use your more manageable-sized PNG image in other Adobe systems like Adobe InDesign.