An image converter is a tool or software that changes the format of an image file from one type to another, such as:

1. JPEG to PNG
2. PNG to WebP
3. GIF to JPG
4. BMP to TIFF

Image converters are useful for:

1. Compatibility: Ensuring images work on specific devices or platforms.
2. Optimization: Reducing file size or improving web performance.
3. Editing: Converting images to formats compatible with editing software.

Some common image formats include:

1. JPEG (Joint Photographic Experts Group)
2. PNG (Portable Network Graphics)
3. GIF (Graphics Interchange Format)
4. WebP (Web Picture)
5. BMP (Bitmap)
6. TIFF (Tagged Image File Format)