OrbConvert converts your image files online. Amongst many others, we support PNG, JPG, JPEG, WEBP, GIF, SVG and TIFF. You can use the options to control image resolution, quality and file size.
From
Tagged Image File Format
Built for print and archiving: lossless, and able to carry multiple pages. Files are large and browsers will not display it, so it is not a format to publish online.
All TIFF conversionsTo
Silicon Graphics Image
The native image format of Silicon Graphics workstations, still used in visual-effects pipelines. It carries transparency and holds 8 or 16 bits per channel.
All SGI conversions