How to convert SFW files to GIF online?

Step 1.

Upload SFW-file

Click "Choose File" button to select a sfw file on your computer. SFW file size can be up to 50 Mb.
Step 2.

Convert SFW to GIF

Click "Convert" button to start conversion.
Step 3.

Download your GIF

When the conversion process is complete, you can download the GIF file.

Information about SFW and GIF file formats

Name SFW GIF
Full name SFW, Seattle FilmWorks image GIF - CompuServe Graphics Interchange Format
File extension .sfw .gif
MIME type image/gif
Developed by Seattle Filmworks CompuServe
Type of format Raster image lossless bitmap image format
Description Bitmap images with a SFW file extension have been created with the, by now, outdated application Seattle FilmWorks which was used for film processing. Some programs are still able to view SFW files even though files with this extension use a proprietary format. Seattle FilmWorks and PhotoWorks have been discontinued. The Graphics Interchange Format (better known by its acronym GIF) is a bitmap image format that was introduced by CompuServe in 1987 and has since come into widespread usage on the World Wide Web due to its wide support and portability.
Technical details The SFW file format is actually an MGI PhotoSuite file and a raster image file. This file extension is also captured by IrfanView, Graphics Converter Pro and others. GIF supports up to 8 bits per pixel for each image, allowing a single image to reference its own palette of up to 256 different colors chosen from the 24-bit RGB color space. GIF images are compressed using the Lempel-Ziv-Welch (LZW) lossless data compression technique to reduce the file size without degrading the visual quality.
Associated programs SFW2JPG, XnViewMP, SFW PhotoWorks, American Greetings SFW & PWP File Converter Apple Safari, Google Chrome, Mozilla Firefox, Internet Explorer, Adobe Photoshop, Paint Shop Pro, the GIMP, ImageMagick, IrfanView, Pixel image editor, Paint.NET.
Wiki https://itstillworks.com/sfw-file-extension-8196552.html https://en.wikipedia.org/wiki/GIF