https://www.vertopal.com/en/convert/srf-to-flif
Online SRF to FLIF Converter - Vertopal
Convert SRF images to FLIF file format using Vertopal free online converter tools. You can edit and optimize your images.
onlinesrfflifconverter
https://blog.online-convert.com/tag/flif/
flif | Online file conversion blog
file conversionflifonlineblog
https://abasy.ccg.unam.mx/details?regnetid=224308_v2020_sSW18&name=fliF
fliF - 224308_v2020_sSW18 - Abasy Atlas
flifatlas