What is the best program to edit swf files?

Question

Adobe Flash

Good day.
There was a need to change the size of several banners on the flash.
There are no sources, there are only swf and html files.
What is the best program to use? Adobe import as image

Answer 1

1) Try one of the many decompilers (SWF Decompiler, Flash Decompiler).
2) You can also try to convert SWF to HTML5 via Google Swify
If it works, then it will not be difficult to make changes to HTML