Adobe Animate: Use Adobe Animate to open Flash files and export them to HTML5 Canvas format.
Google Swiffas: A command-line tool by Google for converting SWF files to HTML5.
CreateJS Suite: Utilize EaselJS from the CreateJS suite for creating HTML5 canvas-based animations.
Mozilla Shumway: An open-source project by Mozilla that runs SWF files without Flash Player.
SWF to HTML5 Converters: Consider third-party tools like Sothink SWF Decompiler or iSpring Free for SWF to HTML5 conversion.
Professional Services: For complex Flash applications, hiring a professional service or developer with expertise in Flash-to-HTML5 conversion can be effective.
