Is there an easy way to convert older FLA / SWF files to HTML 5?

Use Google Swiffy, Swiffy converts Flash SWF files to HTML5, allowing you to reuse Flash content on devices without a Flash player (such as iPhones and iPads) http://www.google.com/doubleclick/studio/swiffy/

There is one pretty new tool that can also handle a bit more advanced flash files (e.g. containing AS2 or AS3): http://www.pixelplant.com/ Feel free to check it out. I am currently supporting the team in the area of business modeling, etc. So any feedback is highly appreciated. @ideasenabled | http://www.ideasenabled.com/

There are plenty of tool which says they can convert Flash to HTML5 but basically considering digital advertisement banner which was previously built in flash and now need to change in HTML5. We need to improve the Swiffy tool. Drawback: Provide extension in .mxp which doesnt work in Adobe extension No placeholder for macros. However you can read about few tools which can give you idea http://adtagmacros.blogspot.com/2015/08/flash-to-html5-converter-tools.html

Wallaby and Swiffy are both VERY limited.If your swfs have ANY code in them..it wont convert it. We can however : http://ConvertMyFlash.com We convert FLASH sites into HTML5 sites ( powered by WordPress ) ..in just 72hrs Enabling your business to be : +Usable to 5 BILLION Smartphones +Display on 180 Million iPads+iPhones +Increase their Search Rankings +Shareable on Social Sites.

There is an open source project working on this called Gordon located here:  https://github.com/tobeytailor/gordon