TiddlyWebAdaptor is a component of TiddlyWiki on Node.js. It provides the means to synchronise changes to tiddlers from the browser to a server, and from the server to the browser. It can be found in the plugin $:/plugins/tiddlywiki/tiddlyweb.

TiddlyWebAdaptor was designed to be compatible both with TiddlyWeb and with TiddlyWiki's own built-in server mechanism. The Bags and Recipes model is fully supported by TiddlyWeb, but TiddlyWiki's built-in server only supports a simplified model with a single bag and a single recipe.