TiddlyWiki minangka wiki pribadi lan notebook non-linear kanggo ngatur lan nuduhake informasi sing kompleks. Iki minangka wiki aplikasi aplikasi kaca sing mbukak kaca kanthi bentuk file HTML siji sing kalebu CSS, JavaScript, lan konten. Iki dirancang supaya gampang kanggo ngatur lan mbentuk maneh gumantung saka aplikasi. Iki nggampangake panggunaan konten kanthi misahake menyang potongan cilik sing diarani Tiddlers.

TiddlyWiki is designed for customization and to be shaped according to users’ specific needs, perhaps comparable to a high-end programming language. As such, it can be shaped into a wide and arbitrary range of special applications. Examples include niche note taking applications, to-do lists, presentations, collections, authoring tools, personal databases, recipe collections, etc.

Although there are many TiddlyWiki documents on the Web, the majority of TiddlyWikis reside on personal computers or in the cloud, or are exchanged over email, in a manner similar to word processing documents and spreadsheets. As a single HTML file, or saved as an HTA file in Microsoft Windows (allowing corporate IE lockdown to be bypassed), TiddlyWiki can be useful in corporate environments where red tape or IT resources might prevent the use of a wiki that requires a more complicated installation.