Tiddler's Green

As I've mentioned before, I have a lot of ideas flying around at once. Over the years, I have tried many various systems for keeping my thoughts organized in a single place - I've tried various wikis, vimwiki, a simple Git repository full of text files, you name it. However, lately I have been using something new, and since it blows my mind on a constant basis, I thought I'd share it with you: it's called TiddlyWiki.

I used TiddlyWiki a few years ago to help myself stay organized, but for whatever reason, I strayed away. Only after listening to a recent(ish) episode of Changelog did it occur to me to check out TiddlyWiki again. In the episode, the hosts interview TiddlyWiki's creator, and he has some very fascinating insights into programming in general. In addition to that, they discuss the relatively recent rewrite of TiddlyWiki 5. After hearing some programming wisdom and the praises of the new TiddlyWiki, I decided to check it out.

For the last few months, I have been entering all new ideas and things into my TiddlyWiki; it also has a journaling feature for my dev journal entries. I've even been transferring my thoughts from my old system (a Git repository full of simple text files) - that's how much I like it!

Why Do I Like It?

Complete Wiki in a Single File

Amazingly enough, TiddlyWiki is a wiki contained entirely in a single HTML file. This has some enormous benefits - it's easy to transport around and you don't need to install any server component or application for it to work. You just load it up into any browser and away you go 1)! This makes it very appealing for non-technical folk as well.

Concept of a "Tiddler"

One of the central ideas behind TiddlyWiki is that of the tiddler - it's somewhat analogous to a page in other wikis, but it's more like an atomic unit of information. You can store nearly anything in a tiddler - a chunk of wikitext for an article, and image, a JSON document, a table of data, you name it. Keeping the focus on small chunks of information allows you to stay organized and do some pretty fancy stuff, which I'll talk about shortly.

Sophisicated Markup Language

TiddlyWiki has its own markup language, which bears a passing resemblance to Markdown, but removes some of Markdown's more annoying features (I personally can never remember how to make a link in Markdown - is it [description](url) or (description)[url]?), and adds some additional power. I like to think of it as a mix between Markdown and DokuWiki, a favorite markup language of mine.

But that's not all! You know those data tiddlers I just mentioned? They're not just for show - the TiddlyWiki markup language allows us to make queries against JSON documents and tables and present that data in other tiddlers. And it doesn't stop there - you can manipulate other tiddlers containing markup, allowing you to embed the contents of other tiddlers or create lists of tiddlers based on queries. One use for this would be having a tiddler per table in a database schema, and then embedding a tiddler describing a table into an article that describes some code referring to that table. Another use is tracking your TODOs - you can have a tiddler per item, tag each with “TODO”, and then write some simple markup to list all tiddlers tagged with “TODO” but not with “Done”.

This is where my previous system suffered - if I wanted to have a custom view of the data within my system, I would basically need to write a script to parse text out and display it. With TiddlyWiki, you can create such custom views in seconds.

Extremely Customizable

TiddlyWiki is very customizable beyond its markup language. You see, the code for TiddlyWiki is all in JavaScript, broken up into various modules. And do you know where those modules are stored? That's right - as tiddlers! This aspect of TiddlyWiki reminds me a lot of Smalltalk - you can extend the markup language simply by creating tiddlers with some JavaScript in them, and the design of TiddlyWiki allows you to augment and replace parts of the UI as you see fit. I've added customizations such as allowing multiple workspaces of tiddlers, automatically generating links to ticketing systems, and displaying which tiddlers link to the current tiddler for easier navigation.

Drawbacks and Growing Pains

Not everything is perfect - there were definitely some things I had to get used to while learning to incorporate TiddlyWiki into my workflow.


One of the cardinal rules of TiddlyWiki that you'll read a lot about is to have a good backup system - TiddlyWiki itself doesn't back up tiddlers that you delete. My solution to this (which also helps me keep my wiki synchronized across machines) is to simply manage my wiki file in a Git repository.


The default editor for tiddlers is nice, but I will occasionally really miss using Vim for input, especially when entering or editing a lot of text. I wish I could use It's All Text!, but I run Firefox under a sandbox that forbids me from calling out to Vim, and I'm too lazy/paranoid to get it to work right. =) Perhaps I'll find a Vim-like editor that I can embed into TiddlyWiki itself!


This has been the hardest part of the transition. Sometimes, I'll forget to pull the newest version of my wiki onto a machine, or I'll forget to refresh the page after pushing. I'll make some changes, and then I'll end up with two wildly different wiki files that I now need to merge. Since it's all contained in a single HTML file, traditional merging tools aren't very effective here.

I've employed two strategies to handle this: one is if I know when the divergence happened, I'll look at the most recently changed tiddlers view, export them, checkout the older version of the wiki, and then import the new tiddlers.

The other strategy is a little more heavy-handed, but works better when it's not just a handful of tiddlers. You can install a tiddlywiki command line tool which allows you to export a set of tiddlers from a wiki file into a directory, using one file per tiddler. So I'll checkout one version of the wiki, and do something like this:

  $ tiddlywiki wiki --load wiki.html --savetiddlers '[all[]]' before

…then checkout the other, and do something similar 2):

  $ tiddlywiki wiki --load wiki.html --savetiddlers '[all[]]' after

Then I manually diff the files in the before and after directories.

Try It Out!

I highly recommend using TiddlyWiki as a personal knowledge base or journal; it's really a joy to use! The only problem is sometimes you get a little too carried away customizing it to perfectly fit your needs. =) If you're interested, the TiddlyWiki website itself is a TiddlyWiki instance, and you don't need permissions to alter tiddlers on there, since it's all within the browser. Head on over and give it a try!

  1. 1) You do need a browser extension if you want to be able to save easily, however.
  2. 2) [all[]] is a filter expression that returns all tiddlers in the Wiki