This HTML page allows you to expand information in the lines of the UnicodeData.txt file, edit them and generate a new version. It also checks the data for validity in a number of areas.
It can be helpful if you have the misfortune to pore over the source code of the UnicodeData.txt file and find your eyes blurring as you count fields. And it is particularly useful for people submitting proposals for new scripts or characters to the Unicode Consortium, to help them generate correct lists of unicode properties for inclusion in the proposal. (You can even build the whole thing in the UI, error free, by starting with a number of blank lines, such as
The image below shows the page in action. I dropped in a couple of lines from the Ahom script proposal, and vandalised them slightly. The first panel shows that the app has spotted an error. I used the column to the right to edit out the error in the second panel, and regenerated the lines in the box below.
Having made edits you can copy paste the output back into the top box to send it through the sausage machine again, and check that there are no remaining errors.
You can add a whole script block at a time to the top box, or a single line – as you like.
Well, it’s a bit esoteric, but hopefully it will be useful to someone somewhere.