"Will It 'Buzz?"

Compare Browser Complex Shaping vs HarfBuzz .

1. Word List Drag Word List .TXT file

This tool compares the browser's rendering of the font against HarfBuzz.

Load a word-list and a font, and let the tool shape verify.

Note that the HarfBuzz check does not perform BiDi operations, but the browser will - this will produce 'false-positives'.

Hover the mouse over the failure words to show a render.
2. Font Drag Font .TTF file
3. Settings Browser HTML Locale (e.g. `ur`):
 HarfBuzz Script (e.g. `arab`):

HarfBuzz Language (e.g. `URD `):
4. Process
To load files: Drag and drop; right-mouse-click. On phone/tablet, double tap to load.

2026-03-25 21:10