Defect Report

Noto fonts can be obtained from (unhinted OTF) or (hinted TTF). If you find a problem with either of these then please use this template to file a defect report. For feature requests and other matters, you can use part of the template and delete what you don't need.


Should be brief but contain essential information.


Full file name, for example ‘NotoSansArmenian-Regular.ttf’. You can upload the problem font here unless it is a Chinese, Japanese or Korean font (these are large).

Where the font came from, and when

For example: Site: Date: 2017-04-10 (preferred format)

Font Version

  • Mac - right mouse click on a font and try Preview to see version info.
  • Win -- right mouse click on a font (Local Disc > Windows > Fonts) and see version info on Properties.
  • Linux -- use (Gnome) Font Viewer: open a font and click on Info tab.

OS name and version

This is especially important if the font came pre-installed.

Application name and version

If the issue is observed using a specific app.


Summarize the issue briefly -- one paragraph preferred

  1. Steps to reproduce
  2. Observed results
  3. Expected results
  4. Additional information

Unicode chart, technical specs, shaping info, comparison with non-Noto fonts, comparison with earlier version of the same font (regression cases)

Character data

Please include real character data to illustrate your issue-- Unicode codepoints are helpful. This makes it possible for developers who don't know the language or script to copy/paste the text to reproduce the issue.


If possible, include a screenshot or an image illustrating the issue. Annotations are also helpful.

Tools for reporting bugs

Useful tools for reporting bugs are available at:

Harfbuzz hb-view and hb-shape

These are part of the HarfBuzz distribution and can help isolate if an issue is in the app/OS, shaping engine, or font.

  • hb-view renders the text with the exact font (for example, to see how ligatured characters shape) using your installed version of HarfBuzz.

For example:

  hb-view --font-file {path to font} --text-file {path to text file} --output-file '{sample}.png'
  • hb-shape shows glyph selection and positioning


  • Fontview displays the text.


  • Fontdiff displays the text using two versions of the font side by side.