Offline Simplified ⇄ Traditional Chinese conversion for NVDA.
OpenCC Chinese Converter converts the selected text or the clipboard text between Simplified and Traditional Chinese, speaks the result, and copies it to the clipboard. It runs completely offline — all dictionaries are bundled, so no internet connection is needed.
- Convert the selected text or the clipboard text from a quick command layer, and swap the conversion direction on the fly.
- The result is spoken and copied to the clipboard.
- Convert in either direction — Simplified → Traditional or Traditional → Simplified, including Taiwan-standard and phrase-level variants — selectable in the add-on settings.
- NVDA 2024.1 or later (last tested with NVDA 2026.1).
- Download
openccConverter-<version>.nvda-addon. - Open it with NVDA (or use NVDA menu → Tools → Add-on store → Install from external source) and follow the prompts.
- Restart NVDA when asked.
Press NVDA+shift+c to open the command layer (you'll hear a tone), then
press one key:
s— convert the selected text.c— convert the clipboard text.w— swap the conversion direction.
Any other key dismisses the layer. The full converted text is placed on the clipboard. The result is then spoken: short results in full, large results as a character count (so a huge conversion isn't read out in its entirety). A progress tone repeats while a long conversion is still running — handy for large inputs such as a whole book.
Swapping the direction (w) announces the new direction and, if you have
text selected, converts that selection in the new direction. You can reassign
the layer gesture in NVDA's Input Gestures dialog, under the OpenCC
Converter category.
Choose the conversion direction in NVDA menu → Preferences → Settings → OpenCC Chinese Converter. Your choice is saved and persists across restarts. Until you choose a direction yourself, the default follows NVDA's interface language: on a Simplified-Chinese NVDA (zh_CN, zh_SG) it is Traditional Chinese (Taiwan) → Simplified Chinese (with phrases); on a Hong Kong or Macau NVDA (zh_HK, zh_MO) it is Simplified → Traditional Chinese; for every other language — including Taiwan — it is Simplified → Traditional Chinese (Taiwan, with phrases), which produces idiomatic Taiwanese vocabulary (for example 软件 → 軟體, 内存 → 記憶體).
OpenCC Chinese Converter is licensed under the GNU General Public License, version 2 or later (see COPYING.txt). It bundles, unmodified, the pure-Python opencc-purepy engine (MIT License) together with OpenCC dictionary data (Apache License 2.0).