OpenCCmanWhat is OpenCC? Meet the open-source project behind OpenCCman
Open Chinese Convert (OpenCC) is the open-source project that supplies the conversion engine and dictionaries used by OpenCCman.
What does OpenCC provide?
OpenCC provides conversion dictionaries, a reusable library, command-line tools and dictionary-building tools. Its configurable conversion chains distinguish Simplified and Traditional characters, character variants, and some regional word choices for Mainland China, Taiwan and Hong Kong. The conversion is dictionary-based and deterministic; it can run offline without a generative AI service.
OpenCC also documents limited Japanese character-form conversion. That upstream capability is separate from the presets described in this site's OpenCCman preset guide.
How does OpenCCman relate to it?
OpenCC is the upstream open-source project. OpenCCman is a separate iPhone, iPad and Mac app that integrates the engine through a Swift package. The app adds an Apple-platform interface, presets, TXT import and export, and Mac selection shortcuts. It is not an official OpenCC app and does not expose every upstream configuration or command-line feature.
If you want to convert text in the app, start with the first-conversion guide. If you need to develop against OpenCC itself, use the upstream repository and documentation.
What are the limits, and where can I read more?
OpenCC changes character forms and dictionary phrases. It does not translate between languages such as Mandarin and Cantonese, and its output is not a substitute for reviewing names, quotations or specialist terms. Which regional forms appear depends on the selected conversion configuration.
Read the upstream README for supported tools and configurations, its design principles for conversion rules, and the Apache 2.0 license for the project's terms. OpenCCman has its own source repository.
Ready to try it?
OpenCCman converts on your device. Download it for iPhone, iPad or Mac, or check support if a step does not work as described.