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Original author(s)Yuking
Developer(s)Yuking, CSSlayer
Initial releaseAugust 28, 2002; 21 years ago (2002-08-28)
Stable release
5.0.8 / May 4, 2021; 3 years ago (2021-05-04)
Written in
  • C (Fcitx)
  • C++ (Fcitx 5)
Operating systemLinux, FreeBSD
Available inChinese
TypeInput method

Fcitx ([ˈfaɪtɪks], Chinese: 小企鹅输入法) stands for Flexible Context-aware Input Tool with eXtension support, is an input method framework with extension support for the X Window System that supports multiple input method engines including Pinyin transcription, table-based input methods (e.g. Wubi method), fcitx-chewing for Traditional Chinese, fcitx-keyboard for layout-based ones, fcitx-mozc for Japanese, and fcitx-hangul for Korean.

It supports UTF-8, GBK and GB 18030 character encodings, can run in Linux and FreeBSD, and supports XIM protocol, GTK+ (both 2 and 3) and Qt input method modules.

Before version 3.6, Fcitx used GBK encoding internally, which has been changed to UTF-8 in the 4.0 release. Since version 4.1, it has become highly modular, and has added support for Google Pinyin (which was ported from the Android version), fbterm, and KDE. The license was changed in the 5.0 release, from GPL to LGPL.


Available input method engines

Fcitx 4 Fcitx 5 Description
fcitx-anthy fcitx5-anthy A Japanese IME using the Anthy engine
fcitx-googlepinyin A Chinese IME using Google Pinyin which is ported from Android
fcitx-handwriting A handwriting IME using Zinnia as its backend
fcitx-hangul fcitx5-hangul A Korean IME
fcitx-keyboard An IME based on keyboard layouts
fcitx-kkc fcitx5-kkc A Japanese IME using the Kana to Kanji conversion (KKC) engine
fcitx-mozc fcitx5-mozc A Japanese IME using the mozc engine
fcitx-m17n fcitx5-m17n An engine allowing to use the large number of m17n input methods
fcitx-pinyin fcitx5-pinyin A Chinese IME
fcitx-rime fcitx5-rime A Chinese IME using the Rime engine
fcitx-qw Flexible Input Method Framework – QuWei engine
fcitx-skk fcitx5-skk A Japanese IME, using the Simple Kana to Kanji conversion (SKK) engine
fcitx-sunpinyin A Chinese IME using Sunpinyin as its backend
fcitx-table fcitx5-table For many table-based Chinese IMEs, e.g. Wubi and Zhengma
fcitx-unikey fcitx5-unikey A Vietnamese IME using the Unikey engine

Available separate modules

See also