Oniguruma

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Oniguruma
Original author	K. Kosako
Initial release	25 February 2002
Final release	6.9.10[1]  / 1 January 2025; 10 months ago (1 January 2025)
Repository	github.com/kkos/oniguruma
Written in	C
Operating system	Cross-platform
Type	regular expression library
License	2-clause BSD License

Oniguruma (鬼車) is a free and open-source regular expression library that supports a variety of character encodings, written by K. Kosako. The Ruby programming language, in version 1.9, as well as PHP's multi-byte string module (since PHP5), use Oniguruma as their regular expression engine.^[2] It is also used in products such as Atom^[3], EDK2 UEFI^[4], GyazMail, Take Command Console, Tera Term, TextMate, SubEthaEdit, jq, Sublime Text^[5] and VS Code^[6].

As of April 26, 2025, development of Oniguruma was stopped and the project was archived.^[7]

There used to be also a fork of Oniguruma called "Onigmo" (Oniguruma-mod) which includes some features introduced in Perl 5.10+.^[8] Ruby switched to it in version 2.0^[9] and features have been backported from Ruby to Onigmo. Take Command Console from version 20 to version 32 used to Onigmo.^[10] Take Command switched back to Oniguruma in version 33 as Onigmo is no longer being updated.^[11]

• Comparison of regular expression engines

• oniguruma on GitHub
• Archive of Oniguruma Homepage as of August 7, 2015

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