Derive!

Derive! is a tool for applying phonological rules to IPA text. This program runs entirely in the browser and can be downloaded for offline use using the “Save Page As” feature of the browser. Documentation is available here.

Rules are defined using regular expressions using SPE-like syntax (default) or POSIX extended syntax. As not all the SPE metacharacters them appear on all keyboards, for reference (and copypasting) they are \()[]{},*+∅#XCV!₀₁₂₃₄₅₆₇₈₉⁰¹²³⁴⁵⁶⁷⁸⁹.