na-adjective
general-purpose; all-purpose; one-size-fits-all
Describes something designed to be used in many different situations, not specialized. Often used for tools, software, or solutions.
このソフトは汎用的な設計で、様々な業界で使われている。
This software has a general-purpose design and is used in various industries.
汎用的なスキルを身につけると、仕事の幅が広がる。
Acquiring all-purpose skills broadens your job opportunities.
万能 means 'all-powerful' or 'omnipotent', implying the ability to do anything, whereas 汎用的 simply means suitable for many purposes without the connotation of unlimited power.
Compound of 汎用 (はんよう, 'general use') + 的 (てき, '-like, -type'). 汎用 is from 汎 (はん, 'pan-, broad') + 用 (よう, 'use').