Thelen, FabienneFabienneThelenHochmuth, JannisJannisHochmuthGriep, SvenSvenGriepSchwab, BenediktBenediktSchwabGoesmann, AlexanderAlexanderGoesmannFörster, FrankFrankFörster2025-11-122025-11-122025https://jlupub.ub.uni-giessen.de/handle/jlupub/20969https://doi.org/10.22029/jlupub-20318Motivation and Results: Crypt4GH-JS is a browser-ready implementation of the Crypt4GH file encryption standard written in JavaScript. While having minimal to no impact on data upload and download throughput this library enables on-the-fly encryption of arbitrary data in web applications, regardless of whether on the client or server side. As development moves more and more toward cloud-native applications, this library represents a significant step forward for flexible data security in the context of opaque cloud storage systems. Availability and implementation: Crypt4GH-JS can be installed via Node Package Manager (https://www.npmjs.com/package/crypt4gh_js) or through its public GitHub Repository (https://github.com/fathelen/crypt4ghJS), where the source code is available. Crypt4GH-JS can be tested in the browser using our demonstration website, which can be found at: https://fathelen.github.io/crypt4ghJS/.enNamensnennung 4.0 Internationalddc:570