jvenn is a JavaScript library for creating and displaying interactive Venn diagrams. It allows users to compare up to six lists, with support for both classical and Edwards-Venn layouts. The library enables dynamic interaction, including switching between layouts, highlighting intersection areas, and displaying counts. It can be easily integrated into web pages and provides features such as exporting diagrams as PNG files and downloading intersection data as CSV files. jvenn is open-source and available at http://bioinfo.genotoul.fr/jvenn. The library accepts three input formats: "Lists", "Intersection counts", and "Count lists". It can handle up to six lists and provides visualizations that help users understand the overlaps between them. jvenn also includes statistical charts to show the sizes of the lists and their intersections, making it useful for comparing different Venn diagrams. In a study comparing seven methods for RNA-seq data analysis, jvenn was used to generate a Venn diagram using an Edwards layout. The diagram showed the overlaps between the gene lists generated by the different methods. The results indicated that most genes were shared between methods, with some genes being specific to individual lists. jvenn offers several advantages over other Venn diagram tools, such as VENNTURE. It does not require local installation and provides a dynamic, interactive diagram with features for extracting gene lists and performing searches. It is also more flexible in terms of input formats and layout options. The library is designed for use in web environments and can be easily embedded into web pages. It is a simple JavaScript plug-in that allows developers to integrate it into any web environment. jvenn is available under the GNU GPL license and is suitable for use by both academic and non-academic users.jvenn is a JavaScript library for creating and displaying interactive Venn diagrams. It allows users to compare up to six lists, with support for both classical and Edwards-Venn layouts. The library enables dynamic interaction, including switching between layouts, highlighting intersection areas, and displaying counts. It can be easily integrated into web pages and provides features such as exporting diagrams as PNG files and downloading intersection data as CSV files. jvenn is open-source and available at http://bioinfo.genotoul.fr/jvenn. The library accepts three input formats: "Lists", "Intersection counts", and "Count lists". It can handle up to six lists and provides visualizations that help users understand the overlaps between them. jvenn also includes statistical charts to show the sizes of the lists and their intersections, making it useful for comparing different Venn diagrams. In a study comparing seven methods for RNA-seq data analysis, jvenn was used to generate a Venn diagram using an Edwards layout. The diagram showed the overlaps between the gene lists generated by the different methods. The results indicated that most genes were shared between methods, with some genes being specific to individual lists. jvenn offers several advantages over other Venn diagram tools, such as VENNTURE. It does not require local installation and provides a dynamic, interactive diagram with features for extracting gene lists and performing searches. It is also more flexible in terms of input formats and layout options. The library is designed for use in web environments and can be easily embedded into web pages. It is a simple JavaScript plug-in that allows developers to integrate it into any web environment. jvenn is available under the GNU GPL license and is suitable for use by both academic and non-academic users.