.bib to endnote
JabRef can export databases to EndNote-readable files. To use this feature, choose File -> Export, choose the file type Endnote (txt) and then specify the name of the export file.
Import to EndNote

To open up the file in EndNote, create a new database or open an old database in EndNote. Then select File -> Import, click on Choose File, then highlight the exported file and click Choose. Click on Import Options and select EndNote Import. Click Import to start the import.