Synchronet comes with a SSJS module (exec/webfileindex.ssjs) that can be used to provide web browser access to your configured File Areas for viewing files listing, file contents and downloading (not uploading) files.
This script is normally enabled and configured in SCFG->Servers->Web Server->Filebase Support... as follows:
╔════════════════════════════════════════╗ ║ Web Server Filebase Support ║ ╠════════════════════════════════════════╣ ║ │Enabled Yes ║ ║ │Index Script webfileindex.ssjs ║ ║ │VPath Prefix /files/ ║ ║ │VPath for VHosts N/A ║ ╚════════════════════════════════════════╝