RRDweb is a lightweight rrd browser. It enables browse rrd files via web with various options in a given system path.
Edit configuration at etc/rrdweb.yaml, for example,
--- # where you store your rrd files rrd_root: /tmp/rrd # the path to your rrdtool rrd_tool: static-rrdtool
twisted rrdweb -c etc/rrdweb.yaml -p 8080
Then, visit RRDweb using your web browser
http://localhost:8080/